By definition, a side-impact collision is defined by the front of one vehicle running into the side of another (aka broadsiding). There are only a few inches between a driver (or front-seat passenger) and the door frame, and the window. If you are the victim of this type of car accident, it can be terrifying and cause significant injury or even fatality.
In order to avoid a side-impact collision you should:
Use caution at blind corners where you cannot see oncoming traffic.
Slow down when coming up to an intersection, even if the light is green.
Drive defensively to avoid being the victim of another driver’s mistakes.