Abu Dhabi, United Arab Emirates. STANDARD CONSTRUCTION SPECIFICATIONS (PART 1 - ROADS, Second Edition 2020)

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AASHTO

Designation

ASTM

Designation

Title

ASTM B189 -

05(2010)

Standard Specification for Lead-Coated and Lead-Alloy-
Coated Soft Copper Wire for Electrical Purposes.

ASTM B8 - 11

Standard Specification for Concentric-Lay-Stranded Copper
Conductors, Hard, Medium-Hard, or Soft.

ASTM B33 -

Standard Specification for Tin-Coated Soft or Annealed
Copper Wire for Electrical Purposes.

ASTM D1248 -

Standard Specification for Polyethylene Plastics Extrusion
Materials for Wire and Cable.

ASTM D1047 -

Standard Specification for Poly(Vinyl Chloride) Jacket for
Wire and Cable.

ASTM D372-

00(2006)

Standard Specification for Flexible Treated Sleeving Used for
Electrical Insulation (Withdrawn 2012).

ASTM A27 /

A27M - 10

Standard Specification for Steel Castings, Carbon, for
General Application.

ASTM A606 /

A606M - 09a

Standard Specification for Steel, Sheet and Strip, High-
Strength, Low-Alloy, Hot-Rolled and Cold-Rolled, with
Improved Atmospheric Corrosion Resistance.

AASHTO M

111M/M 111

Standard Specification for Zinc (Hot-Dip Galvanized)
Coatings on Iron and Steel Products.

ASTM B85 /

B85M - 10

Standard Specification for Aluminum-Alloy Die Castings.

ASTM B108 /

B108M - 12e1

Standard Specification for Aluminum-Alloy Permanent Mold
Castings.

ASTM B209 -

Standard Specification for Aluminum and Aluminum-Alloy
Sheet and Plate.

Table 9-2: Designations and titles for BS and BS EN standards that apply to traffic control

system works

Designation

BS EN

Designation

Title

BS EN 12368-

2006

Traffic Control Equipment. Signal Heads.

BS EN 12966-

1:2005+A1:20

Road vertical signs. Variable message traffic signs. Product
standard

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Designation

BS EN

Designation

Title

BS EN 12899-

1:2007

Fixed, vertical road traffic signs. Fixed signs.

9.2

Foundations, Pullboxes and Conduits

Main Contractor shall complete all civil works, including earthworks, grading, foundations, pullboxes
and conduits for the traffic. Civil work shall include installing conduits to the power source and the
handhole or pullbox outside the power source as part of this work specified in this section.

9.2.1

Description

Foundations and conduits for the traffic control system and Intelligent  transportation system (ITS)
shall be as shown on the Contract plans, as specified herein and included in the Bills of Quantities.
Work  shall  include,  but  not  by  way  of  limitation,  furnishing  and  installing  cast-in-place  concrete
foundations for:

•

traffic signal and ITS poles;

•

ITS gantries;

•

traffic signal controllers and artery master controllers;

•

field equipment cabinets;

•

changeover switch (automatic transfer switch);

•

uninterruptible power supply (UPS);

•

communications cabinets;

•

video surveillance system (VSS) camera poles;

•

pullboxes; and

•

concrete-encased and non concrete encased conduits

as  indicated  on  the  Contract  plans.  The  installation  shall  also  include  all  required  anchor  bolts,
conduit,  ground rods,  pullboxes,  manholes  and  interconnecting  concrete-encased  conduits  to the
foundations and to the detector loops and power source.

9.2.2

Materials

Materials to be furnished and installed for the traffic control system foundations, pullboxes and
conduit shall be as indicated on the Contract plans, as specified herein and as approved by the
Engineer

9.2.2.1

Approval of Materials

Within 90 days after award of the Contract and before work is performed, the Contractor shall submit
samples of all materials that will be used in this work for approval of the Engineer.

9.2.2.2

Conduit

PVC conduit used for conduit and ducts shall meet the requirements for PVC electrical conduit

specified in Section 10.4.3, Chapter 10, Lighting and Electrical Distribution Works, of these standard
specifications.

Galvanized metal conduit at pullboxes shall comply with the applicable clauses in Section 10.4.2,
Chapter 10, Lighting and Electrical Distribution Works, of these standard specifications.

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9.2.2.3

Concrete

All concrete for foundations, pullboxes and concrete-encased conduct and ducts shall comply with
the applicable requirements of Section 4.3 of Chapter 4, Concrete works, of these standard
specifications.

9.2.2.4

Covers and Frames

Contractor shall furnish and install watertight ductile iron covers and frames as indicated on the
Contract plans and as specified herein.

Covers and frames shall be ductile iron meeting the requirements for ductile iron covers and frames
specified in Article 12.3.2.3 of Chapter 12, Stormwater Drainage, of these standard specifications.
Rubber gasket seals shall be provided for watertightness and the covers shall be bolted to the frames
with countersunk stainless steel hex head cap screws.

Most covers and frames will be installed in non-traffic green or sidewalk areas and these shall be
medium duty. Covers and frames installed in paved traffic areas shall be heavy duty.

All covers or frames shall be identified with the words "T.C.S Traffic Control System" in both Arabic
and English cast into the surface of the ductile iron as approved by the Engineer.

All covers and frames shall be coated on all exposed surfaces with coat tar epoxy meeting the
requirements of Section 24.5 of Chapter 24, Painting.

Covers shall be equipped with cast-in lifting eyes, holes or other handling facilities and shall be made
in sections as required for larger sizes (1.2 m and larger in one direction) to facilitate removal and
lifting unless otherwise shown on the Contract plans or approved by the Engineer.

Contractor shall supply one prying and lifting bar of approved design for each 30 covers (minimum
of one tool for every type cover). Prying and lifting bars shall be of approved appropriate design to
match the different cover configurations.

Covers shall have two keyed locking devices, one on each end, meeting the requirements of Article
12.3.2.3 of Chapter 12, Stormwater Drainage, of these standard specifications, as directed by the
Engineer.

