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I-410 San Antonio Area Freeway System
Interstate 410 (John B. Connally Loop)

This page last updated September 9, 2018

I-410 highlight map This page covers Interstate 410 (Loop 410) from the Fratt Interchange (at I-35 north of Walzem) counter-clockwise around the central city to the 410 South Cutoff (at I-35 near Rittiman). From there, Loop 410 continues north concurrent (multiplexed) with I-35 to the Fratt Interchange, but because the I-35 mile markers and exit numbers are used along that stretch, information on that segment can be found on the I-35 North page.

Length: 49 miles (53 miles including the concurrent section on I-35)


On this page

(Not yet available)
Lanes Access
Special features
& notes
Traffic Media


Interstate 410, known locally as Loop 410 or just "The Loop", is really a tale of two freeways. The southern half (south of US 90) generally demarks the edge of the city and resembles and functions more like a rural or urban fringe Interstate than an urban freeway. Meanwhile, the northern arc is the most heavily traveled freeway in the region and is home to a major chunk of the area's suburban office space and several major shopping centers. The Loop also provides access to San Antonio International Airport, the South Texas Medical Center, the Southwest Research Institute and Texas Biomedical Research Institute, the Westover Hills area and Sea World of Texas, the National Security Agency campus, Ft. Sam Houston, Lackland AFB, Brooks City-Base, Stinson Municipal Airport, the San Antonio Missions Trail National Park, Palo Alto College, Texas A&M University - San Antonio, the Toyota assembly plant and adjacent facilities, and the cities of Castle Hills, Balcones Heights, Leon Valley, Kirby, and Windcrest.

Land along the northern arc is heavily developed. Office towers, shopping malls, hotels, and other commercial developments dominate the landscape, interspersed with dense residential areas. South of US 90, development is much more dispersed with large tracts of vacant land, although this area has been seeing new growth in recent years.

In 2010, TxDOT completed a major decade-long program to expand Loop 410 to 10 lanes across the Northside of San Antonio.

Loop 410 intersects with I-35 North at two places: Loop 410 North intersects I-35 north of Walzem Rd. at the Fratt Interchange, and Loop 410 East intersects I-35 south of Rittiman Rd. at the 410 South Cutoff. Both highways run concurrent (multiplexed) between these interchanges.

Roadway details

I-410 lanes map
  • 6 lanes from I-35 (Fratt Interchange) to Perrin-Beitel
  • 10 lanes from Perrin-Beitel to Evers with a short 8 lane section through the I-10 interchange
  • 8 lanes from Evers to Ingram
  • 6 lanes from Ingram to Valley Hi
  • 4 lanes from Valley Hi to I-35 North (410 South Cutoff)
I-410 access roads map
  • Continuous access roads along entire route except at:
    • I-35 South
    • Both sets of railroad tracks just west of I-35 South
    • I-37 South
    • I-10 East
    • FM 78
    • Eastbound access road through-traffic requires a left turn at Harry Wurzbach
    • Southbound access road turns to become northbound I-35 access road near FM 78 and Binz-Engleman Rd.

Click here for a list of I-410 exits.

I-410 speed limit map
  • 60 mph between I-35N and I-10E
  • 65 mph north of US 90
  • 70 mph south of US 90
I-410 special features map
  • TransGuide coverage from I-35 North to Culebra
  • VIA Metropolitan Transit Park & Ride locations:
    • Randolph: Fratt Interchange
    • Crossroads: I-10 West
  • Left exit from northbound I-410 to southbound I-35/Binz-Engleman
  • No directional interchange at SH 151
  • Route number concurrency (multiplexes):
    • 4 miles of Loop 410 concurrent with I-35 North from Fratt Interchange to 410 South Cutoff
    • 16 miles of SH 16 concurrent along western arc from Bandera Rd. to Poteet-Jourdanton Hwy.
    • 3 miles of US 281 concurrent from I-37 to Roosevelt
    • 20 miles of SH 130 concurrent from I-35 South to I-10 East
I-410 traffic map
Traffic volume legend

