Ignition Interlocks have been mandated for some in Pa. for 16 years: How'd That Work Out? Pennsylvania has required ignition interlock devices for repeat drunk-driving offenders who have completed ...

An interlock device is a piece of equipment installed on a vehicle that requires the driver to provide a breath sample to analyze for alcohol traces. Any alcohol measured over a .03 (the legal limit ...

Since 1993, laws in all 50 states put ignition interlock systems in the cars of some drunken driving offenders. If the device detects alcohol on a driver’s breath in excess of the legal limit, the ...

Last month’s column introduced the concept of an interlock. An interlock is a dependency between two processes. Process 2 cannot operate unless Process 1 is in a certain state. For example, if a ...