Original sentence: Design and engineering begin in 1973,existing properties were accquired and demolished in 1974-1975,actual construction begin in early 1976.The North-South line was built under Broad Street and the East-West line was constructed next to the railroad freight lines that run through Downtown Atlanta.The station was constructed using the cut and cover method
Edited sentence: Design and engineering begin in 1973, existing properties were accquired and demolished in 1974-1975, and actual construction begin in early 1976.The North-South line was built beneath Broad Street, and the East-West line was constructed next to the railroad freight lines that run through Downtown Atlanta.The station was constructed using the cut-and-cover method