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.
Speed limits in the United States by jurisdiction
As of October 31, 2017, the speed limit law is being broken into four categories: rural interstates, Urban Interstates, rural divided unlimited access highways, and two lane highways. There are studies being made to increase rural interstate speed limits to 75 mph (121 km/h), urban interstate speed limits to a uniform 65 mph (105 km/h) speed limit, rural divided unlimited access highways to 65 mph (105 km/h) unless the DOT warrants a lower speed, and maintaining a 55 mph (89 km/h) speed limit with the option of increasing the limit to 60 mph (97 km/h) where higher speed limits can be warranted on two lane highways (as of July 1, 2018, no freeways in Arkansas have been increased to 75 mph).