Most deaths in large truck crashes are passenger vehicle occupants. Large trucks often weigh 20-30 times as much as passenger vehicles. They are taller and have greater ground clearance than cars, which means that lower-riding vehicles can slide beneath truck trailers, with deadly consequences. Strong underride guards can prevent that from happening.
Truck driver fatigue is a known crash risk. Under federal hours-of-service regulations, drivers of large trucks are allowed to be behind the wheel for as long as 11 hours at a stretch.
Truck braking capability can be a factor in crashes. Compared with passenger vehicles, stopping distances for trucks are much longer, particularly on wet and slippery roads or if the brake systems are poorly maintained.
Requiring side underride guards for large trucks could save 10 times as many lives as federal regulators estimate.
June 13, 2023
IIHS urges regulators to act fast to require speed limiters on large and medium-duty trucks.
July 15, 2022