Guidelines on Projects with Traffic Signal Preemption

  1. Correct timing is identified on plan sheet (equipment response time, advance preemption time, clearance time, minimum time, and buffer time). Any traffic signal timings shown match timings in preemption form (TxDOT Form 2304).
  2. All signal heads shown.
  3. Phasing diagram for normal operation shown.
  4. Preemption phasing diagram shown with right of way transfer, track clearance, dwell or limited cycle, and exit phases.
  5. Plans identify conduits and traffic signal cable between traffic signal cabinet and rail cabin, including
    responsible party for providing and installing
     materials.
  6. Traffic signal cable should be a minimum
    12
     conductor cable.
  7. Plans clarify
    responsible party for traffic signal maintenance and operation
    .
  8. Protected left turn provided for traffic on track clearance phase (if conflicting traffic is approaching the traffic signal from opposite side of the intersection).
  9. Battery back-up provided for
    TSC
    .
  10. Traffic signal poles do not block active warning devices.