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.
Speed limits in the United States
The highest speed limits are generally on the West Coast and the inland eastern states, in inland western states, along with Arkansas and Louisiana, and on the Eastern Seaboard. Alaska, Connecticut, Delaware, Massachusetts, New Jersey, New York, Puerto Rico, Rhode Island, and Vermont have a maximum limit of , and Hawaii has a maximum limit of . The District of Columbia and the U.S. Virgin Islands have a maximum speed limit of . Guam, the Northern Mariana Islands and American Samoa have speed limits of . Two territories in the U.S. Minor Outlying Islands have their own speed limits: in Wake Island, and in Midway Atoll. Unusual for any state east of the Mississippi River, much of I-95 in Maine north of Bangor allows up to , and the same is true for up to 600 miles of freeways in Michigan. Portions of the Idaho, Montana, Nevada, South Dakota, Texas, Utah, and Wyoming road networks have posted limits. The highest posted speed limit in the country is and can be found only on the Texas State Highway 130.