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I-35 at SH 29


The proposed project includes mainlane and frontage road improvements, intersection bypass lanes, replacing and widening the SH 29 bridge and improve bicycle and pedestrian accommodations.

Need & Purpose

  • Improve safety and mobility

Project Description

  • Construct a single-point urban interchange (SPUI) at I-35 and SH 29
  • Construct SH 29 intersection bypass lanes
  • Reconstruct entrance and exit ramps throughout the corridor
  • Extend entrance/exit lanes along the I-35 mainlanes between entrance and exit ramps
  • Improve bicycle and pedestrian paths


  • Traditional development by TxDOT
  • Construction cost estimate: $93.1 million


  • Finalized schematic and environmental documentation: anticipated early 2022
  • Begin Plans, Specifications and Estimates (PS&E): anticipated early 2022
  • Complete PS&E: anticipated mid-2023
  • Construction letting: anticipated mid-2024
  • Construction start: late 2025
  • Construction completion: late 2027


Project Vicinity Map

SH 29 map


Public Information Officer
(512) 832-7000

TxDOT Austin District
P.O. Box 15426
Austin, TX 78761-5426

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