Very heavy along northern arc (US 90 West to I-35 North). The northern section has been San Antonio's busiest or second busiest freeway for over two decades with counts currently exceeding 250,000 vehicles per day between Ingram and Nacogdoches. Much of the chronic congestion along this stretch has been eased with the completion of several expansion and interchange projects over the past decade. However, that expansion has now drawn significant increases in traffic, especially between I-10 West and US 281 North. Recurring morning congestion occurs northbound between US 90 and I-10. Evening peak congestion occurs southbound from Bandera to SH 151 and eastbound approaching I-35 North.

The southern half carries generally moderate traffic. However, the southern arc has been seeing notable increases in traffic over the past decade.


LOCATION 1990 2006 2010 2014 2015 2016 '06-'16
Perrin-Beitel Rd.109,000114,000118,000128,580157,822158,235+38.80%
Nacogdoches Rd.155,000157,000147,000166,188205,441238,745+52.07%
McCullough Ave.187,000165,000200,000224,403259,477287,888+74.48%
Blanco Rd.190,000171,000208,000226,894257,227288,165+68.52%
Vance Jackson Rd.180,000172,000208,000230,440259,898267,412+55.47%
Evers Rd.142,000181,000157,000211,311254,746262,198+44.86%
S of Bandera Rd.116,000150,000159,000183,798196,376215,003+43.34%
N of US 90W79,000105,000101,000114,526124,728130,713+24.49%
Valley Hi Dr.51,00084,00088,00094,19699,495104,870+24.85%
Pearsall Rd.25,00050,00050,00059,38267,23669,592+39.18%
W of I-35S20,00044,00045,00050,45251,45161,898+40.68%
W of Poteet-Jourdenton Fwy.14,00031,00032,00037,78041,70942,955+38.56%
E of Poteet-Jourdenton Fwy.14,30035,00033,00040,43246,77848,302+38.01%
W of Roosevelt Ave.17,10038,00040,00043,51151,48952,846+39.07%
E of Roosevelt Ave.16,80036,00045,00046,76747,28348,479+34.66%
W of I-3718,70042,00052,00053,19757,79558,676+39.70%
E of I-3718,70044,00051,00052,23656,05155,721+26.64%
Southcross Blvd.22,00049,00055,00055,19160,59860,162+22.78%
S of E. Houston St.34,00058,00067,00071,08977,49777,087+32.91%
S of I-10E45,00073,00070,00074,84382,09981,768+12.01%
WW White Rd. N52,00078,00080,00072,35282,66682,263+5.47%
N of FM 7855,00069,00076,00064,79171,65272,245+4.70%

Media gallery

Click here for video of this freeway.

Construction projects

  • From Ingram to SH 151: Click here for details on this project.

Future plans

TxDOT has intermediate-term plans to expand the section from SH 151 to SH 16 South to eight or ten lanes and rebuild the I-35 South interchange. Those projects are listed as unfunded in the MPO's current 25 year plan. In the short-term, the first phase of a multi-level interchange at US 90 began construction in 2017; click here for information on that project. Also, work was completed in 2018 to build the first phase of a multi-level interchange at SH 151 and widen Loop 410 to eight lanes from Ingram to SH 151; infromation on that project is here.

The Loop 410/I-10 East interchange was recommended for non-specified improvements in the I-35 North Major Investment Study and also is listed as unfunded in the MPO's current 25 year plan.


The final I-410 designation was authorized by Texas Transportation Commission Minute Order 62561 (July 31, 1969). Named Connally Loop for Texas Governor John B. Connally. Connally, who served as governor from 1963 to 1969, was from the San Antonio area and was instrumental in helping the city during the HemisFair World's Fair in 1968. Loop 410 was the first Interstate loop in Texas to be completed.

