Our "subway" was built about 20-25 years ago & runs from one end of the city into downtown, it's a straight line about 3 miles long.
Completely useless. I've never even been on it.
One of the problems in the U.S. is urban sprawl. People keep moving - to bigger houses, bigger yards, bigger everything, farther & farther away from the city. Then they buy bigger SUV's with bigger gas tanks & drive their bigger asses to & from work cuz they moved so friggin far away they can't catch a bus or train near their home.