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.
Autobahn
Only federally built controlled-access highways with certain construction standards including at least two lanes per direction are called "Bundesautobahn". They have their own white-on-blue signs and numbering system. In the 1930s, when construction began on the system, the official name was "Reichsautobahn". Various other controlled-access highways exist on the federal "(Bundesstraße)," state "(Landesstraße)," district, and municipal level but are not part of the "Autobahn" network and are officially referred to as "Kraftfahrstraße" (with rare exceptions, like A 995 Munich-Giesing–Brunntal). These highways are considered "autobahnähnlich" (autobahn-like) and are sometimes colloquially called "Gelbe Autobahn" (yellow autobahn) because most of them are "Bundesstraßen" (federal highways) with yellow signs. Some controlled-access highways are classified as "Bundesautobahn" in spite of not meeting the autobahn construction standard (for example the A 62 near Pirmasens).