Standard Specifications for Road, Bridge, and Municipal Construction 2020 (M 41-10)

Page 9-226

Illumination, Signal, Electrical

A means of disconnecting all wiring entering the panel shall be provided. The
disconnect shall include a means to jumper detection calls when the display
panel is disconnected. All switches on the panel shall be marked with its
associated Plan detector number. All markers shall be permanent.

8. Insulated terminal blocks of sufficient number to provide a termination for all field

wiring. A minimum of 12 spare terminals shall be provided. Field wire connection
terminal blocks shall be 600 volt, heavy duty, barrier type, except loop detector lead-
ins, which may be 300 volt. The 600 volt type terminal strips shall be provided with
a field-side and a control-side connector separated by a marker strip. The 300 volt
type shall have a marker strip, installed on the right side of vertical terminal strips
or below horizontal terminal strips. The marker strip shall bear the circuit number
indicated in the Plans and shall be engraved. Each connector shall be a screw type
with No. 8 post capable of accepting no less than three 12 AWG wires fitted with
spade tips.

9. A vent fan with adjustable thermostat. The minimum CFM rating of the fan shall

exceed three times the cabinet volume.

10. All wiring within the cabinet, exclusive of wiring installed by the signal controller

manufacturer, shall have insulation conforming to the requirements of

Section

9-29.3

. Cabinet wiring shall be trimmed to eliminate all slack and shall be laced or

bound together with nylon wraps or equivalent. All terminals, shall be numbered and
permanently identified with PVC or polyolefin wire marking sleeve consistent with
the cabinet wiring diagram provided by the signal controller manufacturer and the
Contract. The cabinet will be completely wired so that the only requirement to make
a field location completely operational is to attach field power and ground wiring.
Internal cabinet wiring shall not utilize the field side connections of the terminal strip
intended for termination of field wires.

11. Cabinet wiring diagram and component wiring diagrams meeting the requirements

Section 9-29.13(7)

shall be furnished with each cabinet. Each cabinet shall

be equipped with a, shelf mounted roll out drawer mounted directly below the
controller to house one or more cabinet wiring diagrams. The cabinet wiring diagram
shall indicate and identify all wire terminations, all plug connectors, and the locations
of all equipment in the cabinet. Included in the diagram shall be an intersection
sketch identifying all heads, detectors, and push buttons; and a phase diagram.

12. Each vehicle detector amplifier, video detection output channel pedestrian call

isolation unit, phase selector, discriminator, and load switch shall be identified with
semi-permanent stick-on type label. The following information shall be included:
a. Vehicle Detector Amplifier Channel

i. Loop number
ii. Assigned phase(s)

b. Ped Call Isolation Unit

i. Push button number
ii. Assigned phase(s)

Illumination, Signal, Electrical

9-29

c. Load Switches

i. Signal head number
ii. Assigned phase(s)

d. Phase Selectors

i. Circuit Letter
ii. Phase(s) called

The label shall be placed on the face of the unit. It shall not block any switch, light, or
operational words on the unit. The lettering on this label shall be neat, legible, and easily
read from a distance of approximately 6-feet.

9-29.13(10)B Auxiliary Equipment for Type 170E, 2070 Assemblies

The following requirements apply to required auxiliary equipment furnished with Type
170E, 170E-HC-11 and 2070 controllers:
1. Flashers, flash transfer relays, conflict monitor, AC isolators, DC isolators,

discriminator modules, program modules, modem modules, breakers, buses, police
panel switches, receptacle requirement, vent fan and auxiliary control panel switches
shall conform to the requirements noted in the TEES.

2. Flashing operation shall conform to

Section 9-29.13(5)

, except the 6-second

flash period described in Item 2 of that section will not be required. Emergency
preemption shall conform to

Section 9-29.13(6)

3. Input and output terminals shall be installed with a marking strip with field wire

numbers noted in the Contract embossed on the strip. All cabinet and field
conductor shall have a PVC or polyolefin wire marking sleeve installed, matching the
input and output terminals above. Marking on sleeves shall be embossed or type
written.

4. The input panel terminal blocks TB 2 through TB 9 and associated cable to the input

files as described in the TEES shall be provided in all control assemblies.

5. Supplemental load resistor, not less than 2000 ohms and not greater than

5000 ohms not to exceed 10 watts per monitored circuit, shall be provided to
prevent conflict monitor actuation caused by dimming or lamp burn-out.

