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I-35 at SH 123

This project includes improving the SH 123 intersection and ramp reversals along I-35 between SH 80 and RM 12

Project Activity

  • Lane Closure

    There are no lane closures at this time.

Project Activity

Project activity includes improvements to the northbound and southbound I-35 frontage roads and bridges at the San Marcos River. TxDOT anticipates periodic closures of the river at I-35 to complete the work. Recreational users along the San Marcos River will be notified in advance of any closures via shore signs and can sign up for additional project updates.


  • Construction cost: $107 million funded by CAMPO and TxDOT 


  • Construction start: August 2021
  • Anticipated construction completion: late 2024, weather permitting


  • Webber, LLC

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