Loop 20

History

Loop 20 was designated on September 26, 1939 from US Highway 96 (US 96, later US 59, and now SH 359) to US 83 in Laredo as a renumbering of SH 12 Loop. On September 27, 1985, Loop 20 was extended from SH 359 to US 59. On August 29, 1996, it was extended north to FM 3464 two miles (3.2 km) east of I-35. On May 28, 1998, Loop 20 was extended west and southwest to the Mexico border, concurrently with part of FM 3464. On May 29, 2008, Loop 20 was to be rerouted south of SH 359 to US 83, with the old route (the original portion) to become Spur 260. The section from SH 359 to Mangana-Hein Road (seven miles [11 km]) opened in 2011, and as a result, the old route was officially signed as Spur 260. On August 29, 2013, a shortcut opened south of SH 359, with the old route becoming Spur 259. On February 27, 2014 the section from the entrance to the World Trade Bridge (0.6 miles west of FM 1472) to the intersection with US 59 was redesignated as US 59, but on July 31, 2014 the Loop 20 designation was restored on this section as a concurrency with US 59.