Project ID (CSJ):  0017-10-261


Business developments and area growth in San Antonio along I-35 have increased traffic congestion, exceeding the highway's current capacity. The City of San Antonio passed along a $20 million dollar grant from the U.S. Department of Defense to help address the needs along one of the most congested roadways in Texas. The City's partnership with TxDOT reflects the understanding of all regional transportation partners that I-35 is vital to the Texas economy and our quality of life.

Need & Purpose
  • Need:  Increased truck traffic along the I-35 corridor coupled with regional population growth in Texas has created travel demand that exceeds its current capacity. The existing I-35 facility through Central Texas is an essential element of the local and regional transportation system.
  • Purpose: The purpose of the project is to meet local and regional travel demands by increasing capacity; upgrading the transportation infrastructure to meet current FHWA and TxDOT design standards for interstates, bridges, and frontage roads; thereby improving the safety of travelers along I-35.
  • Alignment of certain exit and entrance ramps increases congestion
End Result
This project will address congestion while improving safety at this intersction by:
  • Expanding the expressway from 6 - 8 main lanes
  • Reconfiguring specific exit and entrance ramps
  • Providing auxiliary lanes between entrance and exit ramps to allow acceleration and deceleration
  • Converting the southbound I-35 exit to southbound I-410 from a left-side exit to a right-side exit
  • Construction Cost Estimate:
    $74.4 million
  • Construction began fall 2013 and is expected to be completed late 2015

Project Vicinity Map


Josh Donat
Public Information Officer

TxDOT San Antonio District
4615 NW Loop 410
San Antonio, TX 78229-0929

(210) 615-5932