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DOT/NHTSA RIN: 2127-AK18 Publication ID: Fall 2017 
Title: FMVSS No. 124, Accelerator Control Systems Upgrade 

NHTSA intends to withdraw this NPRM in its entirety. The Agency had issued this NPRM to make two fundamental changes to the safety standard for accelerator control systems. One proposed change was to add a Brake-Throttle Override (BTO) requirement. However, since all vehicle manufacturers now have equipped their U.S. vehicles with this technology, the agency has determined a BTO requirement is not needed. Another proposed change was to update the requirements and test procedures in FMVSS No. 124 to address electronic throttle controls (ETC). However, commenters raised concerns about the proposal that NHTSA cannot address without further research. Also, the subject of ETC safety is tied into a larger effort to address overall functional safety of vehicle electronics, which is an area of ongoing research by NHTSA and other stakeholders.

Agency: Department of Transportation(DOT)  Priority: Substantive, Nonsignificant 
RIN Status: Previously published in the Unified Agenda Agenda Stage of Rulemaking: Proposed Rule Stage 
Major: No  Unfunded Mandates: No 
EO 13771 Designation: Deregulatory 
CFR Citation: 49 CFR 571.124   
Legal Authority: 49 U.S.C. 301   
Legal Deadline:
Action Source Description Date
NPRM  Statutory  Initiate Rulemaking   08/28/2009 
Action Date FR Cite
NPRM  04/16/2012  77 FR 22638   
NPRM Comment Period End  06/15/2012 
To Be Withdrawn  05/00/2018 
Regulatory Flexibility Analysis Required: No  Government Levels Affected: None 
Small Entities Affected: No  Federalism: No 
Included in the Regulatory Plan: No 
International Impacts: This regulatory action will be likely to have international trade and investment effects, or otherwise be of international interest.
RIN Information URL:   Public Comment URL:  
RIN Data Printed in the FR: No 
Agency Contact:
Mike Pyne
Office of Crash Avoidance Standards
Department of Transportation
National Highway Traffic Safety Administration
1200 New Jersey Avenue, SE,
Washington, DC 20590