Originally Posted by
ScottFromWI 
Think of it this way. There are roughly 250 million passenger vehicles in the US currently registered. An IID costs about $200-$300 to install and $800-$1000 a year for monthly maintenance and fees. That would cost over 2 TRILLION dollars a year just for the devices. Not to mention the costs of implementation, enforcement and management.
that is for people with duis though..they jack up the price because most of it goes to the state...