A traffic collision is when two or more vehicles bump into each other while they are driving on the road. It can happen when one car doesn't slow down in time or when two cars try to drive in the same spot at the same time. It can also happen when the drivers aren't paying attention to the road and end up driving too close to each other. When a traffic collision happens it can cause a lot of damage to the cars and the people inside them. It can also cause traffic to be slowed down because other drivers have to steer around the accident.