Specification Writing and Maintenance

TRF writes and maintains technical specifications for traffic signal equipment for use on contract jobs and for equipment purchased through the Support Services Division (SSD) Regional Supply Center. 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, Malfunction Management Units (MMU) and cabinets
  • signal hardware, such as Backup Battery Units (BBU)/Uninterruptable Power Supply (UPS) units
  • closed loop systems, and
  • vehicle detectors.
For all items that have statewide specifications available, these standard specifications should be used.