Brake checking, or suddenly braking when there is a car behind you, is illegal in most jurisdictions in North America. The act can cause considerable damage and put drivers at risk for serious injury or death.
It can also lead to severe legal penalties in certain areas, such as fines, jail time, and license suspension. People must be aware that brake-checking another driver is against the law and can have serious consequences if caught doing it.

Brake checking is illegal in many states as it can contribute to accidents.