9.2.3

Construction Requirements

Construction and installation of the traffic control system foundations, pullboxes and conduits
(includes ducts) shall be as indicated on the Contract plans, as specified herein and as directed by
the Engineer.

9.2.3.1

General

Contractor shall furnish and install all traffic signal system and the VSS control system foundations,
pullboxes and conduits (also referred to as the traffic control system civil works), which consists of
concrete-encased  conduit,  manholes,  pullboxes,  junction  boxes,  concrete  foundations  for  traffic
signal poles, controllers and VSS Camera poles and provisions for VSS camera mountings under
bridge  structures  or  other  structures  e.g.  retaining  wall  structures  in  concrete  canyons,  where
indicated on the Contract plans and as included in the Bills of Quantities.  Work shall include, but not
by way of limitation, all labour, materials, tools, equipment and appurtenances.

The Design Consultant shall perform a horizontal and vertical clash analysis during the development
of the design to determine and resolve conflicts between the ITS infrastructure and the utilities. The
Contractor is responsible for identifying onsite conflicts between the ITS infrastructure and the
utilities. The Design Consultant and Contractor are responsible for resolving any conflicts between
the ITS infrastructure and the utilities, particularly if an ITS corridor has not been allocated within the
service reservation corridor.

Traffic signal system and the ITS layouts as shown on the Contract plans are schematic. Contractor
shall verify all information such as locations, specifications, construction restrictions, protection

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requirements and other data which shall be obtained by requesting the required information from the
Engineer who will forward the written request to the Owner.

Installation of the traffic signal system and ITS civil works shall include all excavation and backfilling,
all required foundations complete with anchor bolts, conduit as indicated on the Contract plans, and
all ancillary and related work.  Contractor shall verify the locations of the control system foundations,
the  sizes  of  the  controller  foundations,  the  sizes  of  pole  foundations  and  the  anchor  bolt  sizes,
locations,  and  orientation  for  all  foundations  with  the  manufacturer  and  the  Engineer  before
placement of any foundations.

The Engineer’s representative shall confirm the exact location of all

traffic signal system and ITS equipment on site with the Contractor prior to installation.

This work shall comply with the applicable Sections in the following Chapters of these Standard
Specifications:

•

Chapter 2, Earthworks

•

Chapter 4, Concrete Works

•

Chapter 11, Utilities

•

Chapter 12, Stormwater Drainage

9.2.3.2

Foundations

Foundations for the traffic signal system (various types

– traffic signal poles, mast arms, pedestrian

signal  pole/pylons,  and  free  right  turn  signal  poles),  traffic  violation  camera  poles,  VSS  system
(various types), traffic signal controller, ITS control cabinet, changeover switch, and UPS foundations
shall be as indicated on the Contract plans.  Number of anchor bolts, bolt locations, and anchor bolt
dimensions shall be verified by the Contractor, as specified in these Standard Specifications or in
the Particular Specifications.  Projecting portion of the anchor bolts and the nut and washer shall be
treated by hot-dip galvanizing.  Raceway or conduit in various types of foundations for traffic signal
and VSS support shall consist of PVC conduit or raceways with a bending radius as indicated on the
Contract plans.

All concrete for the traffic signal system (various types) and the ITS (various types) shall be cast-in-
place, Class C25/20. All concrete work shall comply with all applicable requirements of Chapter 4,
Concrete Works. Foundations shall be allowed to cure a minimum of 7 days before erecting poles,
cabinets, or traffic signal controllers.

All reinforcement steel in traffic signal system foundations and ITS system foundations shall be steel
reinforcement bars complying with the requirements of Chapter 5, Reinforcing Steel. Reinforcing
bars shall be uncoated plain deformed bars unless otherwise shown on the Contract plans.

Anchor bolts for the support poles shall comply with the requirements of ASTM A307, Grade A. The
anchor bolts shall be capable of supporting the traffic signal supports and signal heads with the
maximum bending moment. Bolts and nuts shall be hot-dip galvanized in accordance with ASTM
A153.

All foundations shall be furnished with an earth electrode complying with Article 10.14.10.3 of
Chapter 10, Lighting and Electrical Distribution Works, of these standard specifications. Type, size
and installation of the earth electrode shall comply with Section 10.14.10.3 of Chapter 10, unless
otherwise indicated on the Contract plans.

Holes for foundations shall be excavated to the dimensions required for construction. All excavating
and backfilling shall comply with the requirements of Section 2.4 and 2.5 of Chapter 2, Earthworks.
All unsuitable excavated materials shall be disposed of by the Contractor in accordance with Article
2.4.2.7, Disposal of unsuitable or excess material, of Chapter 2. Excavated materials that are
unsuitable shall not be used as backfill. All backfill shall be approved material compacted, in layers
not to exceed 15 cm, to at least 95 % of the material's maximum density in accordance with Section
2.5.3.2, Structural Backfill, of Chapter 2, Earthworks.

Numbers and dimensions of anchor bolts, diameter of bolt circles and sizing of base plates as
indicated on the Contract plans are for description purposes only and shall be subject to the approval

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of the Engineer. Before placing concrete for any foundation, the Contractor shall verify size, location
and related data of the foundation and anchor bolts with the Engineer.

PVC electrical raceways or conduit, of the size and bend radius indicated on the Contract plans,
shall be installed in the support foundations as indicated on the Contract plans and as directed by
the Engineer.

Anchor bolts, ground rods and PVC conduits (or raceways and ducts) shall be located securely in
position by the use of templates during the placing of foundation concrete.

a. Foundations for Traffic Signals, Type C and D

Contractor shall include the furnishing and installing of all materials required for the construction of
reinforced concrete foundations for traffic signals, Type C and D. Foundations shall be in
accordance with dimensions as indicated on the Contract plans and in accordance with these
Standard Specifications.

Number  of  anchor  bolts,  bolt  locations,  and  anchor  bolt  dimensions  shall  be  verified  by  the
Contractor,  as  specified  in  these  Standard  Specifications  or  in  the  Particular  Specifications.
Projecting portion of the anchor bolts and the nut and washer shall be treated by hot-dip galvanizing.
Raceway or conduit in traffic signal supports shall consist of PVC conduit or raceways with a bending
radius as indicated on the Contract plans.

