When the remodelling work took place at the junction at Südbahnhof, from 11th to 15th August 2011, the O route was diverted from Rennweg along the 71 route and then, using the loop at St. Marx, it followed the 18 route to Schlachthausgasse. 3 arrives at St. Marx and, after using the loop, will pass from left to right across the picture.