Oklahoma State Highway 15
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State Highway 15 is the name for two once-connected state highways in Oklahoma. One begins at the Texas state line and runs for 47.1 miles through Woodward; the other runs for 62.4 miles between U.S.
SH-15 just east of I-35
U.S. Route 177
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U.S. Route 177 is a spur of U.S. Route 77. It currently runs for 233 miles from South Haven, Kansas at US 81 to Madill, Oklahoma at US 70. It passes through the states of Kansas and Oklahoma.
Oklahoma State Highway 15
…has a five-mile (8.0 km) concurrency with U.S. Highway 77. After leaving US-77, it passes through Red Rock, and has a 4 miles (6.4 km) concurrency with US-177, and splits off just north of the intersection with the Cimarron Turnpike. It bridges Sooner Lake and runs for 15 more miles (24 more km) before ending…
US 177's southern terminus near Madill, Oklahoma
US 177's northern terminus in South Haven, Kansas