Traffic signal foundations type C and D shall be drilled or bored in the manner, at the locations and
to the penetration or depth indicated on the Contract plans, as specified herein and as approved by
the Engineer. Foundation construction shall meet the applicable requirements of Chapter 17, Drilled
Piles, and as specified herein.

Prior to proceeding with any foundation work for traffic signals, type C and D supports, the Contractor
shall submit to the Engineer for approval, shop drawings, complete details, calculations for temporary
or permanent metal casings, equipment data, and related particulars concerning the completion of
the proposed traffic signal foundations, type C and D. Shop drawings shall also indicate the
proposed method of conduit installation in the foundation. Method of installation shall be subject to
approval of the Engineer.

Lengths indicated on the Contract plans are the estimated lengths to be required for the traffic signal
foundations, type C and D. Final lengths of foundations shall be approved by the Engineer based
upon actual conditions encountered in drilling or boring. Contractor shall make his own analysis of
the subsoil conditions and work that will be required to provide the drilled or bored concrete
foundation as specified.

All  traffic  signal  foundations,  type  C  and  D,  shall  be  cast-in-place  Class  C30/20  concrete.    All
concrete  work  shall  comply  with  the  applicable  requirements  of  Chapter  4,  Concrete  works.
Foundations  shall  be  allowed  to  cure  a  minimum  of  7  days  before  erecting  traffic  signals  on  the
foundations, type C and D.

All reinforcement steel in traffic signal foundations, type C and D, shall be in compliance with the
requirements of Chapter 5, Reinforcing Steel.

Anchor bolts for the support poles shall comply with the requirements of ASTM A307, Grade A.
Anchor bolts shall be capable of supporting the traffic signal supports and signal heads with the
maximum bending moment. Bolts and nuts shall be hot-dip galvanized in accordance with ASTM
A153.

All foundations for traffic signal and VSS supports shall be furnished with an earth electrode
complying with Article 10.14.10.3 of Chapter 10, of these standard specifications. The earth
electrode shall be located as near as practicable to the foundation, as directed by the Engineer. Size
of the earth electrode shall comply with Article 10.14.10.3 of Chapter 10, unless otherwise indicated
on the Contract plans.

Construction of all foundations, type C and D, for traffic signals shall comply with the following
requirements:

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1. All excavations for these foundations shall be made by drilling, boring or sinking a casing in

accordance with Chapter 17, Drilled Piles.

2. Contractor shall be responsible for testing all soil at the bearing levels indicated on the

Contract plans, and shall submit written reports to the Engineer as to the bearing capacity at
the depth indicated on the Contract plans and the coefficient of lateral subgrade reaction over
the proposed length of pile, and the acceptability of such soil to support the proposed
foundation and appurtenances.

3. Contractor shall make boreholes to depths, locations and frequencies as directed by the

Engineer.  Frequency  and  depth  of  the  boreholes  shall  depend  upon  the  soil  conditions
encountered and shall be at the discretion of the Engineer.  Total number of boreholes may
or may not be equal to the total number of traffic signal foundations, type C and D.  Report
on each borehole made shall include all information as directed by the Engineer and specified
in Article 2.1.3.2 of Chapter 2, Earthworks.

4. In the event unsuitable soil is encountered throughout the length indicated on the Contract

plans for the traffic signal foundations, type C and D, the Contractor shall advise the Engineer
as to the unsuitability of such soil materials. Contractor shall be responsible for designing the
extension of the depth of such traffic signal foundations to acceptable bearing.   Design of
such foundations shall be in accordance with the applicable requirements of the "Drilled Shaft
Manual", Volume II, Implementation Package 77-21, as published by the U.S. Department of
Transportation  Office  of  Research  and  Development,  Implementation  Division  HDV-22,
Washington,  D.C.  20590,  and  as  required  in  Chapter  17,  Drilled  Piles,  of  these  standard
specifications.

5. Contractor shall employ an independent chartered engineer or registered engineer as

approved by the Owner or the Engineer to design the increased depth of any such
foundations. Contractor shall submit design calculations and other data required by the
Engineer for review before proceeding with extending the depth of such foundations.

6. Need for additional foundation depth shall be at the sole discretion of the Engineer.
7. Contractor shall not proceed with further construction of such foundations until receiving

written directions from the Engineer. In the event the depths of the foundations are lowered
below the elevations indicated on the Contract plans and as approved by the Engineer, the
additional depths will be paid for as specified herein, or in the Particular Specifications, or the
Bills of Quantities.

8. All drilled foundations shall be installed in the presence of the Engineer. Engineer shall be

notified  in  writing  a  minimum  of  48  hours  in  advance  that  the  Contractor  is  commencing
operations  to  install  drilled  foundations  so  that  the  Engineer  can  be  present  during  the
foundation  work  on  a  daily  basis  throughout  the  installation  of  the  foundations.    All
foundations  shall  be  located to  the  lines  and  spacing  indicated  on the  Contract  plans  and
shall be drilled vertically with a tolerance of one in fifty.

9. In cases where the intended bottom of foundation is in water, bailing will not be permitted by

the Engineer.  Contractor shall take measures to ensure that the ground beneath the base of
the drilled or bored excavation is not disturbed by upward seepage pressure.  In such cases
the Contractor shall ensure the stability of the excavation base by maintaining a net positive
hydraulic head within the casing. Concrete shall be placed by tremie in accordance with the
requirements  of  Article  4.4.1.7  of  Chapter  4,  Concrete  Works,  of  these  Standard
Specifications, all subject to the approval of the Engineer.

10. Foundations shall be drilled with a casing being installed such that the bottom of the casing

is maintained below the bottom of the excavation at all times.  If approved by the Engineer,
the casing may be withdrawn as the concrete is placed provided the bottom of the casing is
maintained  below  the  top  of  the  concrete  while  the  concrete  is  being  placed  and  if  the
reinforcement, anchor bolts, and conduit can be maintained in their correct position during
the  casing  withdrawal.  Otherwise,  the  casing  must  be  left  permanently  in  place  unless
alternative construction methods are approved by the Engineer.

