Abstract
Efforts are underway to encourage alcohol interlocks for all impaired driving offenders [driving under the influence (DUI)] in the USA. Interlocks require breath-alcohol concentration (BrAC) tests and prevent engine startups when BrAC is above preset levels. Interlock programs have grown rapidly; however, the devices are only effective while installed. Clearly, we need to strengthen effectiveness while installed, but also to improve monitoring and extend the installed duration when there is evidence of persistent excessive drinking. Perhaps most importantly, we need to improve the safety benefits achieved while installed for long after interlocks have been removed. (Author/publisher)