DNT Improvement Projects consist of various projects that extend along the entire 32 miles of the DNT from Interstate 35E to US 380. These improvements are designed to add capacity, help traffic flow and minimize traffic impacts during preventative maintenance.

Additional projects along the DNT between Interstate 35E in Dallas and the Sam Rayburn Tollway (SRT) in Frisco were completed in 2018. This work included adding a northbound fourth lane from the Trinity Mills Road exit ramp to the SRT and a southbound fourth lane from the SRT to Belt Line Road in Addison. Ramp improvements, resurfacing, and restriping work was also completed.

Current projects include:

•  U.S. 380 to SRT: planning is currently underway for the addition of a fourth lane in each direction
•    Harvest Hill Road to President George Bush Turnpike​

The North Texas Tollway Authority (NTTA) is proposing to widen the Dallas North Tollway (DNT) from Sam Rayburn Tollway to U.S. Highway (US) 380 in the City of Frisco, Collin County, Texas.  The NTTA has issued a Notice Affording Opportunity for Public Hearing (NAOPH) for the proposed project.

 To view the notice, click here. 

 To view notice in Spanish. 

 To view the project location map, click here​. 

 Documentation showing the project location, preliminary design and environmental studies for the project is available for viewing at the NTTA offices located at 5900 W. Plano Parkway, Suite 100, Plano, Texas 75093. To schedule an appointment, please contact Ms. Alice Murray, NTTA Project Communications Manager, at (214) 461-2000 to view project documentation.

 Requests for a public hearing must be submitted in writing and received or postmarked on or before Monday, September 28, 2020 to the NTTA Offices, P.O. Box 260729, Plano, Texas 75026, Attn: Ms. Alice Murray.​