Bundesstraße
One distinguishing characteristic between German "Bundesstraßen" and "Autobahnen" is that there usually is a general 100 km/h (62 mph) speed limit on federal highways out of built-up areas, as opposed to the merely advisory speed limit ("Richtgeschwindigkeit") of 130 km/h (83 mph) in unmarked sections of the autobahns. However, a number of "Bundesstraßen" have been extended as expressways (dual carriageways) (colloquially called "Yellow Autobahns"). Many of these have speed limits of usually 100–120 km/h, others have only an advisory speed limit like autobahns. Most sections of the federal highways are only single carriageway with one lane for each direction and no hard shoulder pull-out area.
Autobahn
In 2011, the first ever Green minister-president of any German state, Winfried Kretschmann of Baden-Württemberg initially argued for a similar, state-level limit. However, Baden-Württemberg is an important location for the German motor industry, including the headquarters of Daimler AG and Porsche; the ruling coalition ultimately decided a state-level limit on its of speed-unlimited roads—arguing for nationwide speed limit instead.