Idaho State Highway 51 Idaho State Highway 51 State Highway 51 (SH-51) is a state highway in southwestern Idaho from Mountain Home south to the Nevada border, where it continues as State Route 225 to Elko. It is the major north–south road in Owyhee County. As currently configured in the state's official milepoint log, SH-51 terminates at the BL-84 intersection with American Legion Blvd., and is not otherwise officially concurrent/overlaid with BL-84 (where the signs at I-84's Exits 90 and 99 say "To SH-51/To SH-67") or the former section of US-20 that follows American Legion Blvd. to I-84/US-20 east at Exit 95. As of
Texas State Highway Spur 51 action was deferred, and later this plan of cancelling Spur 51 was gone. Texas State Highway Spur 51 Spur 51 is a state highway spur in Denton, Texas. It starts at State Highway 114 (SH 114), and ends on Elizabethtown Road. The road is not signed, but the designation has not been cancelled. The number originally belonged to Loop 51, designated on September 25, 1939, from U.S. Highway 77 (US 77) through Yoakum to US 77 (now Alternate US 77). The designation was changed to Business US 77-Q on June 21, 1990. The current route was designated on August 28,