An individual supplemental load resistor shall be installed within the output file, and
shall be installed on each of the following terminal circuits:
FT1-105 (SP 4P-Y)
FT2-117 (SP 3-Y)
FT3-126 (SP 1-Y)
FT1-111 (SP 8P-Y)
FT2-118 (SP 3-G)
FT3-127 (SP 1-G)

FT2-114 (SP 2P-Y)
FT2-123 (SP 7-Y)
FT3-132 (SP 5-Y)
FT2-120 (SP 6P-Y)
FT2-124 (SP 7-G)
FT3-133 (SP 5-G)

6. Load switches of sufficient quantity to fully populate the output files shall conform

to TEES and shall have indicator lights on input and output circuits.

Page 9-228

Illumination, Signal, Electrical

7. A detection panel, which shall be constructed as a single unit. Detector switches

with separate operate, test, and off positions shall be provided for each field
detector input circuit. A high intensity light emitting diode (LED) shall be provided
for each switch. The lamp shall energize upon vehicle, pedestrian or test switch
actuation. The test switch shall provide a spring loaded momentary contact that will
place a call into the controller. When in the OFF position, respective detector circuits
will be disconnected. In the operate position, each respective detector circuit shall
operate normally. Switches shall be provided on the panel with labels and functions
as follows:
a. Display On – Detector indicator lights shall operate consistent with their

respective switches.

b. Display Off – Detector indicator lights shall be de-energized.

A means of disconnecting all wiring entering the panel shall be provided. The
disconnect shall include a means to jumper detection calls when the display panel
is disconnected. All switches on the panel shall be marked with its associated Plan
detector number. All markers shall be permanent.

8. A “Detector Termination and Interface Panel” shall be provided. When viewing the

cabinet from the back, the panel shall be located on the upper left hand side of the
cabinet. The panel shall be electrically located between the “detection Panel” and the
C-1 connector. The panel shall utilize insulated terminal blocks and each connector
shall be a screw type with post.

9. Each switchpack socket shall have pin 11 common to Neutral.
10. The AC input Service Panel Assembly (SPA), line voltage filter, transient surge

protection and all neutral bus bars and equipment ground bus bars shall be on the
right side of the cabinet, mounted no more that 18 inches from the bottom of the
cabinet when viewed from the rear, and meet the requirements described in TEES.

11. The PED yellow terminals on the CMU edge connector shall be extended with a

2 foot wire, coiled, heat shrink tipped and labeled for the correct corresponding
terminal as CH-13Y/CMU-8, CH-14Y/CMU-11, CH-15Y/CMU-K, CH-16Y/CMU-N.

12. An “Absence of Red Programming Assembly” shall be provided. There shall be

provided on the back panel of the output file, 17 accessible jumper plug attachment
areas, made up of three male pins per position (one, for each conflict monitor
channel and one for red enable function). Each jumper plug shall be a two position
connector, It shall be possible, by inserting and positioning one of the 16 connectors
on the right two pins on the monitor board, to apply 120 VAC into a corresponding
channel of the conflict monitor red channels. The connection between the red
monitor board and the conflict monitor shall be accomplished via a 20 pin ribbon
cable and the industry standard P-20 connector that attaches on the front panel of
the monitor. It shall be possible, by inserting and positioning one of the 16 jumper
plugs on the two left pins on the monitor board, to enable the corresponding
channel to monitor for red fault by the conflict monitor. There shall be installed on
the red monitor board a red fail monitor disable function that controls the 120 VAC
red enable signal into the conflict monitor. During stop-and –go operation, 120VAC

Illumination, Signal, Electrical

9-29

is sent via pin #20 on the P20 connector to enable red failure monitoring on the
conflict monitor by having the connector moved to the side labeled “Red Enable”.
If this is disengaged by moving the connector to the side labeled “Red Relay”, then
120VAC is removed from pin #20, and the conflict monitor will no longer monitor for
red fail faults. The red enable function will also be wired such that if the traffic signal
is in cabinet flash, then there will be no voltage on pin #20, and the conflict monitor
will not monitor for red fail faults.

13. Each cabinet shall be provided with at least 20 empty neutral connections to

accommodate field wiring. The neutral bus bars shall be of the style in which a lug is
not needed to be applied to the neutral field wire(s). All of the neutral bars shall be
secured in accordance with the TEES. All neutral bars shall be at the same electrical
potential.

14. The main breaker on the SPA shall be provided with a cover to prevent accidental

tripping. The cover shall be removable and replaceable without the use of tools.

15. Equipment Branch Breaker –The duplex receptacle on the rear of either PDA #2L or

3L shall be wired in parallel with the ground fault current interrupt receptacle on the
front of the power supply. The ground fault current interrupt receptacle being in the
“Test” mode shall not remove power to the rear receptacle.

