ავტოსტოპერი

There's a big billboard near the exit where you can stand in the shade after 13:00 (once the sun has moved).

Best spot for going south, but it's very hard to reach by foot. Ask the locals to drop you off at "Offenburger Ei".

The parking lot is a barren wasteland for trucks only. The access road has a narrow side strip where cars can stop, but there's only industrial areas and tiny villages nearby, so if you travel on sunday like me, there are no cars at all. I tried standing behind the guard rail of the deceleration lane, but gave up after 2 hours and walked to the train station.