What Is the FMVSS-121 (Federal Motor Vehicle Safety Standards)?
The Federal Motor Vehicle Safety Standard (FMVSS) 121 specifies requirements for air brake systems on trucks, buses, and trailers. It was established by the National Highway Traffic Safety Administration (NHTSA) under the authority of the National Traffic and Motor Vehicle Safety Act. The purpose of FMVSS 121 is to ensure safe braking performance and stability…