Underride truck accidents in Georgia
<p>A passenger sedan northbound on I-475 outside Macon at highway speed encounters a tractor-trailer that has slowed to 25 mph in the right lane after a tire blowout on the trailer. The sedan driver, looking at the GPS display for the next exit, registers the trailer’s rear too late. The sedan’s brakes engage at a closing speed of 45 mph but cannot stop in the available gap. The sedan’s hood passes under the rear edge of the trailer’s body, and the trailer’s underride guard (a horizontal steel bar mounted across the rear) engages the sedan’s front structure. The guard is positioned 22 inches above the pavement under FMVSS 224, and the sedan’s hood is 31 inches above the pavement. The guard contacts the sedan’s grille and front bumper structure, deforms, and partially separates from one of its mounting brackets. The sedan continues forward 14 additional inches before the guard’s residual structure stops the underride. The sedan’s A-pillars contact the trailer’s rear, the windshield shears, and the trailer’s body crushes the passenger compartment from above. The driver dies at the scene.</p> <p>Underride truck accidents in Georgia are the most catastrophic injury pattern in commercial truck crashes. The Insurance Institute for Highway Safety has documented approximately 500 to 600 deaths per year nationally from underride collisions where passenger vehicles strike tractor-trailers from the rear or the side. The injury mechanism, in which the passenger vehicle slides beneath the trailer body and the truck’s structure intrudes into the passenger compartment at occupant head height, produces fatality rates substantially higher than other commercial truck crash types. The modern Federal Motor Vehicle Safety Standards governing rear underride protection, FMVSS 223 and FMVSS 224, were established in 1996 with compliance required for trailers manufactured on or after January 26, 1998. NHTSA published an upgrade rule on July 15, 2022 with an effective date of January 11, 2023 and a compliance date of July 15, 2024, and NHTSA denied an Advocates for Highway and Auto Safety petition for further upgrades to add a 30 percent overlap test on June 27, 2024.</p> <p>This article walks through the underride </p>