As automatics routing software takes into account the extra information of traffic history with real time existing traffic conditions computers will do just as well or better than "The Knowledge Boys". Currently local experience with traffic is very useful, but as that information becomes available electronically and much more comprehensively the playing field will tilt even more to automated analysis. UPS already uses their combined driving history to save millions of man hours and millions of tanks of gas[1]. I have to imagine that Google and others can do even better with all of us implicitly telling routes and existing traffic conditions. Be interesting to know if Google is doing a/b testing with their routes in maps like they do with their website UI.
[1] http://www.bloomberg.com/news/2013-10-30/ups-uses-big-data-t...