According to Mothers Against Drunk Driving (MADD), American motorists share the road with about two million drivers who have been convicted of drunk driving three or more times, and about 400,000 of them have five or more convictions. "The criminal justice system's 'catch and release' approach to drunk driving remains a huge threat to public safety," said Laura Dean-Mooney, national president of MADD. To prevent those convicted of drunk driving from repeating the offense, MADD calls for ignition interlocks for even first-time offenders. The interlocks require the driver to pass a breath-alcohol test and be free of alcohol before the vehicle will start. Less than 10 states have such a law. MADD based its figures on data reported to the National Highway Traffic Safety Administration (NHTSA) by about 20 states, as well as information for three more states provided by other sources.