The way to stop drunk driving is to make driving OPTIONAL. Without adequate pedestrian and cycling facilities, people are forced to use public transit and cars to get to bars and restaurants. Make public transit intermittent, unreliable and dirty then stop service well before bars let out? Now there is ONLY cars as an option. Ride share has helped but it is much more expensive and is almost as much as the bar tab.

Now they want to put stupid devices in people's cars that will randomly strand them in the middle of who-knows-where because they "Look Drunk."