Texas State Highway Spur 421

State Highway Spur 421 (Spur 421) is a state highway spur in the San Antonio, Texas, USA metropolitan area.^[1]

State Highway Spur 421
Route information
Maintained by TxDOT
Length	6.013 mi[1] (9.677 km)
Existed	1965–present
Major junctions
South end	I-10 / US 87 in San Antonio
North end	I-410 / SH 16 in Leon Valley
Location
Country	United States
State	Texas
Counties	Bexar
Highway system
Highways in Texas Interstate US State Toll Loops Spurs FM/RM Park Rec
← Loop 420 → Spur 422

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.^[1][2]

History

Spur 421 is a former route of SH 16, and was designated (along with Spur 422) on November 16, 1965, after SH 16 was rerouted around the west side of San Antonio along the Loop 410 freeway.^[1] The section of Spur 421 south of Callaghan Road was proposed for decommissioning in 2014 (Spur 421 would have also replaced the section of SH 16 north to Eckhert Road as well) 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.^[3]

Major intersections

The entire route is in Bexar County.

Location	mi[4]	km	Destinations	Notes
San Antonio	0.0	0.0	I-10 / US 87	Southern terminus; continues as Culebra Road
	0.6	0.97	Zarzamora Street
	1.5	2.4	24th Street / Wilson Boulevard
	1.6	2.6	Bandera Road / Culebra Road west – St. Mary's University	Route continues along Bandera Road
	2.1	3.4	Cincinnati Avenue – Woodlawn Lake
	2.3	3.7	General McMullen Drive / Saint Cloud Road
	2.6	4.2	Woodlawn Avenue
	3.9	6.3	Hillcrest Drive
	4.8	7.7	Evers Road
	5.2	8.4	Callaghan Road
Leon Valley	6.0	9.7	I-410 (Connally Loop) / SH 16 south
			SH 16 north (Bandera Road)	Northern terminus and continuation
1.000 mi = 1.609 km; 1.000 km = 0.621 mi

See also

• List of highways in San Antonio, Texas
• List of state highway spurs in Texas

References

1. Transportation Planning and Programming Division (n.d.). "State Highway Spur No. 421". Highway Designation Files. Texas Department of Transportation. Retrieved January 2, 2011.
2. Transportation Planning and Programming Division (2018). Texas County Mapbook (PDF) (Map) (2018 ed.). 1:72,224. Texas Department of Transportation. p. 1868. Retrieved December 14, 2022.
3. Davila, Vianna (November 20, 2013). "City officials say no to TxDOT turnback program". San Antonio Express-News. Retrieved August 10, 2020 – via MySA.com.
4. "Overview map of Texas State Highway Spur 421 Distances Between Interchanges" (Map). Google Maps. Retrieved January 7, 2011.