There is a third alternative finding drivers in westward direction: On B7, shortly before the interchange with A71 (Eisenacher Straße corner to Hersfelder Straße), there is a large IKEA furniture market where it should be possible to find more than a handful of drivers that can bring you to any place in the region.
== Hitchhiking in ==
As most people tend to pass Erfurt on Autobahn A4 ask to be dropped of at "Urbicher Kreuz". It's a five minutes ride from the exit "Erfurt-Ost". There you can catch the tram number 3 which takes you to the city center.