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DOT/NHTSA RIN: 2127-AM54 Publication ID: Fall 2022 
Title: Side Underride Guards on Trailers and Semitrailers 
Abstract: 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: Economically Significant 
RIN Status: Previously published in the Unified Agenda Agenda Stage of Rulemaking: Prerule Stage 
Major: Yes  Unfunded Mandates: No 
CFR Citation: 49 CFR 571   
Legal Authority: 49 USC 30111    49 USC 301126    49 USC 30115    49 USC 30117    49 USC 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  12/00/2022 
Analyzing Comments  04/00/2023 
Regulatory Flexibility Analysis Required: No  Government Levels Affected: None 
Small Entities Affected: No  Federalism: No 
Included in the Regulatory Plan: No 
RIN Information URL:   Public Comment URL:  
RIN Data Printed in the FR: No 
Agency Contact:
Jim Myers
Chief, Special Vehicles and Systems Division
Department of Transportation
National Highway Traffic Safety Administration
1200 New Jersey Avenue SE,
Washington, DC 20590
Phone:202 493-0031