You couldnt set a track in milton keynes, everyone would be confused by the one-way systems, and a 1 mile lap would take about an hour coz of the traffic!
Tracks have licenses as well as cars, introducing real tracks to LFS will cost money. Lots of it I would imagine. We have seen the arrival of the BMW Sauber and the Raceabout, maybe someday more real life cars/tracks will be added, who knows?
PS That was a stupid question, Scawen Eric and Victor know