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DOT/FHWA RIN: 2125-AD42 Publication ID: Spring 1998 
Title: Antilock Brake Systems 
Abstract: The FHWA is proposing to amend the Federal Motor Carrier Safety Regulations (FMCSRs) to require that air-braked truck tractors manufactured on or after March 1, 1997, and air-braked single-unit trucks, buses, trailers, and converter dollies manufactured on or after March 1, 1998, be equipped with antilock brake systems (ABSs) that meet the requirements of Federal Motor Vehicle Safety Standard (FMVSS) No. 121. The FHWA is also proposing that hydraulic braked trucks and buses manufactured on or after March 1, 1999, be equipped with ABSs that meet the requirements of FMVSS No. 105. This rulemaking is intended to ensure that the in-service brake standards of the FMCSRs are consistent with the FMVSSs and to improve the safety of operation of commercial motor vehicles (CMVs) by reducing the incidence of accidents caused by jackknifing and other losses of directional stability and control during braking. With regard to CMVs manufactured prior to the dates previously mentioned, the FHWA is not proposing that motor carriers be required to retrofit such vehicles with ABSs. However, the FHWA is requesting comments on this subject. 
Agency: Department of Transportation(DOT)  Priority: Substantive, Nonsignificant 
RIN Status: Previously published in the Unified Agenda Agenda Stage of Rulemaking: Final Rule Stage 
Major: No  Unfunded Mandates: No 
CFR Citation: 49 CFR 393    49 CFR 1.48   
Legal Authority: 49 USC 31136    49 USC 31502   
Timetable:
Action Date FR Cite
Notice of Intent  03/10/1995  60 FR 13306   
NPRM  07/12/1996  61 FR 36691   
NPRM Comment Period End  09/10/1996    
Final Action  04/00/1998    
Additional Information: ANALYSIS: Regulatory Evaluation
Regulatory Flexibility Analysis Required: No  Government Levels Affected: None 
Included in the Regulatory Plan: No 
Agency Contact:
Larry W. Minor
Director, Office of Bus and Truck Standards and Operations
MC-PSV, 1200 New Jersey Avenue, SE,
Washington, DC 20590
Phone:202 366-4009
Email: larry.minor@dot.gov