I-35 Capital Express South Project

Project overview

The project will add two high-occupancy-vehicle (HOV) managed lanes in each direction along I-35 between SH 71/Ben White Boulevard and SH 45 Southeast. In addition, the project will include a southbound I-35 bypass lane that will allow traffic to bypass Stassney Lane and William Cannon Drive. Entrance and exit ramps will also be reconstructed and relocated. Pedestrian and bicycle paths will also be added.

Major impacts/activity

Southbound I-35 mainlanes between SH 71/Ben White Boulevard and Stassney Lane, closed nightly on Friday, Sept. 26, from 9 p.m. to 9 a.m., and Saturday, Sept. 27, from 9 p.m. to 10 a.m., for placement of steel beams, weather permitting.

• From eastbound SH 71/Ben White Boulevard: Drivers will take the Congress Avenue exit ramp, continue to the I-35 frontage road and turn right.
• From westbound SH 71/Ben White Boulevard: Drivers will take the northbound I-35 exit, then exit Oltorf Street and use the U-turn to access southbound I-35.

Latest update

• Sept. 25, 2025

Schedule

• Construction start: November 2022
• Anticipated construction completion: Late 2028, weather permitting

Milestones

• Construct elevated lanes from SH 71/Ben White Boulevard to Slaughter Lane
• Construct at-grade managed lanes from Boggy Creek Drive to SH 45 Southeast
• Reconstruct I-35 bridge over South Boggy Creek
• Reconstruct I-35 bridge over Onion Creek
• Widen the I-35 bridge over Slaughter Creek
• Reconstruct I-35 entrance and exit ramps
• Construct shared-use paths along frontage roads
• Perform final paving and striping to finalize project

Funding

• Construction cost: $548 million funded by CAMPO and TxDOT

Contractor

• Fluor Corporation

Project area

Downloads

• Construction Information
• Construction Information (Espanol)
• Final Environmental Assessment
• Finding of No Significant Impact
• Schematics