> Not every city is laid out according to sound urban planning principles […] Well… they were laid out according to the "sound" urban planning principles of th

> Not every city is laid out according to sound urban planning principles […] Well… they were laid out according to the "sound" urban planning principles of the 1950s and 1960s. Their soundness is currently being re-evaluated since the previously-unknown/ignored externalities are now being taken into account.