11. In the event that conditions, during drilling of holes for the foundations, indicate that a drilled

foundation is encountering an obstruction before reaching proper bearing stratum, the
Contractor shall bore or drill through the obstruction (after confirming that it is not an

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underground utility) or shall use whatever means are necessary to remove or circumvent the
obstruction, without additional cost to the Owner.

12. In the event the Contractor excavates to an elevation below that indicated on the Contract

plans or approved by the Engineer, the Contractor shall furnish and place Class C15 concrete
up to the bottom of the foundation as indicated on the Contract plans or as directed or
approved by the Engineer at no additional cost to the Owner.

13. Reinforcement steel cage shall be placed and secured symmetrically about the axis of the

foundation and shall be securely blocked to clear the sides of the casing.

14. Unless tremie methods for concrete placement are approved by the Engineer, the casing

shall be clean and free of water before the reinforcement steel and concrete are placed.

15. Drilling of holes for foundations, installation of reinforcement, placement of concrete and all

appurtenant work shall be carried out in a continuous, uninterrupted operation. Once a
foundation hole has been started, work shall be continuous so that concrete placement shall
be completed on the foundation without interruption of the Contractor's operation and so that
at no time shall work on a foundation be stopped or the drilled hole left open for any reason
unless specifically approved in writing by the Engineer.

16. Method of storing and handling of casings shall be such as to avoid damage to the casings.
17. All exposed parts of the concrete foundations extending above the natural or finished ground

line shall be given a Class 1 finish in accordance with Section 4.4.3 of Chapter 4, Concrete
works. Foundations, type C and D, for traffic signals shall not extend more than 100 mm
above the finished grade unless otherwise indicated on the Contract plans. Top of the
foundations shall be constructed level to provide a proper horizontal surface for erecting all
traffic signals.

18. PVC electrical raceway or conduit, of the size and bend radius as indicated on the Contract

plans, shall be installed in the support foundations as indicated on the Contract plans and as
directed by the Engineer.

19. Anchor bolts and PVC raceway or conduit shall be located securely in position during the

placing of foundation concrete.

9.2.3.3

Cable and Conduit (Direct Bury)

This work shall consist of constructing a trench for the accommodation of the electric cable or PVC
conduit (or ducts) and backfilling it at the locations indicated on the Contract plans.  Included is the
furnishing  of  the  backfill  materials  and  disposing  of  the  surplus  materials  all  in  accordance  with
Sections 2.4 and 2.5 of Chapter 2, Earthworks.  Trenches shall be excavated to a depth and width
as indicated on the Contract plans, but in no case shall the depth be less than 534 mm and the width
be less than 400 mm unless otherwise directed by the Engineer. All trench and backfill shall comply
with the requirements of Section 2.4 and other applicable Sections in Chapter 2, Earthworks.

Electric cable for the traffic controller shall be placed in the bottom of the trench and covered with
backfill material as directed by the Engineer.

Backfill material shall be thoroughly compacted to a density as required by Article 2.5.3.4,
Compacting embankments, of Chapter 2, Earthworks, and in such a manner as not to injure the
electric cable.

Method and type of equipment to be used in compacting the backfill material shall be approved by
the Engineer before any work is started.

Installation and handling of PVC conduit shall meet the additional requirements in Section 10.4.3 of
Chapter 10, Lighting and Electrical Distribution Works, as applicable.

9.2.3.4

Conduit (Concrete-encased)

This work shall consist of furnishing and installing PVC conduit (or ducts) concrete-encased to
provide and permit the future routing, by others, of electric cable required for the traffic control system
under the roadway.

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Ducts shall be encased in Class C25/20 concrete complying with the applicable Sections in Chapter
4, Concrete Works. Installation of conduits shall be as indicated on the Contract plans and as
required in Section 10.12.3 of Chapter 10.

All excavating and backfilling shall be in accordance with applicable requirements of Sections 2.4
and 2.5 of Chapter 2, Earthworks.

Centreline of the duct shall be as indicated on the Contract plans.

9.2.3.5

Pullboxes (Manholes)

Contractor shall furnish and install pullboxes (manholes) of the various types for the  traffic control
system  as  indicated  on  the  Contract  plans,  as  specified  herein  and  as  directed  by  the  Engineer.
Locations of pullboxes shall be determined on the site to suit the existing conditions.  Final locations
shall be subject to the approval of the Engineer.

All excavating and backfilling shall comply with the applicable requirements of Sections 2.4 and 2.5
of Chapter 2, Earthworks. Pullboxes shall be reinforced, cast-in-situ Class C25 concrete complying
with the dimensions and details indicated on the Contract plans. Concrete work shall meet the
applicable requirements of Chapter 4, Concrete Works. Underside of the bottom slab and external
faces of concrete walls shall be protected with Type A membrane complying with the applicable
requirements of Section 28.2 of Chapter 28, Waterproofing.

All covers shall be of the dimensions required to fit the respective pullboxes as shown on the Contract
plans. Pullbox covers and frames shall be installed level and square, cast-in-situ with the concrete
work for the upper portion of the pullbox, or as shown on the Contract plans.  All covers in traffic
areas shall be checked to ensure that they are non-rocking and watertight.  Contractor shall take any
measures approved by the Engineer, if the covers and/or frames need to be modified to be non-
rocking and watertight.

Installation of pull boxes shall meet the applicable requirements of 12.3.4, Pull boxes, service
chambers and vaults and as specified herein

The conduits and pullboxes when completed shall be tested to the satisfaction of the Engineer for
watertightness, straightness and continuity. The method of testing shall be determined by the
Engineer. No additional payment will be made by the Owner for testing.

All pullboxes for the interconnection conduits installed within the service reservations shall be spaced
a maximum of 100 m on centre unless otherwise indicated on the Contract plans or specified in the
Particular Specifications.

Installation of metal conduit at pullboxes shall be in accordance with Section 10.12.4 of Chapter 10.

RAFFIC CONTROL

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9.3

Pedestrian Poles

9.3.1

Description

Contractor shall replace existing pedestrian pylons where shown on the Contract plans and as
directed by the Engineer. Existing pedestrian pylons shall not be reinstated after removal. Pedestrian
pylons shall not be installed at new signalised intersections or midblock pedestrian crossings.

