I've been driven by cab in London to an address we later found was on the same physical street, it just changed name halfway. The folks at the destination laughed and said that while the cabbie should have just driven straight down the street, his actual route took us about four times the distance it should have...
It seems that The Knowledge isn't necessarily implemented for The Punters :)
There's knowing the quickest route to take and then there's taking the longest route you can get away with. Two different problems with the same data set.
It seems that The Knowledge isn't necessarily implemented for The Punters :)