Dear Friends,
When J. Edgar Hoover was alive, One of his critics wrote a book entitled, "No Left Turns." It seems that Hoovers chauffeur driven car was hit when it was in the process of making a left turn. An edict was sent out, whatever route the Director's car was on, it could make no left turns. This caused enormous difficulty for the FBI in plotting the routes that the Commissioner would take. In the rare event that a left turn could not be avoided, FBI personnel would have to block the intersection so that there would be no risk.
To Hoover, it seemed like a good idea - to his many critics it seemed insane. However he continued to hold his office. I hope that our computer directed routing has more and better motivation than Hoover's did.