Salzburg is a medium-sized town in the center of Austria, very close to the German border. It has direct motorway connections to Vienna, Munich and Slovenia (Villach). Most of the traffic between southern Germany and Austria, especially Germans going for holidays, to the Croatian coast passes Salzburg.
When you want to go over the A1, no matter which direction, you should go to the ramp Salzburg Mitte at the Münchener Bundesstrasse (B155). There is a lot of traffic and enough place to be seen and for cars to stop. From the town center it's 20–30 minutes walking, but you can also take the bus #4 to Schmiedingerstraße.
Another good spot is a bus-stop near the end of Bahnhofstrasse, where the Landstrasse crosses the Salzburger-Bundesstrasse, just before the small railroad tunnel. Walk north from the main railroad-station in the city center (10-15 minutes), then follow the Bahnhofstrasse until you arrive at the Landstrasse. This spot is especially good for direction East.
When traveling to Graz, the best option might be to follow the A1 towards Linz. Swap to the A9 at the petrol-station left at the crossing 'Voralpenkreuz'. Your driver can continue its normal route from there towards any direction. The A9 towards Graz is a nice tour with many tunnels.
Take bus #3 to the terminus then walk south along Alpenstraße to the junction with the A10.
I took this bus number 3 to the terminus. But then you have to walk a little back. It is better to get out of the bus 2 stops before the terminus. - Robbel 16:28, 24 April 2012 (CEST)