9-29.13(10)C NEMA Controller Cabinets

Each NEMA traffic controller shall be housed in a weatherproof cabinet conforming to the
following requirements:
1. Construction shall be of 0.073-inch minimum thickness series 300 stainless steel or

0.125 minimum thickness 5052 H32 ASTM B209 alloy aluminum. The stainless steel
shall be annealed or one-quarter-hardness complying with ASTM A666 stainless
steel sheet. Cabinets may be finished inside with an approved finish coat of exterior
white enamel. If no other coating is specified in the Contract Provisions the exterior
of all cabinets shall be bare metal. All controller cabinets shall be furnished with front
and rear doors.

2. The cabinet shall contain shelving, brackets, racks, etc., to support the controller

and auxiliary equipment. All equipment shall set squarely on shelves or be mounted
in racks and shall be removable without turning, tilting, or rotating or relocating
one device to remove another. A 24 slot rack or racks shall be installed. The rack(s)
shall be wired for 2 channel loop detectors and as follows. Slots 1 & 2 phase 1 loop
detectors. Slots 3, 4, & 5 phase 2 loop detectors. Slots 6 & 7 phase 3 loop detectors.
Slots 8, 9, & 10 phase 4 loop detectors. Slots 11 & 12 phase 5 loop detectors. Slots
13, 14, & 15 phase 6 loop detectors. Slots 16 & 17 phase 7 loop detectors. Slots 18,
19 & 20 phase 8 loop detectors. Slot 21 upper phase 1 loop detector. Slot 21 lower
phase 5 detector. Slot 22 wired for a 2 channel discriminator channels A, C. Slot
23 wired for a 2 channel discriminator, channels B, D. Slot 24 wired for a 4 channel
discriminator, wired for channel A, B, C, and D. All loop detector slots shall be wired
for presence/pulse detection/extension. If an external power supply is required in
order for the entire racks(s) to be powered it shall be installed. All rack(s) slots shall
be labeled with engraved identification strips.

Page 9-230

Illumination, Signal, Electrical

3. Additional detection utilizing the “D” connector shall be installed in accordance with

the Contract. The cabinet shall be of adequate size to properly house the controller
and all required appurtenances and auxiliary equipment in an upright position with a
clearance of at least 3-inches from the vent fan and filter to allow for proper air flow.
In no case shall more than 70 percent of the cabinet volume be used. There shall be
at least a 2-inch clearance between shelf mounted equipment and the cabinet wall
or equipment mounted on the cabinet wall.

4. The cabinet shall have an air intake vent on the lower half of the front door, with a

12-inch by 16-inch by 1-inch removable throw away filter, secured in place with a
spring-loaded framework.

5. The cabinet door(s) shall be provided with:

a. Cabinet doors shall each have a three point latch system. Locks shall be spring

loaded construction locks capable of accepting a Best 6 pin core. A 6 pin
construction core of type (blue, green, or Red) specified in the contract shall be
installed in each core lock. One core removal key and two standard keys shall be
included with each cabinet and delivered to the Engineer.

b. A police panel assembly shall be installed in the front door and shall have a

stainless steel hinge pin and a police panel lock. Two police keys with shafts a
minimum of 1¾-inches long shall be provided with each cabinet.

c. All doors and police panel door shall have one piece, closed cell, neoprene

gaskets.

d. A two position doorstop assembly.

6. LED light strips shall be provided for cabinet lighting. Each LED light strip shall

be approximately 12 inches long, have a minimum output of 320 lumens, and
have a color temperature of 4100K (cool white) or higher. Two light strips shall be
provided. One light strip shall be ceiling mounted and oriented parallel to the door
face. The second light strip shall be mounted under the lower shelf, such that the
output terminal landings are illuminated. Lighting shall not interfere with the proper
operation of any other ceiling or shelf mounted equipment. All lighting fixtures shall
energize automatically when any door is opened. Each door switch shall be labeled
“Light”.

9-29.13(10)D Cabinets for Type 170E and 2070 Controllers

Type 170E and 2070 controllers shall be housed in a model 332L cabinet unless specified
otherwise in the contract. Type 332L cabinets shall be constructed in accordance with
TEES with the following modifications:
1. Each door shall be furnished with the equipment listed in

Section 9-29.13(10)C

item

5 above.

2. The cabinet shall be furnished with auxiliary equipment described in

Section

9-29.13(10)B

Illumination, Signal, Electrical

9-29

3. The cabinet shall be fabricated of stainless steel or sheet aluminum in accordance

with

Section 9-29.13(10)C

, Item 1 above. Painted steel, painted or anodized

aluminum is not allowed.

4. A disposable paper filter element with dimensions of 12” × 16” × 1” shall be provided

in lieu of a metal filter. The filter shall be secured in the filter holder with a louvered
aluminum cover. The maximum depth of the cover shall not be more than 0.5″ inch
to provide the filter to be flush against the door. No incoming air shall bypass the
filter element.

