49 CFR 571 121-2012
Standard No. 121; Air brake systems

Standard No.

49 CFR 571 121-2012

Release Date

2012

Published By

FMVSS - Federal Motor Vehicle Safety Standards

Scope

This standard establishes performance and equipment requirements for braking systems on vehicles equipped with air brake systems. Purrpose. The purpose of this standard is to insure safe braking performance under normal and emergency conditions