A multi vehicle crash usually begins when one car loses control, stops suddenly, follows too closely, or fails to react to traffic ahead.
The most common type is a rear end crash that becomes a chain reaction collision.
The initial impact in a multi-vehicle accident can push one vehicle into others or cause cars to swerve into adjacent lanes, creating a domino effect that leads to extensive damage and multiple injuries.
That sequence is what separates a multiple vehicle collision from a single rear end crash. One vehicle may hit the lead vehicle, then be struck by a third vehicle, while other vehicles swerve into adjacent lanes to avoid the initial collision.
The same sequence also changes liability. The negligent driver who caused the first crash may carry the largest share of fault, but that does not automatically decide responsibility for every later impact.
Each impact must be reviewed separately when three or more vehicles, several drivers, and several potentially responsible parties are involved in the same crash.