5. Field wire terminals shall be labeled in accordance with the Field Wiring Chart.
6. LED light strips shall be provided for cabinet lighting, powered from the Equipment

breaker on the Power Distribution Assembly. Each LED light strip shall be
approximately 12 inches long, have a minimum output of 320 lumens, and have a
color temperature of 4100K (cool white) or higher. There shall be three light strips
for each rack within the cabinet. Lighting shall be ceiling mounted – rack mounted
lighting is not permitted. Light strips shall be installed in the locations shown in
the Standard Plans. Lighting shall not interfere with the proper operation of any
other ceiling mounted equipment. All lighting fixtures above a rack shall energize
automatically when either door to that respective rack is opened. Each door switch
shall be labeled “Light”.

7. Rack mounted equipment shall be as shown in the Standard Plans. The cabinet shall

use PDA #2LX and Output File #1LX. Where an Auxiliary Output File is required,
Output File #2LX shall also be included.

8. 332D Controller Cabinet

a. The 332D Controller cabinet shall have the appearance of two Type 332

controller cabinets joined at opposing sides. The outside Dimensions of the
cabinet shall be 67″ High × 48½″ Wide × 30¼″ Deep.

b. The right side of the cabinet, as viewed from the front, shall be considered the

Signal Control side. The left side of the cabinet, when viewed from the front,
shall be considered the ITS/COMM side.

c. One police access panel shall be installed on the right side of the cabinet, as

viewed from the front.

d. Two cabinet lights shall be provided one on each side and as described in

Section 9-29.13(10)D6

e. The Traffic Signal Control side of the cabinet shall contain the Traffic Signal

Controller assembly and shall be furnished with equipment as described in
the contract specifications. The Traffic Signal Control side of the cabinet shall
also meet all the additional equipment requirements of the Type 332 Signal
Controller cabinet as indicated in the contract specifications.

Page 9-232

Illumination, Signal, Electrical

The ITS/COMM side of the cabinet shall contain ITS and Communication
equipment and shall be furnished with the following:
1. One controller shelf unit, mounted 36 inches from the bottom of the

cabinet opening to the front of the cabinet and attaching to the front
rails of the EIA rack, shall be provided. The shelf shall be fabricated from
aluminum and shall contain a rollout flip-top drawer for storage of wiring
diagrams and manuals.

2. One aluminum sheet metal panel, ⅛″ × 15″ × 54″, shall be installed to the

rear of the cabinet on the right hand (when facing the front) side railing.

3. Additional ITS and Communication equipment as described in the Contract

Plans and the ITS section of the Contract Special Provisions.

9. The PCB connectors for Field Terminal Blocks FT1 through FT6 on Output Files

#1LX and #2LX shall be capable of accepting minimum 14 AWG field wiring, have a
pitch of 5.08 mm, and use screw flange type locking to secure the plug and socket
connection. The sockets on the Field Terminal Panel shall be secured to the panel
such that unplugging a connector will not result in the socket moving or separating
from the panel.

9-29.13(11) Traffic Data Accumulator and Ramp Meters

All cabinets designated for use as a traffic data or ramp meter shall be Type 334L cabinets
furnished to meet the TEES with the modifications listed in

Section 9-29.13(10)D

and

include the following accessories:
1. Each cabinet shall be equipped with a fully operable controller equipped as specified

in the Contract Provisions.

2. Rack mounted equipment shall be as shown in the Standard Plans.
3. PDA #3LX shall be furnished with three Model 200 Load Switches installed. PDA

#3LX shall be modified to include a second Model 430 transfer relay, mounted on
the rear of the PDA and wired as shown in the Standard Plans.

4. Police Panel shall contain only one DPDT toggle switch. The switch shall be labeled

POLICE CONTROL, ON-OFF.

5. Display Panel

a. General

Each cabinet shall be furnished with a display panel. The panel shall be
mounted, showing and providing detection for inputs and specified controller
outputs, at the top of the front rack above the controller unit. The display panel
shall be fabricated from brushed aluminum and constructed according to the
detail in the Plans.

b. Text

All text on the detector panel shall be black in color and silk screened directly to
the panel except the Phenolic detector and cabinet nameplates.

Illumination, Signal, Electrical

9-29

A nameplate for each loop shall be engraved with a ¼-inch nominal text
according to the ITS Field Wiring Charts. The nameplates shall be permanently
affixed to the detector panel.

c. LEDs

The LEDs for the display panel shall meet the following Specifications:

Case size

T 1-¾

Viewing angle

50° minimum

Brightness

8 Milli candelas

LEDs with RED, YELLOW or GREEN as part of their labels shall be red, yellow
or green in color. All other LEDs shall be red. All LEDs shall have tinted diffused
lenses.

d. Detector panel Control Switch

Each display panel shall be equipped with one detector display control switch
on the panel with labels and functions as follows:

ON
Detector panel LEDs shall operate consistent with their separate switches.

