XDA Developers: Google Maps tests a new alert for when your taxi goes off route. “These new off-route alerts in Google Maps will send an alert to your phone every time you get sidetracked from the intended course by 500 meters. Besides ensuring your safety, the feature should also help you avoid being tricked by a cab driver while traveling to an unfamiliar part of the city.” That happened to me in Boston once many years ago — I got absolutely hosed. I still love Boston anyway. Do not love that cab driver.