 Rebuilding "Unterdöbling" station is proposed for the near future, as is extending the line south to the Reichsbrücke.The line was extended from Heiligenstadt to "Handelskai" in 1996, to allow for an easy connection to line "U6" of the Vienna U-Bahn.The "Vorortelinie" runs at headways of 10 minutes (daytime on weekdays), and is shown on maps (including U-Bahn maps) as a light green line.