I-35 Downtown Merge Lanes

Project ID (CSJ):  0017-10-268


The I-35 Downtown Merge Lanes project is an effort to improve safety and address congestion along the I-35 corridor near the junction with U.S. Highway 281. Local leadership has partnered with TxDOT to develop a solution that will address the growing traffic and reduce the safety risks associated with the congestion.

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.


End Result
This project will address congestion while improving safety along this corridor by:
  • Adding dedicated merging lanes to allow motorists to accelerate to appropriate highway speeds
  • Construction Cost Estimate:
    $2.07 million
  • Construction begins late 2014 and is expected to be complete in one year

Project Vicinity Map


Josh Donat
Public Information Officer

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

(210) 615-5932