Texas State Highway Spur 421

State Highway Spur 421 is a state highway spur in the San Antonio, Texas, USA metropolitan area.

Route description

Spur 421 begins at an intersection with I-10 north of Downtown San Antonio. The route follows Culebra Road to the west before turning to the northwest along Bandera Road. The designation ends at Loop 410 and SH 16; southbound SH 16 follows the Loop 410 freeway, while northbound SH 16 continues along Bandera Road.

History

Spur 421 is a former route of SH 16, and was designated on November 16, 1965, after SH 16 was rerouted around the west side of San Antonio along the Loop 410 freeway. The section of Spur 421 south of Callaghan Road was proposed for decommissioning in 2014 as part of TxDOT's San Antonio turnback proposal, which would have turned back over 129 miles of roads to the city of San Antonio, but the city of San Antonio rejected that proposal.