> What the driver is not going to do is pull over at an exit to stop the car and check if that was the exit they were supposed to take, and then get back on the

> What the driver is not going to do is pull over at an exit to stop the car and check if that was the exit they were supposed to take, and then get back on the highway and keep going. Funny you should say that, its exactly what people did not too long ago. You'd look up where you were going in a key map or more broadly a road atlas, write down your instructions (and keep it open to the final destination in case of road closures, etc) I really don't see the appeal of getting in a car and beginning to drive without knowing where you're going. "I'll look it up on the road" just seems like an intersection of anxiety (deliberately increasing your chance of crashing), annoyance (deliberately making your navigational search harder to perform), and apprehension (increasing the chance you'll miss a crucial turn early in the trip due to lack of navigation). It's like choosing to juggle while taking a test.