==== First option ====
Take metro B (yellow line) to "Hůrka", walk around Albert shop, upstairs and over small bridge. Walk around the school maintaining the same direction. You will see a wall that hides the road we need to take, so go behind it. There is a bus stop and a big road. Cross it and continue right to the crossroads, there go left. You will see signs "Plzeň". Go over the bridge and down to the left. After the turn there is great place for hitchhiking. Alight, long and lot of space to stop. Although it's not allowed to stay there, police don't make troubles there.
==== Second option ====