"America loves its freeways. After the 1956 Federal Highway Bill created the pathway for a 41,000 mile interstate highway system, states and cities jockeyed for the funding to build ever-more extensive networks of pavement that could carry Americans quickly between cities. Sometimes, they built these highways right in the middle of cities, displacing communities and razing old buildings and homes.
...But highways also created problems, some of which have become much worse in the years since. Urban freeways displaced communities and created air and noise pollution in downtown areas."