Changes

Take bus 13 tram 7 or 14 8 to Schlossmatte, for example from Hirschengraben near the train station. Backtrack a bit and turn right down Huberstrasse, before you turn right again and follow Weissensteinstrasse until you see the motorway signs. This isn't a very good spot as several directions meet very close to the on-ramp, but by working with signs, you can still get a ride down towards Lausanne.