Types of Semi Truck Accidents Semi trucks are heavy due to their size and weight , and can easily roll over at any speed. These accidents can cause serious injuries for those involved. Driver error is the leading cause of semi-truck accidents. Rollover crashes can also be caused by other causes. Rear-End Collisions If a vehicle rears into another it can cause serious damage. This is especially true when commercial or semi-truck is involved. These vehicles can weigh as much as 80,000 pounds, and may cause serious injuries to passengers or driv