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I-35 from Stassney Lane to William Cannon Drive

This project includes reconstructing the William Cannon Drive and Stassney Lane bridges at I-35 including new U-turns in each direction as well as frontage road and ramp improvements

Project Activity

  • Lane Closure

    Northbound I-35 right lane closed from the William Cannon Drive exit (#228) to Boggy Creek Drive

    Wednesday, Oct. 27 from 9 p.m. until 5 a.m.

  • Lane Closure

    Northbound to southbound I-35 U-Turns closed nightly at William Cannon Drive and Stassney Lane

    Wednesday, Oct. 27 through Thursday, Oct. 28 from 9 p.m. until 5 a.m.

  • Lane Closure

    Westbound Stassney Lane right lane closed nightly at I-35

    Wednesday, Oct. 27 through Thursday, Oct. 28 from 9 p.m. until 5 a.m.


  • Construction cost: $78.8 million


  • Construction start: July 2016
  • Anticipated construction completion: mid-2021, weather permitting 


  • OHL, USA, Inc.

Frequently Asked Questions

Why are we doing this project?

The William Cannon project will improve mobility and safety on more than three miles of I-35 mainlanes and frontage roads. This project will also address lane merging/weaving on both north and southbound mainlanes and intersection operations at Stassney Lane and William Cannon Drive will be improved. Construction is anticipated to be completed in mid-2021.

How is this project funded?

This project’s construction cost is $79 million. Construction was funded by voter-approved Proposition 1 funds. Proposition 1, which dedicates a portion of oil and gas tax revenue to the state highway fund, was approved in November 2014 by Texas voters. The William Cannon project will not add toll lanes to I-35. Want to learn more about proposition 1? Look here: sla/transportation-funding/ proposition-faq.pdf

Will you have to close the highway or other roads?

There will be times when a full closure of the Stassney bridge and William Cannon bridge will be necessary. We will provide ample notification to all citizens prior to any full closures taking place. We work hard to schedule closures during nighttime and off-peak hours to avoid traffic impacts to drivers. Lane closures will take place anywhere from 9 p.m. to 5 a.m. You can find closure information on or on Twitter @35WilliamCannon

Will the work be loud or intrusive?

We will try to keep it as quite as possible. Nearby businesses, residents, and commuters may hear noise and see temporary lighting during nighttime construction activities. To limit what our neighbors see and hear, our contractor will limit machine idling, use ambient backup alarms in the evening, and direct light away from nearby properties. When work is unavoidably noisy, the contractor will notify nearby properties prior to starting the work.

Will access to my property be affected?

Whenever possible, we strive to avoid affecting access to neighboring properties. If access is affected by our work, property owners will be notified and our crews will work to ensure that a modified access solution is developed.

How can I get involved as a business owner?

Business owners are encouraged to join our business owners task force to talk with us about potential access impacts and solutions prior to work commencement. To join the task force please contact us here to state your interest.

How will I know when there are closures in my area?

Signs, Digital Boards, and Construction Workers. Safety during construction is our top priority. Drivers will be alerted to all construction related lane closures and detours with directional signage, smart work zone display boards, and flaggers as necessary.

Who do you coordinate with during ramp closures?

We coordinate with emergency services, mass transit, and other city agencies when ramps are required to be closed temporarily or during the duration of our project. Nearby businesses and residents are also alerted to closures and provided with detour routes.

Why isn't TxDOT expanding the mainlanes along I-35?

TxDOT’s goal is to improve safety, level of service, and speed with I-35 projects that can be implemented and constructed within the next five years. The recommended improvement option for this project consists of multiple operational improvements that contributes to improved traffic flow and efficiency while minimizing right-of-way, community and environmental impacts. This allowed TxDOT to develop projects that will be ready for construction in a shorter timeframe and is ultimatley less expensive.

Project Map

Map of I-35 from Stassney Lane to William Cannon Drive



U-turn bridge construction and I-35 mainlane widening

  • Pave inside median area
  • Construct extended entrance/exit lanes
  • Widen mainlanes and add shoulders
  • Build U-turn bridges at Stassney Lane and William Cannon Drive

William Cannon Drive bridge reconstruction

  • Demolish outdated William Cannon Drive bridge
  • Construct new William Cannon Drive bridge

Stassney Lane bridge reconstruction

  • Demolish outdated Stassney Lane bridge
  • Construct new Stassney Lane bridge
  • Final paving operations
  • Final striping 


Smart Work Zone Cameras

Southbound I-35 before Stassney Ln
Northbound I-35 before William Cannon Dr
View All Cameras

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