That might just have been a failure with the GPS -- I've had the same issue before, but the car icon was offset a bit from the highway, so it looked like I was

That might just have been a failure with the GPS -- I've had the same issue before, but the car icon was offset a bit from the highway, so it looked like I was constantly driving on the grass next to it (that must have come as a surprise to the little imps inside my phone doing the navigating).