Traffic on I-88 slows, the tractor-trailer ahead of you stops and you brake hard. Instead of hitting a bumper, your hood keeps going and the trailer deck meets your windshield. That is an underride crash, and it turns a typical rear-end collision into something far worse. Here is what makes these wrecks different and what a claim has to prove.
Understanding how underride crashes happen
A loaded semi-trailer sits several feet above the pavement, far higher than your front bumper. A car that hits the rear or side of that trailer can slide into the open space underneath instead of bouncing back.
Rear underride often follows a sudden slowdown or dim trailer lights, while side underride tends to happen when a truck turns across lanes at night. Federal standards require most new trailers rated at 10,000 pounds or more to carry a rear impact guard, though none yet require side guards.
Recognizing why the injuries can be so severe
Crumple zones, airbags and seat belts handle force that meets the front of your car. An underride crash skips past all of it, because the trailer clears the bumper and strikes the windshield and roof pillars.
Survivors often face traumatic brain injuries, spinal cord damage and severe facial trauma rather than the bruises an ordinary rear-end crash produces. Severity still depends on speed and angle, and crash tests on side guards show a car can stay out from under a trailer at 40 miles per hour.
Identifying evidence that can explain the crash
Proof disappears fast. The trailer returns to service, your car goes to salvage and the scene reopens within hours. Photographs of the rear impact guard matter, because a bent, rusted or missing guard points to a crash a sound guard might have changed.
An onboard computer called the engine control module can capture speed and braking in the final seconds. Carriers generally keep records of duty status for only six months, so a written demand to preserve evidence needs to go out early.
Determining who may share responsibility
The truck driver may have stopped in a travel lane or turned across traffic without enough room. The motor carrier may have skipped inspections or left a damaged guard in service. A leasing company, repair shop or manufacturer can also share blame, depending on who controlled the equipment.
Illinois follows a modified comparative fault rule, so your damages drop by your share of the fault and disappear if that share passes 50%. Insurers tend to blame the trailing driver, so claims involving underride collisions turn on evidence about lighting and stopping distance.
Preparing for the long-term impact of serious injuries
Catastrophic injuries have a long tail. A brain injury can look stable at discharge and surface months later as memory problems or an inability to do your job. Settling before your doctors can describe your likely recovery risks leaving attendant care, home modifications and lost earning capacity out of the number.
In most Illinois injury cases, you have two years from the accident date to start a lawsuit. Claims involving a local government may have a shorter filing period. Keep every medical record, follow your treatment plan and have the evidence reviewed before you accept an offer.
