There is probably a market for some of The Knowledge folks. Someone gets into a cab, announces their destination, and the cell phone in the back seat transmits

There is probably a market for some of The Knowledge folks. Someone gets into a cab, announces their destination, and the cell phone in the back seat transmits his voice to The Knowledge person sitting in an air-conditioned office at a PC. That person then uses his knowledge and skills, combined with a live street map of actual traffic conditions right now, to put a path into the driver's GPS. I'm hand-waving that this market would support maybe a quarter of the old positions for a while. It's probably time to restrict new entrants and let the current workers attrition out.