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Laws, rules, and standards
From the National Work Zone Safety Information Clearinghouse:
From Federal Highway Administration and other partners:
- Recommended Procedures for the Safety Evaluation of Highway Features (Report 350), 1993, National Cooperative Highway Research Program (NCHRP)
- Manual for Assessing Safety Hardware (MASH): 2nd Edition, 2015-2016, American Association of State Highway and Transportation Officials (AASHTO)
However, work zone devices (including portable barriers) manufactured after Dec. 31, 2019 must meet MASH criteria. Also, contracts on the National Highway System with a letting date after the following dates must meet MASH criteria:
- Dec. 31, 2017: w-beam barriers and cast-in-place conc. barriers
- June 30, 2018: w-beam terminals
- Dec. 31, 2018: cable barriers, cable barrier terminals, and crash cushions
- Dec. 31, 2019: bridge rails, transitions, all other longitudinal barriers (including portable barriers installed permanently), all other terminals, sign supports, and all other breakaway hardware.
The American Association of State Highway and Transportation Officials (AASHTO) and the Federal Highway Administration (FHWA) encourage agencies to upgrade existing safety hardware to comply with the Manual for Assessing Safety Hardware (MASH).
Get more information.