Business · 26/01/1998Updated: 10/17/2026 · 1 min read

NHTSA Amends Rear Impact Guard Standard for Heavy Trailers and Semitrailers

The National Highway Traffic Safety Administration (NHTSA) has revised its final rule on rear impact guards for heavy trailers and semitrailers, clarifying the height requirement and excluding certain vehicles from the standard, while also increasing the acceptable force application rates during testing.