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Section 2: Traffic Operations Division Support

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TRF Liaison

The Traffic Operations Division (TRF) designates a contact liaison within the division for traffic signal issues for each district. The liaisons serve as the first point of contact for the districts on traffic signal issues. Generally the TRF liaison is the traffic operations field area head for the particular area of the state.

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TRF Support Functions

TRF supports district signal design and operation activities. Support is available in the following areas:

  • plan, specification, and estimate (PS&E) review
  • operational matters, such as traffic signal phasing and timing
  • technical issues (such as controllers and detectors), including:
    • writing and maintaining equipment specifications
    • performing equipment inspection and testing for the General Services Division (GSD) and district contract jobs
    • consulting with districts regarding traffic signal design applications
  • field support, including system installation and troubleshooting.
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Signal System Analysis

TRF can provide system analysis using:

  • Passer2 for arterial signal timing
  • Passer3 for diamond interchange controllers
  • Passer4 for arterial and network timing optimization
  • Transyt for arterial and network analysis
  • Highway Capacity Software (HCS) for capacity analysis.
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Specification Writing and Maintenance

TRF writes and maintains technical specifications for traffic signal equipment for use on contract jobs and for equipment purchased through GSD. TRF also assists districts in developing technical specifications for one-time or district-wide use for items not covered by the standard specifications. Specifications for which TRF is responsible include:

  • traffic signal controllers and cabinets
  • signal hardware, such as signal heads and lamps
  • closed loop systems
  • and vehicle detectors.

NOTE: For all items that have statewide specifications available these standard specifications should be used.

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Equipment Testing for General Services

TRF performs the functional and environmental tests for equipment purchased by the General Services Division (GSD) to make sure it meets specifications.

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