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San Antonio
Freeway system
  Fwy system history
  2022 traffic statistics
  The freeways
    I-10 East
    I-10 West
    I-35 North
    I-35 South
    Kelly Pkwy
    Loop 410 (I-410)
    Loop 1604
    SH 151
    Spur 371
    US 90 West
    US 281 North
    Wurzbach Pkwy
  Construction projects
    I-10E Exp (Graytown)
    I-10E/Loop 410
    I-10 Boerne area
    I-35 Comal Projects
    I-35 NEX
    Loop 410/SH 151
    Loop 410/US 281
    LP 1604N Expansion
    LP 1604/Blanco
    LP 1604/FM 78-I-10
    LP 1604/I-35-FM 78
    SH 151 Expansion
    US 90W Expansion
    US 90/Loop 410
    US 281N Expansion
    US 281 Comal Exp
    US 281/Basse
    US 281/Jones-Mltsbrg
    Wurzbach/NW Military
    10/1604 yield signs
    Intchg flyover heights
    History of 281/410
    HOV lanes
    Media galleries
    Tollway system
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The San Antonio Area Freeway System

This page last updated July 23, 2023
San Antonio skyline w/freeway in foreground
(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 2017, there were 1,004 centerline miles and 3,384 lane miles of state-maintained roadways in Bexar County. In 2018, the San Antonio urbanized area had 258 centerline miles and 1,435 lane miles of freeway; this ranked 22nd nationwide for both categories, but ranked 16th for lane miles per capita and for percentage of local roads (3.2%) that are freeways. Just over 50% of all local traffic is carried on the freeway system, which ranks seventh 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. (For the boundaries of what is covered, see the primer page.) Below, you'll find links to general information about the local freeways, their history, and pages with in-depth details about each freeway. There are also details of the major freeway construction projects, and information about TransGuide and other ancillary aspects of the local freeway system.


General information

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.
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 description of the route and the length covered, lane and access road configuration, a description of the general traffic conditions and traffic counts, a complete list of exits in each direction, speed limits, special features, current construction, future plans, and as much history as I know about the route.

I-10 WestI-35 NorthI-35 SouthI-10 EastI-37I-37US 90 WestSH 151US 281 NorthSP 371Kelly ParkwayKelly ParkwayWurzbach ParkwayLoop 1604Loop 1604Loop 410Loop 410Loop 410Loop 410Loop 410Loop 410Loop 1604Loop 1604Loop 1604Wurzbach ParkwayUS 90Loop 410US 281

Click on a freeway segment on the map above or on one of the links below

Construction projects


Other sites of interest

TxDOT- San Antonio District
Alamo Area Metropolitan Planning Organization
Alamo Regional Mobility Authority
VIA Metropolitan Transit
City of San Antonio Department of Transportation and Capital Improvements
San Antonio Mobility Coalition
TexasFreeway.com (by Ron Jackson)
Houston Freeways
Dallas-Ft. Worth Freeways

This page and all its contents are Copyright 2023 by Brian Purcell

The information provided on this website is provided on an "as-is" basis without warranties of any kind either express or implied.  The author and his agents make no warranties or representations of any kind concerning any information contained in this website.  This website is provided only as general information.  The author expressly disclaims all liability with respect to actions taken or not taken based upon the information contained herein or with respect to any errors or omissions in such information.  All opinions expressed are strictly those of the author.  This site is not affiliated in any way with any official agency.