Types of Semi Truck Accidents Due to their size and weight, semi trucks are top-heavy and are able to roll over at any speed. These accidents can result in serious injuries to those who are involved. The most common cause of semi truck accidents is driver error. However, rollover accidents can be caused by other causes. Rear-End Collisions When a vehicle rear-ends another the result could be severe damage. This is particularly true when a commercial truck similar to a semi-truck is involved. These vehicles can weigh as much as 80,000 pounds a