Types of Semi Truck Accidents Due to their weight and size, semi trucks are top-heavy and can easily roll over at any speed. Accidents can cause serious injuries for the people involved. The most frequently cited cause of semi truck accidents is driver error. Rollover crashes can also be caused by other factors. Rear-End Collisions The possibility of serious damage is a result of a vehicle colliding with another vehicle. This is especially so if a commercial truck like a semi-truck is involved. These vehicles can weigh as much as 80 tons, and