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 late 2015, Winfried Hermann, Baden-Württemberg's Green minister of transportation, promised to impose a trial speed limit of on about 10% of the state's autobahns beginning in May 2016. However, the ruling green-social democratic coalition lost its majority in the March 2016 elections; while Mr Hermann retained his post in the new Green – Christian Democratic government, he put aside preparations for a speed limit due to opposition from his new coalition partners.