Antonio Area Freeway System
Interstate 35 South (South PanAm Freeway)
|This page last updated May 10, 2019
||This page covers Interstate 35 west and south of
downtown San Antonio from the I-10 West interchange to Loop
1604. For information on I-35 north of downtown, see the I-35 North page.
Length: 16 miles
the passage of
NAFTA and the boom of the Eagle Ford Shale oilfield south of San
Antonio, I-35 South has become an increasingly important spoke in San
freeway system. This segment serves the city's southwest side
and continues on
to Laredo, the busiest US-Mexico border crossing for trucks. This
corridor is also an
important component in the continuing development of Port San
downtown San Antonio, Market Square, the University of Texas at San
downtown campus, the San Antonio Produce Market, South Park Mall, Palo
College, Texas A&M University at San Antonio, the Toyota assembly plant and adjacent suppliers, and a growing logistics and
industrial area at Loop 410 as well as the cities of Von
Somerset. Commercial and industrial development fronts the
downtown. Residential and some commercial development lines
the corridor south
of US 90 to Somerset Rd. Mostly undeveloped land takes over south of
Rd. to Loop 410. South of Loop 410, light industrial areas and
two rail yards sit on the west side of
freeway between Loop 410 and Von Ormy.
for a schematic of I-35 South.
- 8 lanes from I-10 West to Laredo
St. with a short double-decked stretch (4 lanes on
the upper levels; 4 lanes on the lower level) from Guadalupe St. to S.
- 9 lanes (4 southbound, 5
northbound) from Laredo St. to US 90
- 6 lanes from US 90 to Spur
- 4 lanes from Spur
422/Poteet-Jourdanton Hwy. to Loop 1604
- No traditional
access roads along most of the route
from I-10 West to US 90, although S. Pecos-La Trinidad functions a
southbound access road from I-10 West to S Alamo St. Short sections of
access road exist on both sides between S Alamo St. and Cevallos St. A
road exists southbound from San Marcos St. to Nogalitos.
- Continuous access roads along most of remainder of
- Access roads do not continue through Loop 410
interchange or over the Medina River
for a list of I-35 South exits.
mph from I-10 West to Loop 410
- 70 mph from Loop 410 to Loop 1604
|SPECIAL FEATURES &
- Double-decked freeway from just
north of S. Alamo to just south of S. Laredo St.
- TransGuide coverage from I-10
West to Southcross Blvd.
- VIA Metropolitan Transit Madla Transit Center/Park
& Ride just north of Zarzamora St.
- Northbound left exit to Loop 353
- Two miles of I-10/US 87 concurrent
(multiplexed) from I-10 West to US 90
- US 81
was concurrent (multiplexed) over I-35 in Bexar County before it was
decommissioned south of Ft. Worth in 1991
Generally heavy from I-10 West to SW
Military Dr. Moderate to light volumes south from
there. Regular peak-period congestion can be found northbound
in the morning between Division Ave. and Cesar Chavez Blvd. and in the evening in
both directions between I-10 West and US 90.
Overall, the corridor has generally
seen traffic growth over the past decade with the biggest
increases south of Military Dr.
ANNUAL DAILY TRAFFIC
|S of Laredo St.||79,000||180,000||159,000||173,964||178,839||177,327||-1.49%|
|S of US 90||92,000||151,000||135,000||152,614||155,370||155,113||+2.72%|
|N of SW Military Dr.||59,000||107,000||77,000||113,122||117,525||115,550||+7.99%|
|N of New Laredo Hwy.||17,000||38,000||35,000||43,677||45,579||46,774||+23.09%|
|S of Fischer Rd.||21,000||40,000||42,000||54,741||56,003||57,722||+44.31%|
for photos and video of this
current projects in
MPO's 25-year plan
has proposals for the expansion of I-35 to eight lanes from US 90 to
Atascosa County line.
new expressway (Kelly Parkway) roughly
paralleling this section of I-35 is proposed as part of the Port San
long-range road improvements package. It would run north from
SH 16 near the
Toyota plant to US 90 via General Hudnell Dr., crossing I-35 between Spur
"stack" interchange at Loop 410 is included in future plans to upgrade
SW Loop 410.
authorized on October 1, 1959, and was
Expressway." It's now named
the PanAm Freeway because it
is an unofficial segment of the Pan American Highway. This freeway is
also part of the so-called "NAFTA
section from Guadalupe to Pruitt St. (near Nogalitos) was
completed in 1952. The elevated segment from
Guadalupe to present-day
I-10 West was completed by 1957. There were two proposals for
the section from
Nogalitos to Loop 410, including one that would have usurped Nogalitos
Laredo Hwy. and another that would have doglegged along SW
Military Dr. The final routing was approved by 1955 and the access
roads were opened between SW Military and New Laredo Hwy. in 1956. The
expressway between Nogalitos and Division opened in
1958. The section from SW Military south to New
Highway was upgraded to a full freeway in 1960.
section from I-10 West to US 90 was expanded in the
late '80s and early '90s. The
section from SW Military to Spur 422 was expanded from four to six
1989. TransGuide coverage was added to the section from I-10W
to Southcross in
1995. The section from US 90 to SW Military was reconstructed
ca. 2009. The
reconstruction removed several pedestrian bridges, expanded the
and frontages roads, and relocated several entrance and exit
section from Zarzamora to Somerset Rd. was reconstructed during the
frame. That project removed the previous southbound left-hand
exit to SP 422
and the northbound left-hand exit to Palo Alto Rd., extended the
frontage road through the Spur 422 interchange, and adjusted several
and ramps in the vicinity.