Autobahns of Austria
Unlike German autobahns, on Austrian autobahns a general speed limit of 130 km/h (81 mph) is set, although as of August 25, 2018, the FPÖ government has been going on a trial for a possible speed limit increase to 140 km/h (87 mph) on the Autobahn 1 freeway. They may only be used by powered vehicles that are designed to achieve at least . While on the motorway voluntary stops, U-turns and backward driving are prohibited.
Reichsautobahn
The specifications for the autobahns were based on those developed by HAFRABA. They were designed as four-lane limited-access highways, with a central median, road surfaces in each direction normally wide (widened on some major segments immediately before the war), surfaced in concrete. There were no shoulders. In addition to having no intersections, the route was to limit grades as much as possible, to no more than 8%, and curves were to fall within a range of and in radius. One segment just south of Dessau of roughly 10 km in length was designed for speed record attempts (the "Dessauer Rennstrecke") and had six lanes in each direction.