Texas State Highway Spur 537
Spur 537 was a state highway spur in San Antonio, Texas. Route description. Spur 537 began at an intersection with Loop 410 and San Pedro Avenue in Uptown San Antonio, near North Star Mall. It followed San Pedro Avenue northbound until its terminus at the US 281 freeway, just west of the runways of San Antonio International Airport. The junction with US 281 is incomplete by design: northbound San Pedro Avenue merges onto the northbound lanes of US 281, while the beginning of southbound San Pedro Avenue is only accessible via an exit from southbound  US 281. History. Spur 537 was designated on February 23, 1978, along with Spur 536, after US 281 was rerouted along the McAllister Freeway through the north side of San Antonio. The Spur 537 designation, along with those of several other routes in Bexar County, was cancelled on December 18, 2014; control was returned to the city of San Antonio as part of TxDOT's San Antonio turnback program, which gave 21.8 miles of roads to the city. The cancellation occurred when the project along the road was completed.