Highway-Rail Crossing Handbook
active-treatments — Active Treatments
Crossing Handbook · Chapter 2 — Engineered Treatments. Full current text with cross-references on BuildSpec.
51ACTIVE TREATMENTS Overview Active traffic control devices are those that give visual and audible advance notice of the approach of a train. These include flashing ‑light signals (both mast ‑mounted and cantilevered), bells, automatic gates, active advance warning devices, and highway traffic signals. Active devices are typically activated by the passage of a train over a detection circuit in the track, except in those few situations where manual control or manual operation is used (LRT systems typically use loops or contacts because LRT tracks are used as an electrical “ground” to propel…
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