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I-35 Capital Express North


The I-35 Capital Express North project proposes to add one non-tolled high-occupancy vehicle managed lane in each direction along I-35 from SH 45 North to US 290 East. Managed lanes are proposed in high-congestion areas where right of way is limited. These lanes are designed to provide a less congested route than adjacent general-purpose lanes during peak periods for qualifying vehicles. Managed lanes control access by placing restrictions on use. The project also includes additional safety and mobility improvements. Visit the I-35 Capital Express Program website for the most up-to-date information on this project.

Need & Purpose

  • Improve safety and mobility

Project Description

  • Add one non-tolled high-occupancy vehicle managed lane in each direction
  • Reconstruct intersections and bridges, increasing bridge clearances and east/west mobility
  • Reconstruct the Wells Branch Parkway intersection to a diverging diamond interchange (DDI)
  • Improve bicycle and pedestrian accommodations along I-35 frontage roads and at east/west crossings


  • Project development and construction funded by TxDOT and CAMPO
  • Construction cost: $606 million


  • Finalized schematic and environmental study: late 2021
  • Plans, Specifications and Estimates (PS&E): early 2022
  • Anticipated construction start: early 2023
  • Construction start: March 2023


Project Vicinity Map



Public Information Officer
(512) 832-7000

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

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