All pedestrian poles shall be complete, in place, with all components as specified, as indicated on
the Contract plans and as required for the installation. Pedestrian poles shall be of the type as
indicated on the Contract plans.

9.3.2

Materials

Pedestrian poles shall be as indicated on the Contract plans and as specified herein.

Pedestrian poles shall include, but not by way of limitation, electrical wiring and work within the poles
to the handhole in the supporting base or post, and all appurtenances and incidentals required for
the installation of the poles.  All pedestrian poles shall be complete with all electrical lighting fixtures,
lamps, ballasts, and internal wiring.  Further, each pedestrian pole shall be provided with an electrical
protective device such as a fuse.  Protective device shall be located in a suitable, accessible location
in the pedestrian pole.

Contractor shall submit to the Engineer for approval, detailed shop drawings, material samples and
such other data as may be required by the Engineer for the pedestrian poles, in accordance with
Section 1.15, Submittal Procedures, of Chapter 1, General Requirements. Accompanying the shop
drawings, the Contractor shall submit colour samples on typical shapes for approval by the Engineer
as well as certificates that the colour finish meets Specification requirements.

Based upon the data as approved by the Engineer, and prior to production of all units, the Contractor
shall furnish and install a complete, operative and detailed prototype of the pedestrian pole for
approval by the Owner as confirmed by the Engineer. No pedestrian pole shall be fabricated and
delivered before the prototype has been approved by the Owner.

All  materials  shall  be  as  indicated  on  the  Contract  plans  and  as  specified.    All  metal  shall  be  of
suitable thickness and reinforced as required to ensure adequate structural strength and to prevent
buckling, warping and/or denting.  Pedestrian poles and pylons shall be internally illuminated with
cut out messages and other signs if the type requires it, as shown on the  Contract plans, and as
directed by the Engineer.  Locks on the access doors shall be approved by the Owner and shall be
master keyed as directed by the Engineer or Owner.  All keys shall be delivered to the Engineer to
be forwarded to the Owner.  All fasteners shall be concealed.

Materials of all parts used in the pedestrian pole shall be new and shall be the best of their respective
kind  and  most  suitable  for  the  local  climatic  conditions,  thus  withstanding  the  variations  of
temperature and other prevailing conditions without distortion or deterioration of any part of the pylon.
In every case where a standard has been established for a particular type of material in question,
the material shall comply with the provisions set forth in the standard.  Equipment included in these
Specifications shall be so manufactured as to facilitate easy and proper erection and maintenance.
Design of all equipment shall ensure satisfactory operation under the site conditions mentioned.

Pedestrian Poles shall be fabricated to comply with the requirements of the Contract plans and as
specified herein. All members and plates shall be fabricated with eased or rounded corners as
detailed. All assemblies shall be made by full welding in accordance with American Welding Society
standards AWS with welds finished smooth and flush with adjacent surfaces.

Removable base plate enclosure boxes shall be as detailed, fabricated of 6 mm thick ASTM A36
steel, all welded construction, with welds ground flush and smooth. Enclosure boxes shall be
galvanized, prime and finish painted as specified herein. Stainless steel fasteners shall be flat,
phillips head, countersunk machine screws.

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Aluminium members of the pylon shall be solid, sized, and formed as indicated on the Contract plans.
Aluminium shall comply with the values stated in ASTM B221 and B209.  Bar shapes shall be square
cornered,  extruded  alloy  6061-T651  and/or  6063-T5.    Aluminium  plate  shall  be  alloy  6061-T651.
Aluminium  welding  alloy  shall  be  the  type  best  suited,  and  as  recommended  by  the  aluminium
manufacturer.  All base plate fastening hardware shall be stainless steel.  Bolts shall comply with
ASTM A193, Grade B8, Class 2; nuts shall comply with ASTM A194, Grade 8; and flat washers with
ASTM A240, Type 302.

After compete fabrication, the pedestrian pole units specified to receive colour coating shall be
factory chemically pre-treated, then receive a thermocured inhibitive primer, then a factory applied
fluoropolymer resin colour coating complying with the requirements of AAMA 2605, followed by a
clear, transparent protective topcoat.

Finish colour coating shall be matte finish and shall match the AAMA dark bronze anodized finish
colour. Any surfaces or colour coating damaged during delivery shall be repaired or recoated to the
satisfaction of the Engineer.

9.3.3

Construction Requirements

All signal heads, control mechanisms, cables, outside conduit not indicated on the Contract plans,
appurtenant work and final hook-up of the poles will be by a specialist subcontractor pre-approved
by the Owner.

Contractor shall include complete furnishing and installing of the pedestrian poles as included in the
Bills of Quantities. Work for the pedestrian pole shall include all materials, labour, tools, equipment
and appurtenances to complete the Pedestrian Pole installation. Holes shall be provided in the base
plate to allow conduits to pass through same. Handholes shall be provided in the pedestrian poles
to allow connection of all wiring.

Pedestrian poles shall be provided with a fuse of adequate capacity in the base. Electrical wiring
within the pedestrian poles shall be earthed and bonded in accordance with the requirements of
Section 10.11.10, Grounding and Bonding, of Chapter 10.

Contractor shall verify location and size of conduit, height of conduit above top of foundation and
similar details with the Engineer and the manufacturer before proceeding with this work.

All conduit, cable and electrical wiring to the poles shall be included by the Contractor as a part of
this Item and shall comply with the requirements specified in the applicable clauses of Chapter 10,
Lighting and Electrical Distribution Works.

All exposed surfaces and message panels shall be suitably cleaned before approval by the Engineer
and/or acceptance by the Owner.

9.4

Existing and Temporary Traffic Signals

9.4.1

Description

Maintenance, removal and disposal of the existing traffic signals and existing traffic signal controllers
shall be as indicated on the  Contract plans, as specified herein and as directed by the Engineer.
This  section  applies  only  to  temporary  signals  and  those  existing  traffic  signals  that  are  to  be
removed/replaced by the Contractor.  All other traffic signals to remain within the contract limits will
be maintained by the Owner.

