It's very a very HAL 9000 move, having your vehicle admonish you to not drive after drinking, but that's just what the latest version of Nissan's Carwings navigation system for the Japanese market will do. Between the hours of 5:30 PM and 5:00 AM, the navigation system displays "Do not drive after drinking!" for five seconds after startup. During the day, the navi nanny merely gives the stern suggestion of "Let's continue safe driving today." We're almost expecting that firm "Hmm" at the end, like we used to get from our parochial school principal, but alas, there's even less personality in the Nissan than there was in our old pal Frank. Nissan's making an ongoing commitment to reducing drunk driving and increasing road safety, and this system is part of that effort. Anything that can be done to increase safety and reduce intoxication behind the wheel is a good thing, but we'd rather see a blunter message, something like "I'm sorry Dave, I can't do that."

[Source: Winding Road]