Go to the Basel “Hauptbanhof” (main train station) and take the number “50” bus, direction “Euroairport”. The second last stop ("Frachthalle") arrives at the St.Louis area which is beside the Swiss-French border. You will see that there is a police check point for cars. If you make your way to this area and stand at the side you should be able to interact with vehicles’ at a very slow speed. Look out for the police as they can be a nuisance but I had no problems.
You can also take the bus number 50 to "Friedrich-Miescher-Strasse" and walk down the hill. There you'll find the slip road for the motorway to franceFrance. In the morning and especally especially in the evening there is a ot lot of traffic. And just next to it, you find a colorful squat, where you can probably find a sleeping place for a night, if hitchhiking just doesn't work.
===North towards [[Germany]], [[Freiburg]]===
'''NOTICE:''' It might be useful to use a sign here or to ask people where they're going.. A few kilometres down the road there's a big crossing. You can choose between the direction [[Zürich]] and [[St. Gallen]] '''or''' [[Bern]] and [[Luzern]].
*A helpfull helpful cutout of a [http://map.search.ch/?x=-26526&y=-46151&z=512 map]