 The largest recent change to the station is the building of a second double-track tunnel on the line to Römisches Theater station (formerly Mainz Süd) under the Kästrich.The reorganization of the lines in the old tunnel has not been finished yet.At a cost of about € 114 million over a five-year construction period to the end of 2003, the reception building and the station hall were reconditioned and partly rebuilt.