OFF
All detector indicator LEDs shall be de-energized. Detector calls shall
continue to reach the controller.

TEST
All detector indicator LEDs shall illuminate and no calls shall be placed to
the controller.

e. Advance Warning Sign Control Switch

Each display panel shall be equipped with one advance warning sign control
switch on the panel with labels and functions as follows:

AUTOMATIC
Sign Relay shall energize upon ground true call from controller.

SIGN OFF
Sign Relay shall de-energize.

SIGN ON
Sign Relay shall energize.

Sign Relay

The sign relay shall be plugged into a socket installed on the rear of the display
panel. The relay shall be wired as shown in the Plans. The relay coil shall draw
(or sink) 50 milliamperes ± 10 percent from the 170E/HC11 controller and
have a DPDT contact rating not less than 10 amperes. A 1N4004 diode shall be
placed across the relay coil to suppress voltage spikes. The anode terminal shall
be connected to terminal #7 of the relay as labeled in the plans. The relay shall
energize when the METERING indicator LED is lit.

Page 9-234

Illumination, Signal, Electrical

g. Detector Input Indicators

One LED and one spring-loaded two-position SPST toggle switch shall be
provided for each of the 40 detection inputs. These LEDs and switches shall
function as follows:

TEST
When the switch is in the test position, a call shall be placed to the
controller and energize the associated LED. The switch shall automatically
return to the run position when it is released.

RUN
In the run position the LEDs shall illuminate for the duration of each call to
the controller.

h. Controller Output Indicators

The display panel shall contain a series of output indicator LEDs mounted below
the detection indicators. The layout shall be according to the detail in the Plans.
These LEDs shall illuminate upon a ground true output from the controller via
the C5 connector.

The output indicator LEDs shall have resistors in series to drop the voltage
from 24 volts DC to their rated voltage and limit current below their rated
current. The anode connection of each LED to +24 VDC shall be wired through
the resistor.

i. Connectors

Connection to the display panel shall be made by three connectors, one pin
(labeled P2) and one socket (labeled P1) and one labeled C5. The P1 and P2
connectors shall be 50-pin cannon D series, or equivalent 50 pin connectors
and shall be compatible such that the two connectors can be connected directly
to one another to bypass the input detection. Wiring for the P1, P2 and C5
connectors shall be as shown in the Plans.

The Contractor shall install wire connectors P1, P2, C1P, C2, C4, C5 and C6
according to the pin assignments shown in the Plans.

6. Model 204 Flasher Unit

Each Model 334 ramp meter cabinet shall be supplied with one Model 204 sign
flasher unit mounted on the right rear side panel. The flasher shall be powered from
T1-2. The outputs from the flasher shall be wired to T1-5 and T1-6.

7. Fiber Optic Patch Panel

The Contractor shall provide and install a rack-mounted fiber optic patch panel as
identified in the Plans.

Cabinet Wiring
Terminal blocks TB1 through TB9 shall be installed on the Input Panel. Layout and
position assignment of the terminal blocks shall be as noted in the Plans.

Illumination, Signal, Electrical

9-29

Terminals for field wiring in traffic data and/or ramp metering controller cabinet shall
be labeled, numbered and connected in accordance with the following:

Terminal Block Pos.

Terminal and Wire Numbers

Connection Identification

TBS

501-502

AC Power, Neutral

T1-2

641

Sign on

T1-4

643

Sign off

T1-5

644

Flasher Output NC

T1-6

645

Flasher Output NO

T4-1

631

Lane 3 – Red

T4-2

632

Lane 3 – Yellow

T4-3

633

Lane 3 – Green

T4-4

621

Lane 2 – Red

T4-5

622

Lane 2 – Yellow

T4-6

623

Lane 2 – Green

T4-7

611

Lane 1 – Red

T4-8

612

Lane 1 – Yellow

T4-9

613

Lane 1 – Green

Loop lead-in cables shall be labeled and connected to cabinet terminals according to
the ITS Field Wiring Chart. This chart will be provided by the Engineer within 20 days
of the Contractor’s request.

9-29.13(12) Type 331L ITS Cabinet

Basic ITS cabinets shall be Model 331L Cabinets, unless otherwise specified in the
Contract. Type 331L Cabinets shall be constructed in accordance with the TEES, with the
following modifications:
1. The basic cabinet shall be furnished with only Housing 1 B, Mounting Cage

1, Service Panel #1, a Drawer Shelf, and Controller Unit Supports. Additional
equipment may be specified as part of the cabinet function-specific standards.

