The Oklahoma state highway system includes many state highways that act as short spur and connector routes off some of the U.S. highways that pass through the state. These highways generally bear the same number of the U.S. highway they connect to with a letter suffix.
U.S. Route 412 is an east–west United States highway, first commissioned in 1982. U.S. 412 overlaps expressway-grade Cimarron Turnpike from Tulsa west to Interstate 35 and the Cherokee Turnpike from 5 miles (8.0 km) east of Chouteau, Oklahoma, to 8 miles (13 km) west of the Arkansas state line. It runs the entire length of the Oklahoma Panhandle and traverses the Missouri Bootheel.
U.S. Route 75 is a north–south U.S. Highway that runs 1,239 miles (1,994 km) in the central United States. The highway's northern terminus is located at the Canadian border near Noyes, Minnesota, at a now-closed border crossing. From this point, the highway once continued farther north as Manitoba Highway 75. Its southern terminus is located at Interstate 30 (I-30) and I-45 in Dallas, Texas, where US 75 is known as North Central Expressway.
U.S. Route 377 (US 377) is a 478-mile-long (769 km) north–south United States highway. Originally formed as a short spur to connect Denton, Texas with Fort Worth, Texas, it has since been extended to Oklahoma and Mexico.
U.S. Route 271 is a north–south United States highway. Never a long highway, it went from bi-state route to a tri-state route. Its southern terminus is in Tyler, Texas, at an intersection with State Highway 31 and SH 155. The highway's northern terminus is in Fort Smith, Arkansas, at an intersection with Business U.S. Route 71 and Highway 255. It enters Arkansas from Oklahoma as a controlled-access highway, but the highway continues as Interstate 540 when US 271 exits toward downtown after one-half mile (800 m) in Arkansas.
U.S. Route 270 (US 270) is a spur of US 70. It travels for 643 miles (1,035 km) from Liberal, Kansas at US 54 and US 83 to White Hall, Arkansas at Interstate 530 (I-530) and US 65. It travels through the states of Arkansas, Oklahoma, and Kansas. It travels through the cities of Oklahoma City, Oklahoma, Hot Springs, Arkansas, and McAlester, Oklahoma.
State Highway 66 is a 192.7-mile (310.1 km) state highway in the U.S. state of Oklahoma, beginning at U.S. Highway 81 in El Reno and ending at U.S. Highway 60 near White Oak. The highway was designated in 1985 as a replacement for the decommissioned U.S. Highway 66. Although most of the highway follows Historic Route 66, the highway follows US 66's final alignment, joining Interstate 44 through Tulsa and Oklahoma City, while older versions of the route follow various city streets through both cities.
State Highway 289, known for most of its length as Preston Road, is a north–south Texas state highway. It begins at the intersection of Preston Road and Loop 12/Northwest Highway in Dallas. The Preston Road designation comes from the fact that the highway generally follows the course of an older road known as the Preston Trail, which ran to the town of Preston [Bend]. Preston is now submerged by Lake Texoma. The road is known as Preston all the way north through the remainder of the Dallas-Fort Worth Metroplex to a junction with State Highway 56 west of Sherman, near the Oklahoma state line. Preston Road passes through many of the fast-growing northern Dallas suburbs, including Frisco and Plano, as well as Prosper and Celina, with many new housing developments being built along Preston.
State Highway 99 (SH-99) is a north–south state highway through central Oklahoma. It runs from the Texas state line at Lake Texoma to the Kansas state line near Lake Hulah. It is 241.5 miles (388.7 km) long. The highway overlaps U.S. Highway 377 (US-377) for over half its length.
State Highway 3, also abbreviated as SH-3 or OK-3, is a highway maintained by the U.S. state of Oklahoma. Traveling diagonally through Oklahoma, from the Panhandle to the far southeastern corner of the state, SH-3 is the longest state highway in the Oklahoma road system, at a total length of 615 miles (990 km) via SH-3E.
State Highway 51, abbreviated to SH-51 or OK-51, is a major state highway in Oklahoma, United States. It runs for 332.8 miles (535.6 km) east–west across the state, running from the Texas state line to Arkansas. It is the third-longest state highway in the system.
State Highway 33 is a state highway in the U.S. state of Oklahoma. It is a major highway that traverses most of the state, and at one time traversed its entirety. Its general orientation is west to east.
