Types of Semi Truck Accidents Semi trucks are hefty due to their size and weight , and can easily be rolled over at any speed. These accidents can cause serious injuries to the people involved. Driver error is the most common reason behind semi-truck accidents. Rollover crashes can also be caused by other causes. Rear-End Collisions The possibility of serious damage is a result of a vehicle colliding with another vehicle. This is especially the case if a semi-truck or commercial truck is involved. These vehicles can weigh up to 80,000 pounds,