Override and underride collisions between tractor-trailers and smaller vehicles are among the most catastrophic types of traffic accidents. These incidents occur when the size and height discrepancy between large trucks and passenger cars result in devastating impacts. Due to the severe injuries and fatalities that frequently result, litigation following such accidents can be extensive and complex.

An override happens when a tractor-trailer runs over a smaller vehicle, either partially or completely. This type of accident commonly occurs in situations where a truck is following too closely, the truck driver fails to brake in time, or poor visibility leads to a failure to recognize a slowing or stopped vehicle ahead. Because of the massive weight and momentum of a truck, even a moderate-speed override collision can crush the smaller vehicle underneath, severely injuring or killing the occupants. Factors such as distracted driving, excessive speed, mechanical failures, or inclement weather can increase the likelihood of an override crash.

An underride occurs when a smaller vehicle crashes into the rear or side of a tractor-trailer and becomes lodged underneath. Rear underride accidents often happen when a truck stops suddenly and the vehicle behind is unable to brake in time. Side underride collisions are particularly dangerous when trucks make wide turns or cross lanes unexpectedly, and a passing vehicle inadvertently slides beneath the trailer. A lack of proper underride guards, poor lighting, or inadequate reflectors on the truck can make these accidents more likely and deadlier.

Liability in override and underride accidents often falls on the truck driver and, by extension, the trucking company employing them. If a truck driver is found to have been negligent — such as by speeding, tailgating, driving distracted, or violating federal trucking regulations — their employer can be held vicariously liable. Additionally, trucking companies may be directly liable if they fail to properly maintain their fleet, inadequately train drivers, or knowingly push drivers to exceed legally permitted driving hours, thereby increasing the risk of fatigue-related accidents.

Other parties may also be implicated in a lawsuit seeking damages for an override or underride crash. For example, if a truck’s underride guards were defective or missing, the manufacturer of the equipment may be liable for producing unsafe components. Government entities may bear responsibility if poor road design, lack of proper signage, or inadequate lighting contributed to the accident. Maintenance contractors who negligently performed repairs or inspections on the truck might also be liable if mechanical failures played a role in the collision.

Proving liability in these cases requires extensive investigation and legal expertise. An experienced truck accident attorney will conduct a thorough investigation, gathering such evidence as accident reports, witness statements, and black box data from the truck’s electronic logging device. Attorneys work with accident reconstruction experts to analyze skid marks, vehicle damage, and crash dynamics to determine how the accident happened. Attorneys may subpoena trucking company records to uncover potential violations of safety regulations, maintenance failures, or instances where drivers were pressured to meet unrealistic delivery schedules. Video footage from traffic cameras, dashcams, or surveillance cameras can provide useful insights into the moments leading up to the collision.

The law firm of Gesmonde, Pietrosimone & Sgrignari, L.L.C., with offices in Hamden and East Haven, has extensive experience helping victims of truck accidents get the compensation they need and deserve. Please call us at 203-745-0942 or contact us online for a free initial consultation.