Federal Motor Vehicle Safety Standards; Stability and Control of Medium and Heavy Vehicles During Braking; and Stopping Distance Requirements

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This document responds to petitions for reconsideration of a final rule that amended Standard No. 105, Hydraulic Brake Systems, and Standard No. 121, Air Brake Systems, to require medium and heavy vehicles be equipped with an antilock brake system (ABS). This document also responds to petitions for reconsideration of final rules that established 60 mph stopping distance requirements for hydraulic-braked heavy vehicles and reinstated such requirements for air-braked heavy vehicles.