Driving a car is considered a privilege -- and a state won't hesitate to take it away if a driver behaves irresponsibly on the road. A state may temporarily suspend your driving privileges for a number of reasons, including:
In addition, many states use a "point" system to keep track of a driver's moving violations: Each moving violation is assigned a certain number of points. If a driver accumulates too many points within a given period of time, the department of motor vehicles suspends her license.
If you have too many serious problems as a driver, your state may take away (revoke) your license altogether. If this happens, you'll have to wait a certain period of time before you can apply for another license. Your state may deny your application if you have a poor driving record or fail to pass any required tests. For more information, see Nolo's article Traffic Fines, License Suspensions, and Traffic School.
Finally, a few states revoke or refuse to renew drivers' licenses of parents who owe back child support.