Section 2: Traffic Safety Division Support
TRF Support Functions
The Traffic Safety Division (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 department purchased and district contract jobs
- consulting with districts regarding traffic signal design applications
- field support, including system installation and troubleshooting.
Signal System Analysis
TRF can provide system analysis for:
- arterial signal timing
- diamond interchange controllers
- arterial and network timing optimization
- arterial and network analysis
- capacity analysis.
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.