Federal Motor Vehicle Safety Standards; Rear Impact Guards; Notice of Proposed Rulemaking

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This document responds to a petition for rulemaking from Thieman Tailgates, Inc., concerning the Federal motor vehicle safety standard requiring trailers and semitrailers to be equipped with rear impact guards. The petitioner asked us to amend the standard so that it expressly excludes trailers with rear-mounted liftgates that reside in or move through any part of the area specified in the standard for the horizontal member of the rear impact guard. Alternatively, the petitioner asked us to exclude rear impact guards on those trailers from the energy absorption requirements of the equipment standard for rear impact guards. We are denying both requests. In lieu of proposing either of the requested amendments, we are proposing to specifically exclude trailers with "tuckunder liftgates," which consist of a loading platform that operates from its stowed position by swinging out to the rear of the trailer where it may be hydraulically raised and lowered to load heavy deliveries. We are also proposing to amend the definition of "special purpose vehicle" by adding a more precise description of the cubic area at the rear of the trailer in which work-performing equipment must reside in or m