 Waze is crowdsourced, and unless you're in a lonely place, Waze is going to tell you your real driving time based on current traffic. It can tell you the best time to depart for a trip. Other drivers can warn you of cars stopped on shoulders or accidents that are speed traps. But let us not neglect the more conventional map. If you're ever in London, stop in to see the map that changed the world. It's a hand-colored map. It's the first geological map that showed layers of strata can reveal the history of a place. It hangs on a wall in the Burlington House across Piccadilly Street from the well-known department store Fortnum & Mason.