A traffic accident, also known as a car crash or motor vehicle collision, is an incident that occurs when two or more vehicles collide with each other or with another object such as a tree, pedestrian, or animal. The term can also refer to accidents involving only one vehicle, for example if it collides with road debris or rolls over. Traffic accidents can result from various factors including driver error, reckless driving, poor weather conditions, mechanical failure, and other reasons. They often cause injury or fatalities and may lead to legal proceedings, insurance claims, and increased awareness about traffic safety.