Around here the breathalyzers they hook into your ignition require you to blow every 10 or 15 minutes or so while you are driving. If you don't blow then you get lights and sirens going off and your engine shuts off.
You also have to hum into it for a few seconds so they know you just don't have an air compressor hooked up to it.
How's that for a first post? Howdy folks!
