49 CFR § 234.225 - Activation of warning system.

---
identifier: "/us/cfr/t49/s234.225"
source: "ecfr"
legal_status: "authoritative_unofficial"
title: "49 CFR § 234.225 - Activation of warning system."
title_number: 49
title_name: "Transportation"
section_number: "234.225"
section_name: "Activation of warning system."
chapter_name: "FEDERAL RAILROAD ADMINISTRATION, DEPARTMENT OF TRANSPORTATION"
part_number: "234"
part_name: "GRADE CROSSING SAFETY"
positive_law: false
currency: "2026-03-24"
last_updated: "2026-03-24"
format_version: "1.1.0"
generator: "[email protected]"
authority: "49 U.S.C. 20103, 20107, 20152, 20160, 21301, 21304, 21311, 22907 note; 28 U.S.C. 2461 note; and 49 CFR 1.89."
regulatory_source: "61 FR 31806, June 20, 1996, unless otherwise noted."
cfr_part: "234"
---


# 234.225 Activation of warning system.

A highway-rail grade crossing warning system shall be maintained to activate in accordance with the design of the warning system, but in no event shall it provide less than 20 seconds warning time for the normal operation of through trains before the grade crossing is occupied by rail traffic.