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
A speed limit of had been imposed in May 1939 to save fuel; during the war this was lowered to , and private cars were allowed on the autobahns only in exceptional circumstances. (By 1943, traffic was so low that bicycles were permitted.) Other than official traffic, which picked up toward the end of the war, the autobahns were used for some deliveries of tank parts and finished U-boats and motor-boats, and as runways for fighter planes, including in one case for final assembly and test flights of Messerschmitt Me 262s after the factories in Augsburg and Regensburg were bombed. As the war progressed, vehicles were at risk of strafing by Allied aircraft. However, most damage to the autobahns was caused late in the war by the retreating Wehrmacht, which blew up numerous bridges in an effort to slow the Allied advance; on March 19, 1945, Hitler ordered the destruction in retreat of "all military, transportation, news, industrial, and provisions facilities".