 When the CTS Rapid Transit (today's Red Line) opened in 1955 it used the same tracks but did not stop at East 34th; the station continued to exclusively serve the Shaker Rapid Transit until 1971.A high-level platform was added to the eastern end of the existing low-level platform to serve the CTS Rapid Transit, and this portion of the station opened on March 1, 1971.The CTS station was designated "Campus Station."