Division 13-16-003
Signal Equipment

Sections:

13-16-003-0001    Required/Approved Product List

13-16-003-0001.1    Controller

13-16-003-0002    Controller Cabinet

13-16-003-0003    Electrical Service Cabinet

13-16-003-0004    Uninterruptable Power Supply System

13-16-003-0005    Pull Boxes

13-16-003-0006    Traffic Signal Mounting Assemblies

13-16-003-0007    Traffic Signal Heads and Indications

13-16-003-0008    Pedestrian Signals

13-16-003-0009    Traffic Signal Hardware Finishes

13-16-003-0010    Detection Systems

13-16-003-0001 Required/Approved Product List

The City Traffic Engineer maintains a list of traffic signal components and products that are either required to be used, or that are pre-approved for use in City of Flagstaff traffic signals. This list is updated as new products and technologies come onto the market. Because of communication, compatibility, and inventory concerns, certain components are specified by manufacturer and model. Alternatives to these components will not be accepted in new signal installations. Additional components are also specified by manufacturer and model. Submittal of components for approval as “equal” to items on the list may require the submittal of additional information or product samples for testing and review before acceptance in a specific signal design. (Ord. 2017-22, Rep&ReEn, 07/05/2017; Ord. 2020-10, Amended, 09/15/2020 (Res. 2020-13))

13-16-003-0001.1 Controller

A.    Controller shall be NEMA TS2, Type 2. See approved products list for acceptable controllers.

B.    Controller shall be fully compatible with Maxview Advanced Traffic Management System Software by Intelight, allowing all database and controller functions to be accessed and set through the Maxview software.

C.    Controller shall include at least one (1) integral Ethernet port for connection to a laptop or communications network, and at least one (1) USB port to update application software, upload or download configuration, and upload logged data. (Ord. 2020-10, Enacted, 09/15/2020 (Res. 2020-13))

13-16-003-0002 Controller Cabinet

A.    Cabinet shall be NEMA TS2, Type 1 design with all inputs and outputs through BIU interface. The back panel shall include sixteen (16) load switch bays.

B.    The signal cabinet shall be unpainted aluminum, and provided with and mounted on a sixteen (16) inch high aluminum elevator base.

C.    The cabinet shall include a vehicle detection rack to accommodate sixteen (16) channels of detection.

D.    The cabinet shall include a telemetry interface.

E.    The cabinet shall provide mounting for four (4) channels of 3M Opticom preemption.

F.    The cabinet shall include the components listed below. See approved products list.

G.    The cabinet shall include a GPS-based time clock with digital display, which can supply a momentary dry relay closure to the controller programmable for any half (1/2) hour of the day. (Ord. 2017-22, Rep&ReEn, 07/05/2017; Ord. 2020-10, Amended, 09/15/2020 (Res. 2020-13))

13-16-003-0003 Electrical Service Cabinet

A.    Electrical Service Cabinet.

1.    Shall be a pedestal type, mounted separately from the traffic signal cabinet unless otherwise specified.

2.    Shall provide metered 120/240 VAC power for signal and lighting loads.

3.    Shall include a one hundred (100) amp main disconnect for all underground service conductors.

4.    Shall provide space for a minimum of eight (8) one (1) inch circuit breakers.

5.    Shall be of sufficient size to permit three (3) two (2) inch conduits to enter the customer section of the enclosure.

6.    The electrical service cabinet may be combined with the UPS system cabinet and equipment. (Ord. 2017-22, Rep&ReEn, 07/05/2017; Ord. 2020-10, Amended, 09/15/2020 (Res. 2020-13))

13-16-003-0004 Uninterruptable Power Supply System

A traffic signal UPS system shall be supplied in a separate cabinet next to the controller cabinet. The UPS system shall include four (4) batteries of sufficient amp-hour rating to support the continuous full operation of a traffic signal drawing one thousand (1,000) watts for a minimum of four (4) hours; the UPS shall not operate the street lighting. The UPS shall have an automatic transfer switch with a manual bypass mode, and accommodate the removal of the system control unit and batteries while the signal is operating on line power. The UPS system shall include provisions for generator operation on a signal including a utility acceptable knife type transfer switch and a NEMA Type L14-30R cord inlet with a lockable cover. The UPS shall increase or decrease voltage to maintain normal operation during brownouts and power spikes (buck-boost function) without using battery power.

The UPS shall provide for remote access via SNMP Ethernet for remote programming, monitoring, and data retrieval with a built-in web browser interface. It shall include remote monitoring and alarm transmission capabilities through an Ethernet RJ45 IP addressable port and at a minimum transmit alarms for (A) input power present (system in stand-by mode); (B) UPS on battery operation; and (C) low battery condition. The UPS shall have fully programmable dry contacts.

