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The San Antonio Area Freeway System

This page last updated January 18, 2024

US 281 and San Antonio skylinee

(Photo by Brian Purcell)

Since the first expressway opened in 1949, the San Antonio metropolitan area has enjoyed one of most progressive and comprehensive urban freeway systems in North America. For many of those early years, San Antonio was second only to Los Angeles in the number of freeway miles. While most US cities now have extensive freeway systems, Bexar County still has one of the largest systems of state highways and freeways in the nation.

In 2021, there were 1,030 miles of state-maintained roadways in Bexar County. In 2020, the San Antonio urbanized area had 253 miles of freeway, which ranked 23rd nationwide. But the city ranked 17th for freeway lane miles per capita. Just under 50% of all local traffic is carried on the freeway system, which ranks 11th nationally. A study by the Surface Transportation Policy Project in 1998 ranked San Antonio's highways as the best among the largest US urban areas.

This site covers the San Antonio freeway system in depth. Below, you'll find links to general information about the local freeways as well as pages for each freeway discussing the various characteristics of the route along with a detailed history. There is also information about the major freeway construction projects, TransGuide, and other interesting ancillary aspects of the local freeway system.



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General information

Information icon Primer
Includes lots of basic information about the freeway system including layout, statistics, double-decked freeways construction, cancelled routes, and signage, as well as the conventions used on this site.
Question mark sign FAQs
Answers to some of the most common questions I hear about San Antonio's freeways and other local roads.
Freeway system history
A history of the evolution of the San Antonio freeway system.
2022 traffic statistics
Freeway traffic counts and general statistics.

The freeways

Below, you can access detailed information about each freeway including a general description, lane and access road configurations, a description of the general traffic conditions and traffic counts, a list of exits, speed limits, special features, current construction, future plans, and a detailed history of the route.

I-10 West I-35 North I-35 South I-10 East I-37 I-37 US 90 West SH 151 US 281 North SP 371 Kelly Parkway Kelly Parkway Wurzbach Parkway Loop 1604 Loop 1604 Loop 410 Loop 410 Loop 410 Loop 410 Loop 410 Loop 410 Loop 1604 Loop 1604 Loop 1604 Wurzbach Parkway US 90 Loop 410US 281

Click on a freeway segment on the map above or on one of the links below to go to the page for that freeway


I-10
WEST
 Main page
 Exit list
 Projects
I-10
EAST
 Main page
 Exit list
 Projects
I-35
SOUTH
 Main page
 Exit list
I-35
NORTH
 Main page
 Exit list
 Projects
I-410  Main page
 Exit list
 Projects
I-37  Main page
 Exit list
US 90
WEST
 Main page
 Exit list
 Projects
US 281
NORTH
 Main page
 Exit list
 Projects
SH 151  Main page
 Exit list
 Projects
Loop 1604
NORTH
 Main page
 Exit list
 Projects
Spur 371  Main page
Wurzbach Pkwy  Main page
Kelly Pkwy  Main page

Construction projects



Etcetera

TransGuide logo HOV diamond Toll sign Media
TransGuide HOV lanes Tollway system plans Media galleries
       

Interchange height 281/410 interchange Yield sign
Interchange flyover heights History of the US 281/Loop 410 interchange Why are the I-10/Loop 1604 yield signs reversed?
     

Other sites of interest

TxDOT- San Antonio District
https://www.txdot.gov/about/districts/san-antonio-district.html
TxDOT - TransGuide
https://its.txdot.gov/its/District/SAT
Alamo Area Metropolitan Planning Organization
https://www.alamoareampo.org/
Alamo Regional Mobility Authority
https://www.bexar.org/339/Alamo-Regional-Mobility-Authority
VIA Metropolitan Transit
https://www.viainfo.net/
City of San Antonio - Public Works Department
https://www.sanantonio.gov/PublicWorks
San Antonio Mobility Coalition
https://samcoinc.org/

OTHER TEXAS "ROADGEEK" SITES
TexasFreeway.com (by Ron Jackson)
https://www.texasfreeway.com/
Houston Freeways
http://www.houstonfreeways.com/
Dallas-Ft. Worth Freeways
http://www.dfwfreeways.com/