While I'm all for the app, I think this is faulty reasoning. Checking an app for checkpoints and devising an alternate route when you're so drunk that you call

While I'm all for the app, I think this is faulty reasoning. Checking an app for checkpoints and devising an alternate route when you're so drunk that you call an ex-girlfriend at 1AM is one matter, but there are plenty of people with over-the-legal-limit lagged reaction times who shouldn't be driving yet are able to parse out the info from an app.