9.4.2

Materials

9.4.2.1

General

Contractor shall assume full maintenance responsibility for any temporary signals and for existing
traffic  signals  and  controllers  that  are  to  be  removed  and/or  replaced  within  the  contract  limits.
Contractor  shall  obtain  all  information  from  examination  of  the  existing  installations  or  from  the
installers of the existing traffic signals and controllers.  Maintenance shall include, but not by way of

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limitation, the power to the units, controls for units, relamping as required, repair and replacement of
damaged units or other maintenance as required for the continued operation of such existing units.
Maintenance shall be round-the-clock (24 hours) and not during working hours only - necessary staff
shall be on duty for this purpose till the need for the temporary signals is not required, as directed by
the Engineer.

9.4.2.2

Technical Requirements

Temporary signal assembly shall have the following capabilities:

1. All temporary traffic signal controllers shall be similar. When there is more than one

temporary signal in the project site, a master-slave controller concept shall be implemented.

2. All vehicular, pedestrian signal heads, and countdown counters shall comply with their

respective specification mentioned elsewhere in these specifications.

3. It shall be installed on prefabricated concrete blocks as shown on the Contract plans or on

other means as approved by the Engineer.

4. It shall include wireless communication capability in order to send/receive data to/from the

nearby central control unit (master controller) up to 150 m. Wireless band shall fit within the
license-free band available at that location.

5. It shall include a GPRS module for distant operations greater than 150 m.
6. System shall have MS-windows based software to program the signal timing plans. Timing

plans shall support multiple times of the day and day of the week.

7. Contractor shall submit for review and approval signal timing plans including switching

make any necessary changes to the signal timing plans as directed by the Engineer.

8. It shall support and control up to 32 groups.
9. It shall support and include vehicle sensors for sub road conditions.
10. It shall support and pedestrian signal applications.
11. It shall include and support 300 mm LED countdown clocks.
12. It shall include solar power supply kit according to the number of signal heads on each pole

assembly as follows:

20 w for each signal head.

ii.

20 w for each count down counter

iii.

Battery shall not be less than 150 Ampere-hour for 150 w assemblies and shall not
be less than 250 Ampere-hour for 250 w assemblies.

iv.

Battery shall last for at least 3 continuous days at full capacity when solar supply is
not available.

9.4.3

Construction Requirements

Contractor shall remove, clean, load, transport, unload, protect and store the existing traffic signals
and controllers as indicated on the Contract plans, as specified herein and as approved by the
Engineer.

Contractor shall provide all labour, tools, equipment and accessories to carefully remove the existing
traffic signals, poles, controllers, foundations, and cables and to clean them, transport, unload and
place in the Owners storeyards, as designated by the Engineer.

Contractor  shall  exercise  care  while  removing  the  existing  traffic  signals,  poles,  controllers,
foundations,  cables  and associated  equipment  so  as  not to  damage  any  materials  or  equipment.
Any materials or equipment damaged while removing, handling or transporting shall be replaced with
new material or equipment or repaired as approved by the Engineer.  All signal heads and similar
equipment removed shall be cleaned, packed, protected and carted as approved by the Engineer.
All traffic signals, poles, controllers and associated equipment shall be loaded, transported, unloaded
and placed in the Owners store yards, as directed by the Engineer.

All traffic signal poles removed shall be cleaned of all concrete and deleterious material and suitably
supported during handling and transporting and supported by blocking or other approved means
when poles are placed in storage where directed by the Engineer or the Department. All poles shall
be covered with an approved protective cover securely anchored or tied in place.

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Contractor shall completely remove all foundations for traffic signal poles and controllers.  Resulting
excavation shall be backfilled with borrow material, as approved by the Engineer, in accordance with
the applicable requirements of Section 2.5 of Chapter 2, Earthworks.  Where backfilling occurs under
pavement,  walks,  future  pavement,  or  similar  areas,  the  borrow  material  shall  be  placed  and
compacted in accordance with Section 2.5 of Chapter 2.

Prior to commencing removal of existing traffic signals and associated controllers and wiring or
cables, or installation of temporary signals, the Contractor shall make all necessary arrangements
with the electrical authority and include, as a part of the work of this Item, all work required to remove
and dispose of the electric service to existing traffic signal controllers from the point designated by
the authority or supply/remove electric service to temporary signals.

Removal of electric service to the existing traffic signals and controllers shall not commence until all
temporary detours are in operation and approved by the Engineer.

9.5

Traffic Signal System

9.5.1

Description

These  Standard  Specifications  cover  descriptions  and  requirements  of  the  components  and
materials  forming  part of  the  traffic  signal  system, to  include  all  components,  items,  systems  and
sub-systems supplied and/or implemented under this Contract shall strictly comply with requirements
and specifications stipulated in these documents.  System shall be compatible to the existing system
and operate in harmony with the existing system.

9.5.1.1

Subcontractor

All  non-civil  works  required  under  this  section  shall  be  executed  by  an  Owner  pre-approved
subcontractor (from herein referred to as Subcontractor).  Subcontractor shall be a well established
traffic control systems supplier and shall have carried out a number of works of similar nature and
magnitude  as  this  Contract.    Subcontractor  shall  have  previous  experience  in  the  hardware,
software,  principles  and operational  aspects  of  a  computerized  urban traffic  control  systems,  and
shall  be  technically  capable  of  integrating  the  traffic  signal  controllers  to  be  installed  under  this
Contract with the existing traffic computer control system such that full compatibility is ensured.

Subcontractor shall have the necessary experience and resources to furnish, install, operate and
maintain all components of the traffic control system such as signal poles and mast arms, vehicular
and pedestrian signals, pedestrian pushbuttons and inductive loop detectors, automatic transfer dual
power supply panels, local and master traffic signal controllers, audio and data communications
system, cabling and wiring, and all other components as specified in the Particular Specifications.

Unit rates entered in the Bill of Quantities must include for all work as specified plus all on costs for
the main Contractor's work, attendance, overhead and profit. Any other items necessary for the
satisfactory completion of the works but not specifically mentioned in the Contract documents will be
considered as subsidiary obligations to this Contract.