The northeastern part of today's I-410 route was originally part of Loop 13, a loop that initially was built on the South Side to connect San Antonio's military installations. (The southern half of Loop 13 still exists today as WW White Rd and Military Dr. on the east and south sides.) The earliest sections of Loop 13 on the South Side appeared in 1938. The first extensions of Loop 13 that eventually became part of Loop 410 from FM 78 north to the Fratt Interchange and west to NW Military Hwy. opened sometime around 1952.  

In 1951, the first proposal to start extending the loop westward from NW Military Hwy. showed it running to the vicinity of the intersection of Fredericksburg Rd. and Callaghan Rd. By 1955, however, the present-day route from NW Military Hwy. around the west side of the city to I-35 South was proposed, as was the eastern arc from Rittiman Rd. south to New Sulphur Springs Rd. The first section to be completed was between Culebra Rd. and Bandera Rd. in 1956. Two segments from San Pedro Ave. to Fredericksburg Rd. opened in 1957 followed the next year by the section from Bandera Rd. to Fredericksburg Rd. and Culebra Rd. to US 90. These early sections were initially built as just access roads and were subsequently upgraded to full freeways in the early to mid '60s along with the earlier existing stretch of Loop 13 from NW Military Hwy. to I-35 North.  

The section from US 90 to I-35 South was opened in two parts in 1959 and 1960. The stretch from I-35S to S Presa St. opened in three segments in 1962 and 1963. The eastern arc from I-35 North south to S WW White Rd. was completed in 1964. The final section, from S Presa St. to S WW White Rd., opened with a ceremony in early 1966.

Interstate 410 was designated in 1959 and the recently-built sections of Loop 13 on the Northwest Side were renumbered accordingly. However, the section on the North Side between I-10 and I-35 was actually not included in the original Interstate 410 designation and therefore was designated and signed as State Loop 410 until it was finally officially designated Interstate 410 in July 1969. It's unclear why this designation was delayed.

The section from San Pedro Ave. to Harry Wurzbach Rd. was widened from four to six lanes in 1975, followed the next year by the section from San Pedro Ave. to I-10. The section from Harry Wurzbach Rd. to Perrin-Beitel Rd. was widened in 1981 and the section from I-10 to Ingram Rd. in 1982. The Fratt Interchange was rebuilt in a blockbuster project between 1980 and 1983. The section from Ingram Rd. to Valley Hi Dr. was expanded to six lanes ca. 1987. An extra lane was added westbound from I-10 West to Babcock Rd. in 1996. TransGuide coverage was added from Ingram Rd. to I-35 North in 1999. 

Plans were made in the mid '90s to again expand the northern arc of Loop 410. The first segment, from West Ave. to Cherry Ridge Dr., was expanded  in 1997; however, to minimize the bottleneck at each end, it was only marked as eight lanes initially. The section between McCullough Ave. and US 281 was widened and prepared for the planned 218/410 interchange in 2000 and 2001. The section from I-10 to Callaghan Rd. was widened to 10 lanes in 2003 and the section from West Ave. to Blanco Rd. widened to 10 lanes (eight lanes initially marked) in 2005. The section from Blanco Rd. to McCullough Ave. was widened to 10 lanes in 2008, and the section from Jones-Maltsberger Rd. to Broadway was widened to 10 lanes in 2009. The first ramp in the 281/410 interchange opened to traffic on June 18th, 2007 and the final ramps were opened to traffic on June 9th, 2008. Work on the I-10 West interchange, including widening the loop through the interchange to eight lanes, was completed in early 2009. The elevated Bandera Rd. connectors opened in May 2009 and work to widen the section from Callaghan Rd. to Ingram Rd. to eight lanes was completed shortly thereafter. The section from Culebra Rd. to Ingram Rd. was completed in late 2009 and the final section, from Nacogdoches Rd. to Austin Hwy, was completed in late 2010.

In September 2011, the Texas Transportation Commission approved extending the SH 130 designation along I-10 from the terminus of the SH 130 toll road east of Seguin to Loop 410, then south along Loop 410 to I-35 South. Signage was installed in 2013.

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This page and all its contents are Copyright 2018 by Brian Purcell

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