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DOT/NHTSA RIN: 2127-AM54 Publication ID: Spring 2022 
Title: ●Side Underride Guards on Trailers and Semitrailers 

This rulemaking would consider requirements for side underride guards on trailers and semitrailers to mitigate underride crashes into the side of these vehicles.  This rulemaking would respond, in part, to a September 12, 2013 petition for rulemaking from Ms. Karth and the Truck Safety Coalition to start studies and rulemakings on side guards and front override guards on trucks.  This rulemaking would also respond to a provision in the Bipartisan Infrastructure Law to conduct research on side underride guards to assess their effectiveness, feasibility, costs and benefits, and report the findings of the research in a Federal Register notice to seek public comment.

Agency: Department of Transportation(DOT)  Priority: Substantive, Nonsignificant 
RIN Status: First time published in the Unified Agenda Agenda Stage of Rulemaking: Prerule Stage 
Major: No  Unfunded Mandates: No 
CFR Citation: 49 CFR 571   
Legal Authority: 49 U.S.C. 30111    49 U.S.C. 30115    49 U.S.C. 30117    49 U.S.C. 30166    49 U.S.C. 322    delegation of authority at 49 CFR 1.95   
Legal Deadline:
Action Source Description Date
Other  Statutory  Issue Federal Register notice.  02/28/2023 

Overall Description of Deadline: Section 23011 of the Bipartisan Infrastructure Law mandates a Federal register notice seeking comment on the findings of the research on side underride guards by February 2023.

Action Date FR Cite
ANPRM  07/00/2022 
Regulatory Flexibility Analysis Required: No  Government Levels Affected: None 
Small Entities Affected: No  Federalism: No 
Included in the Regulatory Plan: No 
RIN Data Printed in the FR: No 
Agency Contact:
Lina Valivullah
General Engineer
Department of Transportation
National Highway Traffic Safety Administration
1200 New Jersey Avenue SE,
Washington, DC 20590