New Delhi, Sept. 28 -- The National Highways Authority of India (NHAI) on Monday flagged the use of improper crash barriers on some of its own highway projects that do not conform to prescribed safety specifications, including requirements for the thickness of metal beams and posts, spacers and channel-type posts through a policy circular.

This amends its December 17, 2024 policy on approval and installation of metal beam crash barriers. The authority has now made the relevant provisions of the Manual of Specifications and Standards and IRC:119-2015 mandatory for all future projects and projects where such barriers are yet to be installed.

For three-beam barriers, NHAI has prescribed a 3mm-thick rail and 3mm steel posts, with the posts ...