State Highway 91 is a state highway in the U.S. state of Texas that runs 13.6 miles (21.9 km) from Sherman through Denison to the Oklahoma state line at Denison Dam at Lake Texoma. This route was designated in 1994, the northern segment replacing State Highway 75A) and the southern segment designating the old route of U.S. Highway 75 which was rerouted and upgraded to freeway status. The highway is known locally as Texoma Parkway for much of its length, except through some parts of Denison. It is one of the main commercial strips in the Sherman-Denison metropolitan area.
State Highway 56 is a state highway in the U.S. state of Oklahoma. The road serves Seminole County, Okfuskee County, and Okmulgee Counties in central and east-central Oklahoma. In Seminole County, it is also designated as the Seminole Nation Highway in honor of the contributions the Seminole Nation has made to the state of Oklahoma.
State Highway 48 is a state highway in eastern Oklahoma that runs nearly 159.1 miles (256.0 km) from Bryan County to Pawnee County. SH-48 has one lettered spur, SH-48A, in Johnston County.
State Highway 82, abbreviated to SH-82 or OK-82, is a state highway in Oklahoma. It runs for 43.2 miles (69.5 km) north–south during its southern segment; and 99.2 miles (159.6 km) north–south during its northern segment.
U.S. Route 69 is a major north-south U.S. Highway in the U.S. state of Oklahoma. It extends the corridor formed by U.S. Route 75 in Texas, from Dallas northeast via McAlester and Muskogee to the Will Rogers Turnpike near Vinita. From Vinita to the Kansas state line, US-69 generally parallels the turnpike along old U.S. Highway 66.
U.S. Route 70 is a transcontinental U.S. highway extending from Globe, Arizona to Atlantic, North Carolina. Along the way, 289.81 miles (466.40 km) of its route passes through the state of Oklahoma. Entering the state south of Davidson, the highway serves Oklahoma's southern tier before exiting the state east of Broken Bow. It serves the cities of Ardmore, Durant, Hugo, and Idabel, as well as Tillman, Cotton, Jefferson, Carter, Marshall, Bryan, Choctaw, and McCurtain counties.
U.S. Route 60 (US-60) is a transcontinental U.S. highway extending from near Brenda, Arizona to Virginia Beach, Virginia on the Atlantic Ocean. Along the way, 352.39 miles (567.12 km) of the route lies within the state of Oklahoma. The highway crosses into the state from Texas west of Arnett and serves many towns and cities in the northern part of the state, including Arnett, Seiling, Fairview, Enid, Ponca City, Pawhuska, Bartlesville, and Vinita. US-60 exits Oklahoma near Seneca, Missouri. In Oklahoma, US-60 has three business routes, serving Tonkawa, Ponca City, and Seneca. The first 60.2 miles (96.9 km) of the route, from the Texas line to Seiling, is also designated as State Highway 51 (SH-51).
U.S. Route 412 is a U.S. highway in the south-central portion of the United States, connecting Springer, New Mexico to Columbia, Tennessee. A 504.11-mile (811.29 km) section of the highway crosses the state of Oklahoma, traversing the state from west to east. Entering the state southwest of Boise City, US-412 runs the length of the Oklahoma Panhandle and serves the northern portion of the state's main body, before leaving the state at West Siloam Springs. Along the way, the route serves many notable cities and towns, including Boise City, Guymon, Woodward, Enid, and the state's second-largest city, Tulsa.
U.S. Route 64 (US-64) is a U.S. highway running from the Four Corners area to the Outer Banks of North Carolina. Between these two points, the highway passes through the entire width of Oklahoma; a total of 591.17 miles (951.40 km) of US-64 lies in the state of Oklahoma. US-64 enters the state from New Mexico, crossing the line between the two states between Clayton, New Mexico, and Boise City in Cimarron County. The route runs the full length of the Oklahoma Panhandle, then serves the northernmost tier of counties in the main body of the state before dipping southeastward to Tulsa, the state's second-largest city. From Tulsa, the highway continues southeast, leaving Oklahoma just west of Fort Smith, Arkansas. In addition to Tulsa, US-64 serves fifteen Oklahoma counties and the cities of Guymon, Woodward, Enid, and Muskogee.