Texas State Highway 15
State Highway 15 (SH 15) runs from the Texas-Oklahoma boundary east of Follett to US 54 in Stratford. On October 26, 1954, SH 117 was redesignated as SH 15 for its entire route from the Texas/Oklahoma state line in Lipscomb County through the northeast Panhandle to an intersection with U.S. Highway 287 at Claude. The route was renumbered to correspond to the connecting Oklahoma State Highway 15. On September 1, 1965, the section from Spearman southward was redesignated as SH 207, while SH 15 was rerouted westward to Stratford over cancelled routes SH 282  and FM 289. Route description. SH 15 begins at an intersection with US 54 in Stratford. It travels eastward through the far northern reaches of the Texas Panhandle, mainly through farmlands. The route passes through the towns of Spearman and Perryton, before exiting eastward into Northwest Oklahoma, where the road transitions to Oklahoma State Highway 15. Previous route. SH 15 was one of the original twenty five state highways proposed on June 21, 1917, overlaid on top of the Dallas-Louisiana Highway. From 1917 the routing mostly followed present day U.S. Highway 80 from Dallas to Wills Point. It continued  on, routed along present day SH 64 from Wills Point into Tyler and up U.S. Highway 271 into Gladewater, and east along US 80 into Longview. On June 17, 1918, the section of SH 15 from Gladewater to Longview was transferred to SH 11. On January 21, 1919, an alternate route of SH 15 was designated east of Wills Point, going through Mineola to Gladewater, via US 80. SH 15 was extended east to the Louisiana border on August 21, 1923, replacing a section of SH 11. In 1926, U.S. Highway 80 was routed over SH 15. The routes were  marked concurrently. On December 16, 1929, SH 15 extended west to Fort Worth. On June 24, 1931, this extension to Fort Worth was cancelled. On September 11, 1934, SH 15 extended west back to Fort Worth. On August 8, 1935, SH 15 was extended west via Albany via Seminole to the Texas-New Mexico boundary, replacing SH 83 and part of SH 1A, though this was not effective until September 1, 1935. On September 26, 1939, the section of SH 15 east of Albany was deleted (already part of US 80 and US 80 Alternate). The remainder of SH 15  was redesignated as US 180 on September 6, 1943.