Types of Semi Truck Accidents Due to their size and weight semi trucks are a top-heavy and are able to roll over at any speed. These accidents can cause serious injuries to the individuals involved. Driver error is the leading cause of semi-truck accidents. But, other factors can cause a rollover crash. Rear-End Collisions Serious damage can result from collisions between vehicles vehicle. This is especially true when commercial truck or semi-truck is involved. These vehicles can be as heavy as 80,000 pounds, and may cause serious injuries to