Types of Semi Truck Accidents Semi trucks are heavy due to their size and weight , and can easily be rolled over at any speed. These accidents can cause serious injuries to those involved. Driver errors are the main reason for semi-truck accidents. But, other factors can also contribute to an accident involving a rollover. Rear-End Collisions If a vehicle rear-ends a vehicle the result could be severe damage. This is especially relevant when a commercial vehicle like a semi-truck is involved. These vehicles can be as heavy as 80,000 pounds, a