Engineering Assessment of Current and Future Vehicle Technologies, FMVSS No. 121, Air Brake Systems, Final Report

Engineering Assessment of Current and Future Vehicle Technologies, FMVSS No. 121, Air Brake Systems, Final Report

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Published: 2007

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This report contains requirements for the performance and design of air brake systems on trucks, buses, and trailers. Its purpose is to ensure the safe braking performance of these vehicles under normal and emergency conditions. NHTSA asked that the technology review focus on three specific areas: electronic brake actuation or electronically-controlled braking systems (ECBS), air reservoir capacity, and brake performance measurement.