DUI related collisions kill 13,000 people a year, so lets make millions of folks pay a little extra for some stupid gadget that the drunks will get around inside 5 min. No thanks, this smells like some special interest BS basking in the glow of a good cause.
Most of those who wipe out others are repeat offenders who have already been arrested numerous times, lost their license, spent time in jail, lost several cars, will be paying fines until well after death, and yet... they drive anyway, and they will drive anyway gadget, or no gadget. Esp the brokeasses who push a 20 year old crapbox down the road.
We had a very effective program against habitual DUI offenders, station volunteers (Explorer scouts / civilian volunteers / neighborhood watch peeps) would "steak out" these dudes cars and alert a dedicated unit should they see em drive.. we nailed em left and right, over 20 arrests the 1st month. The best part was how paranoid they got, thinking the man is always watching... but we lost the budget for that dedicated DUI unit to DARE (which is covered by Federal funds)... I could go on a rant on how Fed funds for local law enforcement is a total face, but I wont...