The Bundesstraße 30 (abbreviated B30) is a highly frequented federal highway in Germany running through Upper Swabia in Baden-Württemberg from Ulm to Friedrichshafen on Lake Constance.

[1] The B30 starts at Ulm, passing the cities of Laupheim, Biberach an der Riß, Bad Waldsee, Weingarten and Ravensburg, terminating at Friedrichshafen.

Originally designated as Württembergische Staatsstraße 49, during the re-numbering of the road network in 1932, it became Reichsstraße 30 with the maintenance being taken over by the Reichsstraßenverwaltung in 1934.

Lorries trying to avoid the motorway toll by using federal highways, have caused an increase of traffic on secondary roads.

During the various holiday seasons, many motorists, trying to evade heavy traffic on the motorways nearby (A7 and A96), contribute, in conjunction with the increase in lorries, to additional congestion.

Since 1963, the state of Baden-Württemberg aims in the long term to convert the B30 first into a motorway-like federal highway and consequently into the motorway A89.

Due to the extension of the road network in the former German Democratic Republic, funding for traffic projects in the state of Baden-Württemberg was cut severely.