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I-35 at Williams Drive


The proposed project includes reconstructing the I-35 and Williams Drive interchange, adding operational improvements from North Austin Avenue to Rivery Boulevard, and extending the northbound frontage road from Williams Drive to the Lakeway Drive exit ramp.

Need & Purpose

  • Improve safety and mobility

Project Description

  • Reconstruct the Williams Drive interchange to a diverging diamond interchange (DDI)
  • Construct north and southbound intersection bypass lanes under Williams Drive bridge
  • Extend the northbound I-35 frontage road from Williams Drive to the Lakeway Drive exit ramp
  • Improve the existing southbound I-35 frontage road
  • Improve the Austin Avenue intersection at Williams Drive
  • Improve bicycle and pedestrian paths along the I-35 frontage roads


  • Project development funded by TxDOT
  • Construction funded by Capital Area Metropolitan Planning Organization and TxDOT
  • Construction cost: $61.7 million


  • Finalized schematic and environmental documentation: early 2019
  • Begin Plans, Specifications and Estimates (PS&E): mid-2017
  • Complete PS&E: May 2020
  • Construction letting: July 2020
  • Construction start: October 2020
  • • Anticipated construction completion: late 2023

Project Activity


Project Vicinity Map

Williams Drive map


Public Information Officer
(512) 832-7000

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

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