Night, hell tell me how it works in snow, with fully covered roads. I would love to see how they make that leap that people do when looking at situations where the road is fully obscured, but you know exactly where its at based on objects your used too (like mailboxes/trees/etc) GPS ain't that accurate.
Computers can remember more objects better, recall them faster and calculate your position against them with much more detail, as well as apply inference rules to correct for any missing/moved objects much better than humans can.
