Types of Semi Truck Accidents Semi trucks are heavy due to their weight and size. They can easily roll over at all speeds. These accidents can result in serious injuries for those involved. Driver error is the most common reason for semi-truck accidents. But, other factors can also cause an accident involving a rollover. Rear-End Collisions If a vehicle rears into another, the result can be severe damage. This is particularly true if a semi-truck or commercial truck is involved. These vehicles can be as heavy as 80,000 pounds and can cause se