I was watching a TV show the other night that had to do with traffic in major cities; the best and worst of them. New York City had one of the best systems as the streets are laid out in a rectangular grid. London had the worst street layout. It went on to describe the complexities of being a taxi driver in your fair city. It said a taxi driver has to spend three years or more memorizing the integrate street patterns before he can get a license. There was no mention of GPS. I wonder if GPS will be incorporated so cabbies won't have to memorize routes. It seems like an obvious place to start.