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                        Roadway Departure Safety
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            In This Section
        Roadway Departure Safety
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   Contact Us
      Aimee Zhang
      
                    
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            Office of Safety Programs
      
                
    **Email:**Aimee.Zhang@dot.gov
    If you are deaf, hard of hearing, or have a speech disability, please dial 7-1-1 to access telecommunications relay services.
                
                Guardrail Resources
    

    
    
          **Guardrail Inspection, Maintenance, and Installation Information**

**Guidance and Memoranda**

American Association of State Highway and transportation Officials (AASHTO) Manual for Assessing Safety Hardware (MASH)
	Federal Highway Administration (FHWA) memos on guardrail installation and maintenance
	Guardrail 101 (Purpose, Function, and Crashworthiness of Guardrails)
	*Report to Congress:*Roadside Safety Hardware Identification Methods**Device Specific Memoranda and Feedback**

FHWA Review of ET-Plus
	FHWA memo on Information on X-LITE Guardrail Terminals
	Letter from Tennessee Department of Transportation on X-LITE end terminal**Training Opportunities**

Training Opportunities**Additional Resources or Related Topics**

Roadside Safety Hardware: The Last Line of Defense (Fact Sheet)
	Roadway DepartureIn-Service Performance Evaluation (ISPE)

ISPE Resources and Guidance

TRB's National Cooperative Highway Research Program (NCHRP) Report 490: In-Service Performance of Traffic Barriers
	*Transportation Research Board* (TRB) *Special Report 323:*In-Service Performance Evaluation of Guardrail End Treatment
	Texas A&M: Developing an In-Service Performance Evaluation (ISPE) for Roadside Safety Features in Texas
	AASHTO’s MASH Hardware 2nd Edition, 2016, *Chapter 7 – In-Service Performance Evaluation*
	FHWA memo on In-Service Performance Evaluation (ISPE)Research

Internal

FHWA Pilot ISPE Guardrail End Treatment
	For information on ISPE pilot, contact Ana Maria Eigen (ana.eigen@dot.gov)
	202-493-3168.External

ISPE National Cooperative Highway Research Program Study: NCHRP 22-33 Multi-State In-Service Performance Evaluations of Roadside Safety Hardware
	Florida Department of Transportation In-Service Performance Evaluations (ISPE) web page
	NCHRP Roadside Hardware Replacement Analysis: User Guide
	Summary Report of 2021 MASH Virtual RoundtablesFor more information on ***Guardrail Inspection, Maintenance, and Installation Information***, please contact the Office of Safety, Aimee Zhang (Aimee.Zhang@dot.gov) 202-366-6537.
              
      
    
          Last updated: Tuesday, May 16, 2023 U.S. DEPARTMENT OF TRANSPORTATION

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