2. Housing aluminum shall be 5052 alloy with mill finish. Painted or anodized aluminum

is not allowed.

3. The door air filter shall be a disposable paper filter element of at least

180 square inches.

4. Locks shall be spring loaded construction core locks capable of accepting a Best

6-pin core. A 6-pin construction core of the type (Blue, Green, or Red) specified
in the Contract shall be installed in each core lock. One core removal key and two
standard keys (properly marked) shall be included with each cabinet and delivered to
the Engineer upon Contract completion.

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Illumination, Signal, Electrical

5. Each cabinet shall include a 120VAC electric strip heater with a rating of 100 watts,

which shall be thermostat controlled. The heater strip shall be fed by wire with a
temperature rating of 400°F or higher, and shall be shielded to prevent contact with
wiring, equipment, or personnel. If the heater thermostat is separate from the fan
thermostat, the heater thermostat must meet the same requirements as the fan
thermostat as defined in TEES.

6. LED light strips shall be provided for cabinet lighting, powered from the Equipment

7. Each cabinet shall be equipped with a power distribution assembly (PDA) mounted

in a standard EIA 19-inch (ANSI/EIA RS-310-C) rack utilizing no more than five Rack
Mounting Units (RMU) (8.75 inches). The PDA shall include the following equipment:
a. One duplex NEMA 5-15R GFCI receptacle on the front of the PDA.
b. Four duplex NEMA 5-15R receptacles on the rear of the PDA. These

receptacles shall remain energized on a trip or failure of the GFCI receptacle.

c. Four 1P-15A, 120VAC Equipment/Field Circuit Breakers.
d. Line filter meeting the requirements of

Section 9-29.13(10)A.4

PDA components shall be mounted in or on the PDA such that they are readily
accessible, provide dead front safety, and all hazardous voltage points are protected
to prevent inadvertent contact.

8. Service Panel #1 shall include a service terminal block labeled “TBS”, a Tesco TES-

10B or equivalent surge suppressor connected to provide power in line surge
suppression, and a 1P-30A Main Breaker. The Service Panel Assembly (SPA) shown
in the TEES shall not be included.

9. Each cabinet shall include a rack mounted fiber optic patch panel of the type

specified in the Contract.

Cabinet drawings and wiring diagrams shall be provided in the drawer shelf. Additionally,
an electronic (PDF format) copy of all drawings and wiring diagrams shall be provided.

9-29.14 Vacant

Illumination, Signal, Electrical

9-29

9-29.15

Flashing Beacon Control

Line Voltage flashers shall conform to the latest NEMA publication, and shall be solid
state. When used as a beacon control, they shall be jack mounted and installed in raintight
aluminum or hot-dipped galvanized steel cabinet.

9-29.16

Vehicular Signal Heads, Displays, and Housing

Each signal head shall be of the adjustable, vertical type with the number and type of
displays detailed in the Contract; shall provide an indication in one direction only; shall be
adjustable through 360 degrees about a vertical axis; and shall be mounted at the location
and in the manner shown in the Plans. Except for optically programmed signal heads, all
vehicular signal heads at any one intersection shall be of the same make and type.

Backplates shall be constructed of 5-inch-wide, .050-inch-thick corrosion-resistant flat
black finish, louvered aluminum, or Polycarbonate attached with stainless steel hardware.
A 1-inch-wide strip of yellow retro-reflective, type IV prismatic sheeting, conforming
to the requirements of

Section 9-28.12

, shall be applied around the perimeter of each

backplate with the exception of installations where all sections of the display will be dark
as part of normal operation such as ramp meters, hawk signals and tunnels.

9-29.16(1) Optically Programmed, Adjustable Face, and Programmable Array 12-Inch

Traffic Signal

The signal shall permit the visibility zone of the indication to be determined optically and
require no hoods or louvers. The projected indication may be selectively visible or veiled
anywhere within the optical axis. No indication shall result from external illumination,
nor shall one light unit illuminate a second. The display shall operate from 85 VAC to
130 VAC.

9-29.16(1)A

Optical System

9-29.16(1)A1 Non-LED Optical System

The components of the optical system shall comprise:
1. Lamp,
2.  Lamp Collar,
3.  Optical Limiter-Diffuser, and
4.  Objective Lens.

The lamp shall be nominal 150 watt, 120 volt AC, three prong, sealed beam having an
integral reflector with stippled cover and an average rated life of at least 6,000 hours.
The lamp shall be coupled to the diffusing element with a collar including a specular inner
surface. The diffusing element may be discrete or integral with the convex surface of the
optical limiter.

Page 9-238

Illumination, Signal, Electrical

The optical limiter shall provide an accessible imaging surface at focus on the optical axis
for objects 900 to 1,200 feet distant, and permit an effective veiling mask to be variously
applied as determined by the desired visibility zone. The optical limiter shall be provided
with positive indexing means and composed of heat-resistant glass.

