MARTA trains are just one more familiar sight during the average Atlantan's commute these days. But it wasn't always that way. Prior to 1979, taking the train to work wasn't an option in the city after the demise of the streetcars. But MARTA had been planning a rapid rail system throughout the 1970s and by decade's end, the first trains hit the tracks. For that to happen, however, lots of construction was in the offing.