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The default speed limit, posted as the "State Speed Limit", is 55 mph, which is in effect unless otherwise posted or in the absence of speed limit signs. [123] The New York State Department of Transportation sets speed limits in the vast majority of the state. Counties and most towns must petition DOT to change a speed limit.
The highest speed limit for undivided roads is 75 mph (121 km/h) in Texas. Undivided road speed limits vary greatly by state. Texas is the only state with a 75 mph (121 km/h) speed limit on 2 lane undivided roads, while most states east of the Mississippi are limited to 55 mph (89 km/h).
The project, along with a project to rehabilitate the pavement between Lawton to the Oklahoma City metropolitan area, is being done in order to raise the speed limit from 75 to 80 mph (121 to 129 km/h). A similar project was done for I-44 between Lawton and Texas state line. [10]
It was announced in February 2022 that the speed limit of the freeway would become 65 miles per hour (105 km/h) from 89th Street in Oklahoma City to just south of the SH-9 interchange in Norman. This change will make the speed limit consistent in the area, where it previously was not (some of the area had 70 mph [110 km/h] speed limits). [ 15 ]
The turnpike's speed limit is 80 mph (130 km/h) from I-40 south to north of US-270/OK-1, and from there to the southern terminus it is 75 mph (120 km/h). Law enforcement along the Indian Nation Turnpike is provided by Oklahoma Highway Patrol Troop XC, a special troop assigned to the turnpike.
Speed limit changes after deadly crash on rural Oklahoma County road
The posted speed limit is as high as 80 mph (130 km/h), making it possible to drive legally from Tulsa to downtown Oklahoma City in under 90 minutes. In addition to the Oklahoma City and Tulsa entrance points on the turnpike, other interchanges are located in Wellston, Chandler, Stroud, Bristow, near Kellyville and Sapulpa. Toll plazas are ...
U.S. Highway 69 crosses the Red River to enter Bryan County, Oklahoma concurrent with US-75 3 miles (4.8 km) [2] south of Colbert. The first few miles of highway north of the state line are freeway-grade, featuring three interchanges, including one at State Highway 91. Near Calera, the route downgrades to an expressway.