The objective lens shall be a high resolution planar incremental lens hermetically sealed
within a flat laminant of weather resistant acrylic or approved equal. The lens shall be
symmetrical in outline and may be rotated to any 90 degree orientation about the optical
axis without displacing the primary image.

The optical system shall accommodate projection of diverse, selected indicia to separate
portions of the roadway such that only one indication will be simultaneously apparent
to any viewer after optically limiting procedures have been accomplished. The projected
indication shall conform to ITE transmittance and chromaticity standards.

9-29.16(1)A2 LED Programmable Array

1. LED array shall have a programmable visibility from a portable hand-held device from

ground level.

2. Lens shall be clear unless color lenses are specified.

The LED array shall be 22 watt maximum and shall operate directly from 120-volt AC.

The LED array shall provide an accessible imaging surface at focus on the optical axis for
objects 900 to 1,200 feet distant, and permit an effective veiling mask to be variously
applied as determined by the desired visibility zone.

The optical system shall accommodate projection of diverse selected indicia to separate
portions of the roadway such that only one indication will be simultaneously apparent
to any viewer after optically limiting procedures have been accomplished. The projected
indication shall conform to ITE transmittance and chromaticity standards.

9-29.16(1)B

Housing Construction

Die cast aluminum parts shall conform to ITE alloy and tensile requirements and have
a chromate preparatory treatment. The exterior of the signal case, lamp housing, and
mounting flanges shall be finished with a high quality, baked enamel prime and finish
paint.

The lens holder and interior of the case shall be optical black.

Signal case and lens holder shall be predrilled for backplates and visors. Hinge and latch
pins shall be stainless steel. All access openings shall be sealed with weather resistant
rubber gaskets.

Illumination, Signal, Electrical

9-29

9-29.16(1)C Mounting

The signal shall mount to standard 1½-inch fittings as a single section, as a multiple
section face, or in combination with other signals. The signal section shall be provided
with an adjustable connection that permits incremental tilting of at least 0 to 10 degree
above or below the horizontal while maintaining a common vertical axis through couplers
and mounting. Terminal connection shall permit external adjustment about the mounting
axis in five degree increments. The signal shall be mountable with ordinary tools and
capable of being serviced with no tools.

Attachments such as visors, backplates, or adapters shall conform and readily fasten to
existing mounting surfaces without affecting water and light integrity of the signal.

9-29.16(1)D Housing Electrical

9-29.16(1)D1 Electrical – Non-LED

The lamp fixture shall be comprised of a separately accessible housing and integral
lamp support, indexed ceramic socket, and self-aligning, quick release lamp retainer.
The electrical connection between case and lamphousing shall be accomplished with an
interlock assembly which disconnects lamp holder when opened. Each signal section shall
include a covered terminal block for clip or screw attachment of lead wires. Concealed
18 AWG-AWM, stranded and coded wires shall interconnect all sections to permit field
connection within any section.

9-29.16(1)D2 Electrical – LED

The Light Emitting Diode (LED) array shall be accessible from the front of the housing.
Each multi-section assembly shall include a terminal block for clip or screw attachment of
lead wires.

9-29.16(1)E

Photo Controls

9-29.16(1)E1 Conventional Photo Controls

Each signal section shall include integral means for regulating its intensity between limits
as a function of individual background illumination. Lamp intensity shall not be less than
97 percent of uncontrolled intensity at 1,000 ft-c ambient and shall reduce to 15 plus or
minus 2 percent of maximum at less than 1 ft-c ambient. Response shall be proportional
and essentially instantaneous to any detectable increase of illumination from darkness to
1,000 ft-c ambient and damped for any decrease from 100 ft-c ambient.

The intensity controller shall comprise an integrated, directional light, sensing and
regulating device interposed between lamp and line wires. It shall be compatible with
60 Hz input and responsive within the range 105 VAC to 135 VAC. Output may be phase
controlled, but the device shall provide a nominal terminal impedance of 1,200 ohms
open circuit and a corresponding holding current.

Page 9-240

Illumination, Signal, Electrical

9-29.16(1)E2 LED Photo Controls

Each signal section shall include an integral means to automatically regulate the display
intensity for day and night operation.

9-29.16(1)F Installation

The signal shall be installed, directed, and veiled in accordance with published instructions
and the project visibility requirement. Each section of the signal shall be masked with
prescribed materials in an acceptable and workmanlike manner.