Main Contractor shall be responsible for the scheduling of the traffic signal works so that all works
are completed by the authorized contract completion date.

9.5.1.2

Subcontractor’s Scope-of-works

Scope of work for the traffic control system subcontractor shall cover the following works and
services:

1. Supply and Installation of signalized intersections, arterial progression (if required), and

computer control as shown on the relevant Contract plans and in the Particular
Specifications.

2. Maintenance of all installations as specified in the Particular Specifications.

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9.5.1.3

System Overview

Traffic control system provides effective and progressive traffic flow conditions in the project area by
utilizing the latest hardware and software, and up-to-date traffic engineering principles and
procedures. Traffic system components provided under this sub-contract shall be integrated with
the existing traffic control system as may exist in the project area, by providing safe, effective and
progressive traffic flow conditions.

Hardware and software to be supplied and installed as part of this Project should be operationally
compatible with any existing traffic control system. System to be provided as part of this Project
shall consist of the following features as otherwise required in the Particular Specifications and
approved by the Engineer:

1. Detection equipment shall be provided including vehicle actuation detectors, pedestrian

actuation  detectors  and  vehicle  system  detectors.  Actuation  detectors  shall  be  used  to
identify  demands,  to  assign  phases  and  to  provide  information  to  control  timing  interval
lengths.    All  vehicle  loops  shall  be  individually  connected  to  the  traffic  signal  controller.
System  detectors  shall  provide  vehicle  volume  and  lane  occupancy  information  to  the
existing central computer in a format operationally recognizable by the existing hardware
and software of the central computer.

2. Poles, mast arms, vehicular and pedestrian signals shall be provided to give specific and

clear indications to motorists and pedestrians of their rights-of-way.

3. Local intersection microprocessor controllers with planning, timing, interconnection,

coordination and emergency pre-emption equipment shall be provided to control and direct
traffic flow at intersections.  Each intersection shall be capable of stand-alone operation,
subsystem interconnection and computer controlled coordination from the existing central
computer. Each controller shall be capable of pre-timed, semi-actuated and fully actuated
operation.  Mode of operation shall be manually and remotely selectable at the controller
without the use of special tools or equipment.  Automatic transfer dual power supply panels
shall  be  provided  to  supply  power  for  the  traffic  signalling  related  equipment  at  an
intersection.

4. Artery master controller may not be currently implemented in the area. Contractor shall

implement an artery master controller as defined in these specifications, as directed by the
Engineer  and  approved  by  the  Owner.  Artery  master  microprocessor  controller  shall  be
provided to supervise and maintain interconnection and progressive traffic flow among the
designated  intersections.    Artery  master  controller  shall  accept  information  from  system
detectors and shall utilize such information to vary cycle lengths and offsets.  Artery master
microprocessor  controller  shall  be  interconnected  to  the  local  intersection  traffic  signal
controllers  by  means  of  communication  cables  routed  through  concrete  encased  PVC
conduits.

5. Audio transmission equipment which will provide voice communications between the

central computer control centre and the designated local intersection controller cabinets
shall be provided. Format and protocol of this audio communication system should be fully
compatible with the existing audio communication system.

6. A data transmission system (communications system) shall be provided which shall carry

commands from the central traffic control computer to the arterial master controllers and
the local intersection traffic signal controller.  This system shall carry controller status and
traffic surveillance data from the local intersection traffic signal controllers to central traffic
control  computer.    Data  transmission  system  shall  be  fully  compatible  and  able  to  be
integrated with the existing central computer system and shall be connected to the central
computer  with  cables.    Cable  shall  be  supplied  and  installed  by  the  Subcontractor  and
Contractor  in  concrete  encased  PVC  conduits.    Data  transmission  system  shall  also  be
designed such that no more than four, 100 mm diameter ducts shall be used by the cable
on any given cable run.

7. Local intersection traffic signal controllers shall be placed under the central computer

control. All necessary software programming and additional hardware installation to the

YSTEM

central computer control system shall be done such that full compatibility and integration
with the existing control programs of the central computer control system is ensured.

9.5.2

Materials

It is of great importance that all systems and sub-systems are standard products of the same
manufacturer to ensure and guarantee proper interface and smooth operation of the complete
system.

Subcontractor/Contractor shall submit an undertaking to guarantee the availability of the spare parts
for all systems and sub-systems covered by his offer for a period of 10 years from the date of final
handing-over of the system.

9.5.2.1

Standards and Codes

Traffic control equipment furnished and installed shall meet the requirements of the internationally
known standards and governing codes of the regulating authority. Specific standards and codes
used as a guide for the design are as follows:

AASHTO

American Association of State Highway and Transportation Officials (USA)

ASTM

American Society for Testing Materials (USA)

BSS

British Standard Specifications (UK)

CEE

International Commission on Rules for the Approval of Electrical Equipment

IEC

International Electrotechnical Commission

IMSA

International Municipal Signal Association

IPCEA

Insulated Power Cable Engineers Association (USA)

ITE

Institute of Transportation Engineers

NEMA

National Electrical Manufacturers Association (USA)

Underwriters Laboratories, Inc. (USA)

NTCIP

National Transportation Communications for Intelligent Transportation System

Protocol

9.5.2.2

Definitions and Abbreviations

Definitions and abbreviations used within this specification are as follows:

Actuation - shall mean the operation of a detector for placing a call or operation of an electrical circuit
for transferring the right-of-way from one phase to another.

Cabinet - an outdoor enclosure for housing the controller and its associated equipment.

Detectors - are electrical devices used for indicating the approach of traffic to an intersection. And
the provision of traffic counts, speeds, occupancy, queue, and classification data at per-lane and
aggregate basis. Types of detectors are in-roadway (inductive loop) and over-roadway (microwave
radar) detectors.

Flasher unit - a complete electrical mechanism for flashing traffic signals.

Interval - the part of signal cycle during which signal indications do not change.

Phase - the right-of-way and clearance interval in a cycle assigned to a movement or any
combination of movements.

