State Highway 1 (Oklahoma)
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| Route information | ||||
| Maintained by ODOT | ||||
| Length: | 209.7 mi (337.5 km) | |||
| Existed: | 1968 – present | |||
| Major junctions | ||||
| West end: |
  US-177 / SH-199 east of Mannsville
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| East end: |
 AR 88 at the Arkansas state line |
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| Highway system | ||||
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Oklahoma State Highway System
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State Highway 1, sometimes abbreviated as SH-1, is a 209.7-mile (337 km) highway maintained by the U.S. state of Oklahoma. It travels through the southeastern part of the state, nicknamed Little Dixie. SH-1 is signed east and west.
SH-1 eastbound begins at US-177/SH-199 between Mannsville and Madill. It then winds northward to the town of Ravia, and becomes concurrent with SH-7 at through Mill Creek. Highway 7 splits off to the west soon after and SH-1 continues northward to Hickory, Oklahoma and Roff.
In Fitzhugh SH-1 becomes a multilane highway. It then becomes a freeway serving as part of a beltway around Ada. Through Ada it is briefly concurrent with US-377/SH-99.
After leaving Ada the highway becomes gradually more hilly and curvy, and turns northeast. Between the towns of Allen and Calvin, the road roughly follows the south bank of the Canadian River, though the river is not actually visible from the road.
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Wikipedia