9-29.16(2) Conventional Traffic Signal Heads

9-29.16(2)A

Optical Units

LED light sources are required for all displays. The Contractor shall provide test results
from a Nationally Recognized Testing Laboratory documenting that the LED display
conforms to the current ITE Specification for Vehicle Traffic Control Signal Heads, Light
Emitting Diode Circular Signal Supplement VTCSH ST-052 or Vehicle Traffic Signal Heads,
Light Emitting Diode Vehicle Arrow Traffic Signal Supplement ITE VTSCH ST-054, and the
following requirements:
1. The LED traffic signal module shall be operationally compatible with controllers and

conflict monitors on this project, and the LED lamp unit shall contain a disconnect
that will show an open switch to the conflict monitor when less than 60 percent of
the LEDs in the unit are operational.

2. LEDs shall have a 50-degree minimum viewing angle.
3. Wattage (Maximum) – 12 inch red, yellow, and green ball displays – 25 W

12 inch red, yellow, and green arrow displays – 15 W
8 inch red, yellow, and green ball displays – 15 W

4. Voltage – The operation voltages shall be between 85 VAC and 130 VAC.
5. The LED display shall be a module type and shall replace the lens, socket, bail, and

reflector and be directly connected to the terminal strip in the signal head.

6. Label – Each optical unit shall be listed by and bear the label of a Nationally

Recognized Testing Laboratory. In addition, the manufacturer’s name, trademark,
serial number, and other necessary identification shall be permanently marked on the
back side of the LED signal module, and the installation date shall be indicated on a
separate label with an indelible ink marker.

9-29.16(2)B

Signal Housing

The signal head housing, or case, shall consist of an assembly of separate sections,
expandable type for vertical mounting, substantially secured together in a weathertight
manner. Each section shall house an individual optical unit.

Illumination, Signal, Electrical

9-29

Each section shall be complete with a one-piece, corrosion-resistant aluminum alloy die
cast door and shall have a nominal 8- or 12-inch diameter opening for the lens. Each door
shall be of the hinged type having two integrally cast hinge lugs and latch jaw. The door
shall be attached to the housing by means of two noncorrosive, stainless steel hinge pins
that are removable without the use of a special press or tool. A noncorrosive, stainless
steel, threaded latch bolt and matching wing nut shall provide for opening and closing the
door without the use of any special tools. Each door shall have a cellular neoprene gasket
around the entire outer edge of the door, which, when the door is closed, shall make a
positive weather and dust-tight seal. Each door shall have four tapped holes spaced about
the circumference of the lens opening with four noncorrosive screws to accommodate
the signal head visors. Each door shall have some device such as washers, clips, or keys, or
be constructed so as to keep it from dismounting from the housing accidentally when it
is open.

The body of each signal section shall consist of a one piece corrosion resistant, die cast
aluminum alloy. Each section shall have serrated rings top and bottom so when used
with proper brackets, each section may be adjustable in respect to an adjoining section,
and the hangers shall be locked securely to prevent moving. Cast integrally with the
housing shall be two hinge lugs and one latch jaw. The top and bottom of the housing
shall have an opening to accommodate standard 1½-inch pipe brackets. The sections
shall be so designed that when assembled, they interlock with one another forming one
continuous weathertight unit. The sections shall be interchangeable and shall be dust and
weathertight when assembled with the door and appropriate furnished hardware.

A terminal block of an approved type shall be mounted inside at the back of the housing.
All sockets shall be so wired that a white wire will be connected to the shell of the socket
and a wire, the color of the lens, to the bottom, or end terminal of the socket. These wires
shall in turn be connected to the terminal block mounted in the housing, in the proper
manner. The terminal block shall have sufficient studs to terminate all field wires and lamp
wires independently to the block with separate screws. The terminals to which field wires
are attached shall be permanently identified to facilitate field work.

Each face shall be protected with a removable visor. The visor shall be tunnel type unless
noted otherwise in the Contract. Tunnel, cap, and cut away type visors shall be molded
using ultraviolet and heat stabilized polycarbonate plastic or be constructed of 0.050-
inch corrosion resistant aluminum material throughout as specified in the Contract, or
as ordered by the Engineer in accordance with

Section 1-04.4

. Visors shall be flat black

in color inside and shall be flat black or dark green on the outside. Visors shall have
attaching ears for installation to the housing door. The signal display shall have square
doors. End caps shall be made from aluminum or plastic material and shall be installed
with fittings to provide a watertight seal. A bead of silicone sealant shall be applied
around the perimeter of all top end cap openings prior to installation of the end cap
assembly. Plastic end caps shall utilize a threaded stud with seal and wing nut. Plastic end
caps utilizing a metal screw that may damage the cap if overtightened will not be allowed.
Plastic end caps shall have the same color as the signal housing.

Standard Specifications for Road, Bridge, and Municipal Construction 2020 (M 41-10) - page 53