See approved products list for acceptable UPS systems. (Ord. 2017-22, Rep&ReEn, 07/05/2017; Ord. 2020-10, Amended, 09/15/2020 (Res. 2020-13))

13-16-003-0005 Pull Boxes

All pull boxes, lids and extensions, except for the No. 9 pull box and cover, shall be fiberglass reinforced polymer concrete. Pull box lids, except for the No. 9 pull box, will be marked “Traffic Signal.” The No. 9 pull box lid shall be marked “City of Flagstaff” in minimum two (2) inch high letters. (Ord. 2017-22, Rep&ReEn, 07/05/2017; Ord. 2020-10, Amended, 09/15/2020 (Res. 2020-13))

13-16-003-0006 Traffic Signal Mounting Assemblies

A.    All mounting assemblies shall be ADOT standard types, manufactured of bronze.

B.    All mounting hardware shall have cast serrations. Serrated locking rings will not be permitted.

C.    ADOT Type II mounts will be used for all overhead signals. Type I mounts will not be permitted. (Ord. 2017-22, Rep&ReEn, 07/05/2017; Ord. 2020-10, Amended, 09/15/2020 (Res. 2020-13))

13-16-003-0007 Traffic Signal Heads and Indications

A.    All signal heads shall be shipped fully assembled. Back plates and visors may be packaged and shipped separately for field installation.

B.    All signal head back plates shall be made from one (1) piece of anodized flat black sixteen (16) gauge aluminum sheet having a non-louvered, five (5) inch border. Backplates shall have a yellow retroreflective strip two (2) inches wide along the perimeter of the face to project a continuous rectangular appearance at night.

C.    All vehicle signal indications shall be light emitting diode (LED) modules, which meet the requirements of ITE VTCSH Standards, including supplements. (Ord. 2017-22, Rep&ReEn, 07/05/2017; Ord. 2020-10, Amended, 09/15/2020 (Res. 2020-13))

13-16-003-0008 Pedestrian Signals

All pedestrian signal indications shall be LED countdown type. Modules shall meet the requirements of ITE VTCSH Standards. All pedestrian signals shall be accessible pedestrian signals (APS). (Ord. 2017-22, Rep&ReEn, 07/05/2017; Ord. 2020-10, Amended, 09/15/2020 (Res. 2020-13))

13-16-003-0009 Traffic Signal Hardware Finishes

A.    All metal surfaces of traffic signal heads, pedestrian signal heads, push button assemblies and mounting framework shall be pretreated and electrostatically powder-coated flat black.

B.    All traffic signal poles, signal mast arms, and luminaire mast arms shall be galvanized inside and out.

C.    See streetlight specifications for luminaire housing finish requirements. (Ord. 2017-22, Rep&ReEn, 07/05/2017; Ord. 2020-10, Amended, 09/15/2020 (Res. 2020-13))

13-16-003-0010 Detection Systems

A.    A complete traffic signal video or microwave (radar) detection system listed on the approved products list shall be installed for vehicle detection.

1.    The detection system shall provide for local configuration, monitoring, and retrieval of data (where the system logs data) by a technician on site. If this function is provided through a laptop connected to the system on site, it shall be through an Ethernet connection. If this function is provided by a means other than a laptop, a color monitor or integral display screen shall be provided to facilitate configuration and monitoring. The video monitor provided shall have a ten (10) to twelve (12) inch screen size, measured diagonally.

2.    The detector system shall be IP addressable and provide access via SNMP Ethernet for remote configuration, monitoring, and data retrieval from a traffic management center (TMC) with a web browser interface built into the detection system.

3.    Video systems shall include a heater to keep the lens and housing window of each camera clear of snow and ice.

4.    All software, mounting assemblies, cables, fittings, connectors, power supplies, fuses, lightning protection, and any other hardware or devices needed for a complete, functioning installation shall be included.

5.    The detector system shall support a TS2 Type 1 SDLC interface with a standard NEMA TS2 SDLC cable, and support up to sixty-four (64) detector outputs and thirty-two (32) inputs.

6.    The detector shall be able to connect to a wired input/output card which supports wired input/output in cabinets without SDLC capability.

7.    The detector system shall include at least one (1) USB port through which system and application software can be reinstalled and updated.

B.    The City Traffic Engineering Section may require the installation of inductive loop detectors, due to special conditions.

1.    All inductive presence detection loops shall be quadrupole design.

2.    Preformed loop detectors are preferred; however, cut in place loops shall be considered when appropriate.

3.    Standard loop configuration shall be:

a.    Left turn lanes require a six (6) foot by forty (40) foot front loop and a six (6) foot by twenty (20) foot rear loop separated by twelve (12) feet.

b.    Through and right turn lanes require a six (6) foot by fifty (50) foot loop.

c.    Bike lanes require a three (3) foot by ten (10) foot loop.

d.    High-speed approaches may require one (1) or more six (6) foot by six (6) foot square advance extension loops per lane.

4.    Loop detector amplifiers shall be two (2) channel units with programmable extension and delay timing.

C.    Pedestrian push button stations shall be ADOT Type 2 design and shall be ADA compliant. Buttons shall utilize PEIZO-electric switching and provide visual and audible indications of activation. (Ord. 2017-22, Rep&ReEn, 07/05/2017; Ord. 2020-10, Amended, 09/15/2020 (Res. 2020-13))