Trinity Parkway


The proposed Trinity Parkway will connect Interstate 35E to U.S. 175, providing a new, approximately 9-mile relief route around the west and south sides of Dallas’ central business district. The Trinity Parkway would be a six-lane, tolled bypass around downtown Dallas, which would provide traffic relief for the I-30 and I-35E corridors. The NTTA is managing ongoing environmental clearance and preliminary engineering efforts to advance the project. The project may go through a market valuation process, a joint NTTA-TxDOT effort, as outlined in Senate Bill 792, passed by the 80th Texas Legislature.

A 1997 Major Investment Study identified the construction of a new roadway in the Trinity River area as one of several projects that would relieve congestion near downtown Dallas. Due to its proximity to other planned Trinity River improvements, environmental analysis continues to be comprehensive and extensive. 

Funding for the planning and environmental study tasks is provided by the City of Dallas. In a 1998 ballot initiative, voters approved $84 million for the Trinity Parkway project. Per an agreement between NTTA and the City of Dallas, this amount will fund the environmental and permitting costs, with the remaining balance used for right-of-way acquisition, utility adjustments, design and construction. Additional funding sources for construction, operations and maintenance will be identified later in the project. As various project components are finalized, it is anticipated that future funding agreements will identify the cost shares of other funding partners. 

Other agencies involved in the Trinity Parkway project include: The City of Dallas, the U.S. Army Corps of Engineers, the Texas Department of Transportation, the North Central Texas Council of Governments, the Federal Highway Administration and the United States Environmental Protection Agency.​​​​​​​​​


Public Hearing Held April 24, 2014
The North Texas Tollway Authority, in cooperation with the Texas Department of Transportation, held an open house and formal Public Hearing on Thursday, April 24, 2014, at the Kay Bailey Hutchison Convention Center Center in Dallas. The purpose of the Public Hearing was to inform the public and agencies and solicit comments on the schematic plans for the project alternatives and on the Final Environmental Impact Statement (FEIS).

Read the Public Hearing notice for complete details.

View the hearing presentation.

Important note: After the Public Notice was released, there was a change to the public comment period. Effective April 16, 2014, the Texas Administrative Code Title 43 Part 1 Chapter 2 Subchapter E, Rule 2.107 Public Hearing requires project sponsors to provide not less than 15 days for public comment following an EIS project hearing. This information is not included on the Public Notice that is linked above.

All comments must have been received or postmarked on or before Friday, May 9, 2014, to be included in the Public Hearing record. 

The project partners have prepared a public hearing summary and analysis report that has been submitted to FHWA for review. FHWA is expected to issue a Record of Decision to either agree with the recommended build alternative (3C) or chose the “no build option.” by the end of the year.

Cost Estimate

$1.3 billion (current dollars).

For more detailed information, please see the Cost Estimates section of the 2014 FEIS document

Construction Date

To be determined.

Page Updated

October 2014

Project Information

Corridor Manager: Daniel Chapman, P.E.
Public Information: (972) 628-3041