The three biggest causes of car wreck accident injury are: Collision with another vehicle – This type of crash happens when a driver’s speed and ability to control the vehicle is compromised. As in, they’re driving too fast or not paying attention to what’s happening on the road. Collision with an object – Another common cause of car crash injuries is colliding with something in the roadway. It could be another vehicle, a pedestrian, or anything else that occurs while you’re driving down the street. T-bone collision – A T-bone collision occurs when two vehicles collide head-on at perhaps 45 miles per hour (about 70 kilometers per hour). The impact of this kind of collision is very severe, causing most injuries sustained in car accidents.