Federal Motor Vehicle Safety Standards; Hydraulic and Electric Brake Systems

Riepilogo

This document proposes to amend the Federal motor vehicle safety standard on hydraulic and electric brake systems to extend the current minimum performance requirements and associated test procedures for parking brake systems to all vehicles with a gross vehicle weight rating (GVWR) greater than 10,000 pounds (4,536 kilograms). Currently, the only vehicles with a GVWR greater than 10,000 pounds to which the standard's parking brake requirements apply are school buses. The agency tentatively concludes that it is in the interest of safety to require all vehicles with a GVWR over 10,000 pounds to have parking brakes that meet the performance requirements currently applicable to heavy school buses. This document also proposes to change the application language of the standard and grants a petition for rulemaking requesting that the agency update a reference to an industry standard for assessing the performance of parking brakes in moving barrier collision tests so that the most recent version of the standard is referenced.