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Aim higher, reach further. Get the Wall Street Journal $12 for 12 weeks. Cruising at 85 mph: Texas Opens Fastest Highway in U.S. Texas opened a 41-mile stretch of State Highway 130 today with a new speed limit of 85 miles per hour â the highest legal limit in the U.S.
Most highways in the U.S. top out at 75 mph, and there are no longer any roads in the U.S. with no speed limit like Germany's autobahn. Some highways in rural West Texas and Utah have 80 mph speed limits. The Texas Legislature last year approved 85 mph limits for some new stretches of road.