NCHRP Report 350: Devices in Work Zones
Prepared: February, 2004
Revised: April 5, 2004
FHWA Office of Safety Design
Crash Testing Guidance
- National Cooperative Highway Research Program Report 350 "Recommended Procedures for the Safety Performance Evaluation of Highway Features"
- Published in 1993
- Implementation began in 1998
- Report 350 is guidance for testing
Crash Testing Policy
Report 350 is part of FHWA policy. Federal register announcement in 1993 gave 5 years to implementation. In 1998 FHWA and AASHTO reached agreement on final deadline dates, most of which have now passed.
- AASHTO Standard Specifications for Structural Supports for Highway Signs, Luminaires and Traffic Signals - 1985
- FHWA Policy Adopted NCHRP Report 350 for National Highway System (NHS) - 1993
- Millennium MUTCD Extends Crashworthiness to all roads - 2000
If a device has been successfully crash tested by a reputable test house, and certified to have meet the Report 350 Evaluation Criteria, then it may be used whether or not the FHWA has written an Acceptance Letter.
- FHWA policy now requires crashworthy devices to be used within the clear zone on all projects on the National Highway System.
- "Crashworthy" means they have met the test and evaluation criteria of Report 350 and/or have received a "Letter of Acceptance" from the FHWA
- As a service to industry, FHWA reviews crash tested products and issues Letters of Acceptance
- Devices meeting NCHRP Report 350 guidelines posted on FHWA Safety Web: http://safety.fhwa.dot.gov/
Four Categories of WZ Devices
For Additional Information:
FHWA - HSA-10
400 Seventh Street, SW
Washington, DC 20590
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