Signal face - a combination of signal sections each capable of displaying its indication in any one
direction.

Signal head - an assembly containing one or more signal faces.

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Traffic actuated controller - a timing device used for the control of traffic signal lights in which the
intervals or phases are varied in accordance with demands of traffic as registered by the vehicle
actuation of detector.

Master controller - a coordinating unit or units that governs 2 to 10 individual intersection controllers.

9.5.2.3

Submittals

Materials of all parts used in the traffic control system shall be new and the best of their respective
kind and the most suitable for working under the weather and site conditions set out in these
Specifications, thus withstanding the variations of temperatures and other prevailing conditions
without distortion or deterioration of any part of the traffic control system.

Equipment included in these Specifications shall be so manufactured as to facilitate easy and proper
erection and maintenance. Design of all equipment shall ensure satisfactory operation under the
weather and site conditions mentioned.

In general, dissimilar metals in contact shall be avoided. When, however, they have to be used, the
contact points of dissimilar metals shall be adequately protected against galvanic corrosion.

It is the intent of these Specifications that the Subcontractor shall be the manufacturer and/or supplier
of the main items of the traffic control system meeting the requirements of the  Specifications and
Contract plans.  All Subcontractor submittals required to be submitted to the Engineer, shall be made
through the Contractor.

Subcontractor shall submit for review and approval a complete list of equipment, and the associated
model numbers and materials that are proposed for use. List shall include descriptive literature,
technical details and drawings sufficient to fully describe and explain the specified components of
the traffic control system and its integration with the existing traffic system. Where specified herein
or when directed by the Engineer, samples of any of the materials and equipment proposed for use
shall be submitted for review and approval.

It shall be the responsibility of the Contractor to ensure that the performance of the Subcontractor
complies with all requirements specified herein, and that all items supplied for use in this Project
comply with the Specifications and approval of the Engineer. Contractor shall ensure that the
Subcontractor does not deliver or install any equipment until the material submittal and applicable
shop drawing has been approved by the Engineer.

This specification governs the procedures for documentation and approval of all materials and
equipment proposed for use on this Project.

Subcontractor shall be responsible for the availability of the signal equipment and to ensure that all
equipment shall be in strict adherence to the Specification, Contract plans and approved shop
drawings.

All costs of work and materials required for satisfying these specifications shall be included in the
Bill of Quantities under which the subject intersection or interchange type or material equipment shall
be paid and no additional compensation will be allowed the Subcontractor for any incidental costs
that may occur in fulfilling the requirements of the Contract Documents.

Subcontractor shall comply with the following requirements for the control of traffic signal materials.

a. Within 30 days after the award of Contract and before work is performed, the Subcontractor

shall submit the following for approval by the Engineer:

1. Complete descriptive literatures, wiring diagrams and instruction drawings and

specifications of the traffic signal equipment that will be installed in accordance with the
Contract.

2. Complete shop drawings of the mast arm assemblies and poles, showing in detail the

fabrication thereof and the description of any materials used in the fabrication, anchor
bolts and reinforcing materials.

3. Samples of all conduit and cable and sample of each type of cable splices that will be

used in the work.

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4. All the above items shall be collected by the Contractor and submitted to the Engineer

at the same time.

b. Subcontractor shall provide samples and/or prototypes of all equipment, and components

and parts thereof to the Engineer for his review and approval. Subcontractor shall not start
the supply, procurement, manufacturing and/or assembly of any equipment, components
and/or parts, until after the Engineer's approval of the samples and/or prototypes.

Engineer's

approval

such

samples

and/or

prototypes

shall

not

relieve

the

Subcontractor/Contractor from his responsibilities of equipment performance under this Contract.

c. Owner and/or Engineer shall have the right to inspect any or all equipment, components

and/or parts of the traffic control system during its manufacture, preparation and/or assembly
at the

manufacture’s plant and/or Subcontractor's home plant and/or at his local facilities.

For  this  purpose the  Subcontractor  shall  notify the  Owner  in  writing  at  least  two  weeks  in
advance of the commencement of such manufacture, preparation and/or assembly.  If the
Owner  elects to  use  his  right  of  inspection,  no manufactured,  prepared and/or  assembled
equipment,  component,  and/or  part  shall  be  shipped  to  the  job  site  without  bearing  the
inspection approval tag of the Owner or Engineer.

d. Materials and signal equipment not complying with the above requirements that have been

installed on the job will be done at the Subcontractor's own risk and may be subject to removal
and disposal at the Subcontractor's expense.

e. Subcontractor shall be responsible for all commitments for the supply of materials and signal

equipment so that he can complete the job within the specified time of the Contract. Delays
in receipt of materials and signal equipment will not be considered as a valid reason for
extension of time.

f. Subcontractor shall be responsible for the assembly and testing of the traffic controller

system to make the system operational to the satisfaction of the Engineer.

g. All equipment, components and parts of the traffic control system shall continuously operate

in satisfactory condition for one month on the job site before they will be conditionally
accepted by the Engineer. Engineer shall be the sole judge as to whether the equipment has
operated in satisfactory condition.

h. Subcontractor shall be responsible for the maintenance and repair work on the signal

controller and associated equipment until final handover.

9.5.2.4

Conduit

All necessary conduits and pull boxes for the traffic system shall be supplied and installed in
accordance with Section 9.2.

9.5.2.5

Electric, Communications and Audio Transmission
(Telephone) Cable

Electric, communications, and audio transmission cables shall be rated 600 volts minimum and
comply with the following requirements:

1. Conductors. Conductors shall be of soft copper, solid or stranded. Solid conductors shall

meet the requirements of ASTM B3

or B189. Stranded conductors shall meet the

requirements of ASTM B8 or B33.

2. Insulation and jacket. Electric cables shall be protected with either one of the following

combinations of insulation and jacket. The average thickness of the jacket shall be as shown
in Table 9-3, and the average thickness of the insulation shall be as shown in Table 9-4, with
a minimum thickness 90 % thereof in each case.

Abu Dhabi, United Arab Emirates. STANDARD CONSTRUCTION SPECIFICATIONS (PART 1 - ROADS, Second Edition 2020) - page 50