> The second period of subway building began in the 1960s. The downsides of the car and the infrastructure it required were becoming apparent, and some cities t

> The second period of subway building began in the 1960s. The downsides of the car and the infrastructure it required were becoming apparent, and some cities turned to subways to address the problems of traffic congestion. Metros built in this period include Atlanta’s MARTA in 1979, San Francisco’s BART, and Los Angeles’ Metro Rail. Miami's Metrorail deserves a mention: https://en.wikipedia.org/wiki/Metrorail_(Miami-Dade_County) https://en.wikipedia.org/wiki/Metrorail_(Miami-Dade_County)