Székesfehérvár

Székesfehérvár is a town in Hungary located at the M7 between Budapest and Balaton.

hitching to the north side of Balaton

You should walk to the north of town, following Palotai ut or Szent Florian Körüt. At the end of the town, there is a roundabout where the only main road on the north side of Balaton starts. Use a sign, saying Veszprem. Once you're in the rural areas you can hitch with a thumb everywhere, people there are very likely to pick you up.