Yeah but, Taxi drivers usually don't hop around from place to place. They work in a specific metro area.

I assume there is enough variation to be aware of -- seasons change, constructions, car crashes, so you need to alter the route a bit. Today you have the maps with navigation, but I assume you still need to be quite aware on where to park, where is the best entrance to some places, etc. So you basically need to keep some fresh info on top of your mind.