Last July, NHTSA said it would issue an Advanced Notice of Proposed Rulemaking for rear impact guards for single unit trucks and a Notice of Proposed Rulemaking for the guards on trailers and semi-trailers.
The agency began the efforts last year after the Truck Safety Coalition petitioned to have all trucks and trailers equipped with energy-absorbing rear impact or underride guards. These would be mounted lower to the ground – 16 inches – with vertical supports spaced farther apart – 8 inches from the side edges.
The coalition says these guards would protect car occupants from death and injury in rear impact crashes.
A separate rulemaking to require the guards on trailers and semi-trailers has yet to be sent to the OMB.