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
Urban districts by default are posted at . Outside of the municipal limits, two-lane state and federal highways have a speed limit of unless otherwise posted, and 2 lane county roads have a speed limit of unless otherwise posted. In June 2015, the Arkansas Highway Commission authorized the Arkansas Highway and Transportation Department (AHTD) to raise the speed limit on undivided 4 and 5 lane roads from while divided 4 lane roads are set to go from , these changes affect of Arkansas highways. Furthermore, AHTD has established freeway default speed limits. Along rural freeways the limit is while suburban freeways are posted at . School zone speed limits apply only when children are present, or when a lighted beacon is on if one is provided and such speed limits are set at unless otherwise posted. It is fairly common however that schools serving only higher grade levels will not have a school speed limit in rural areas or where such school sits more than off of the highway or street.