This Recommended Practice provides a road test procedure for trucks and buses, to evaluate their compliance with Federal Motor Vehicle Safety Standard (FMVSS) 121; Air Brake Systems. Units of measure are English in lieu of metric to be consistent with FMVSS 121.
SAE J1626/2-2017 history
2023SAE J1626/2-2023 Recommended Practice for Braking, Stability, and Control Performance Test Procedure for Air-Brake-Equipped Trucks and Buses
2017SAE J1626/2-2017 Recommended Practice for Braking, Stability, and Control Performance Test Procedure for Air-Brake-Equipped Trucks and Buses