A traffic collision, also known as a traffic accident, motor vehicle collision, motor vehicle accident, car accident,automobile accident, auto accidents, road traffic collision, road traffic accident, wreck, car crash occurs when a vehicle collides with another vehicle, pedestrian, animal, road debris, or other stationary obstruction, such as a tree or utility pole. Traffic collisions may result in injury, death, vehicle damage, and property damage. A number of factors contribute to the risk of auto accidents, including vehicle design, speed of operation, road design, road environment, driver skill and/or impairment, and driver behavior.