I-35 Capital Express Central

I-35-Capital Express Central Map

Project Description

The I-35 Capital Express Central project is located in the central region of the Austin metropolitan area for a distance of approximately 8 miles along I-35 between US 290 East and SH 71/Ben White Boulevard, with additional flyovers at I-35 and US 290 East.

The I-35 Capital Express Central project proposes to add two non-tolled high-occupancy vehicle managed lanes in each direction along I-35 from US 290 East to SH 71/Ben White Boulevard, with additional flyovers at I-35 and US 290 East. The proposed project also includes various operational and safety enhancements, including reconstructing ramps, bridges and intersections; improving frontage roads; enhancing bicycle and pedestrian paths; and accommodating transit routes. View the fact sheet.

Project Scoping

The environmental process is a multi-year process, and scoping occurs at the beginning of the environmental study, which is where we are now. Scoping is an open process involving the public and federal, state and local agencies that helps determine a range of issues, alternatives and potential environmental impacts.

Environmental Process

Build Alternatives

TxDOT has identified three preliminary build alternatives based on known corridor constraints. The environmental process also includes a “no-build” alternative, which would include standard, routine maintenance. These proposed alternatives will be refined throughout project development. View the alternatives. Read the Range of Alternatives Draft Technical Report.


*Subject to change


Environmental study and schematic design

Late 2025:

Anticipated construction start


  • TxDOT and Capital Area Metropolitan Planning Organization
  • Estimated construction cost: $4.9 billion

Past Events

I-35 Capital Express Central Virtual Public Scoping Meeting

Date: Nov 12, 2020 to Dec 31, 2020

The purpose of the virtual public scoping meeting is to gather input on I-35 Capital Express Central Project. This meeting provides an opportunity for the public to review.

More About This Event

We Want Your Feedback

Ongoing stakeholder involvement is necessary to identify and refine proposals for the corridor. Questions and comments are welcome at any time. A second virtual public scoping meeting will be held in spring 2021 to provide information.

Contact Us

Current I-35 Construction

Stay up to date on I-35 construction projects.

View My35Construction.org