49 CFR 393.19 - Hazard warning signals.

Regulations last checked for updates: May 03, 2025

Title 49 - Transportation last revised: Mar 20, 2025

View all text of Subpart B [§ 393.9 - § 393.33]

§ 393.19 - Hazard warning signals.

The hazard warning signal operating unit on each commercial motor vehicle shall operate independently of the ignition or equivalent switch, and when activated, cause all turn signals required by § 393.11 to flash simultaneously.

[70 FR 48046, Aug. 15, 2005]

authority: 49 U.S.C. 31136,31151,31502; sec. 1041(b), Pub. L. 102-240, 105 Stat. 1914, 1993; secs. 5301 and 5524, Pub. L. 114-94, 129 Stat. 1312, 1543, 1560; and 49 CFR 1.87

source: 33 FR 19735, Dec. 25, 1968, unless otherwise noted.

cite as: 49 CFR 393.19