From the mid-20th century to the present day, time lost in traffic has become one of the primary sources of frustration in urban life. Historically, the classic formula for combating this problem has been to add more and more car lanes and build overpasses, based on the unfulfilled promise of improving traffic flow.
This consequence is well documented: every new car lane added represents a barrier to other modes of transportation and means longer travel distances for everyone. The result is induced demand—an invitation for more and more people to travel by car.
