DNT Improvements

Dallas North Tollway Improvement Projects Description

DNT Improvement Projects consist of various projects that extend along the DNT from Interstate 35E north to the Sam Rayburn Tollway. The projects include:

  • Sam Rayburn Tollway to President George Bush Turnpike: the addition of a fourth lane in both directions
  • DNT/PGBT interchange: reconfigure the existing direct-connector ramps on the north side of the interchange to add another lane
  • SRT to I-635: resurfacing the roadway pavement, restriping, and the relocation of existing light poles from the center median barrier to the outside
  • PGBT to Belt Line Road: restriping to add a fourth lane on southbound DNT from PGBT to the Belt Line Road exit and restriping to extend the existing fourth lane on northbound DNT from the Trinity Mills Road exit to the PGBT exit
  • Harvest Hill Road to I-35E: replacing the center barrier, resurfacing the pavement and adding new pavement markings. For more information on these improvements, click here.

Various Closures to Begin at Northwest Highway/Lomo Alto Drive area

As part of the ongoing DNT Improvement Projects work at Northwest Highway and the DNT frontage road (Lomo Alto Drive) will start on Sunday, Aug. 12, 2018. Various closures of the northbound DNT exit to Northwest and Lomo Alto Drive (DNT frontage road) will be scheduled. Details.

Scheduled lane/ramp closures on NTTA roads are posted each weekday.

Project Maps

Below are two schematics with detailed information on the DNT Improvement Projects. The maps focus on the project limits located between the PGBT and SRT. Both maps were displayed at an open house meeting for businesses on May 22, 2014 and two community open house meetings held
June 24 and 26, 2014.

Below are schematic drawings that focus on the DNT Improvements from I-635 north to the PGBT. They were displayed at a business community open house meeting held on Oct. 8, 2014, and at two community open house meetings held Feb. 26 and March 3, 2015.

Business Information Group (B.I.G.) Meetings

Business Information Group, or B.I.G., meetings are designed to keep business owners and managers current with progress on the PGBT Widening Project and Dallas North Tollway Improvement Projects. NTTA personnel and consultants, and sometimes representatives from our partners, provide brief presentations about the projects during the sessions.

The Dallas/Addison Area B.I.G. last met in May 2017 via virtual meeting.

The DNT/PGBT Interchange Area B.I.G. met in August 2017 and this project updates report was shown. The Legacy Drive Area B.I.G. also met in August 2017 and this project updates report was presented to those in attendance.

Dates have not been set for the next B.I.G. meetings.

Individuals interested in joining the B.I.G. are asked to send a note to ProgressNTTA@NTTA.org or call 972-628-3134. 


See our quarterly Corridor Progress Report for the latest information.  Spring 2019


We have created three animations to show what the DNT will look like once the improvement projects work is completed in Fall 2018.

Two of our videos feature the DNT from just south of the President George Bush Turnpike to Belt Line Road. Both the Driver's View and Aerial View videos detail widening and upcoming changes to DNT such as, four lanes in each direction, resurfacing the roadway pavement and light poles moved from the center median to the outside of the roadway for ease of maintenance.

Get a glimpse of what the DNT Improvements from the President George Bush Turnpike to Sam Rayburn Tollway will look like after construction in completed.


Progress in Pictures
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Photo Slideshow - View photos of the DNT Project Improvement Projects construction.


Frequently Asked Questions
Click here for “Frequently Asked Questions” about the DNT Improvement Projects.



  • Construction on the DNT/PGBT interchange and on the main lanes between PGBT and SRT began on June 1, 2015.
  • Two B.I.G. meetings were held on June 23 and 24, 2015. NTTA held the second B.I.G. meetings on Sept. 29 and 30, 2015.
  • At the January 2016 Board Meeting, contractors were selected for construction and management services for the section from I-635 to PGBT. The board also authorized lowering the speed limits to 55 and 60 mph in the construction area.
  • The first B.I.G. meetings of 2016 were held on Jan. 26 and 27.
  • Construction from the DNT/PGBT interchange to I-635 began on March 28, 2016.
  • First Addison area B.I.G. meeting held on April 21, 2016.
  • B.I.G. meetings for the Legacy and Interchange areas were held May 24 and 25, 2016.
  • The Tennyson Parkway bridge was partially demolished June 11-13, 2016 in order to continue construction on the DNT main lanes.
  • A B.I.G. for the Interchange area was held on Aug. 31, 2016.
  • A B.I.G. for the Legacy area was held on Nov. 15, 2016.
  • B.I.G. meetings for the Legacy and Interchange areas were held on March 22 and 23, 2017.
  • The remaining half of the Tennyson Parkway bridge was partially demolished March 31-April 3, 2017 in order to continue construction on the DNT main lanes.
  • Construction on improvements from Harvest Hill Road to I-35E began April 9, 2017.
  • At the April 19, 2017 Board Meeting, the board authorized lowering the speed limits of 55 mph in the construction area for improvements located between Harvest Hill Road and I-35E.
  • The Legacy Area and the Addison Area B.I.G.s met on May 9 and 10, 2017.
  • On May 19, 2017, the southbound Trinity Mills Road entrance ramp temporarily closed to traffic to will rebuild the retaining wall and ramp. 
  • The Legacy and the Interchange area B.I.G.s met virtually on Aug. 9, 2017 to provide businesses an update on the DNT IP.
  • Two full closures took place over a weekend in August 2017to place beams at Tennyson Parkway and pour the concrete deck for the new Legacy Drive U-turn bridge.
  • On Aug. 28, 2017 the new southbound Windhaven Parkway exit ramp opened to traffic and the southbound Parker Road exit ramp closed to traffic. The ramp was relocated to improve mobility.
  • On Sept. 1, 2017 the southbound Trinity Mills Road entrance ramp reopened to traffic.
  • In Dec. 2017, multiple milestones were reached, including:
    • The four north- and southbound fourth lanes on the DNT from Park Blvd. to the Sam Rayburn Tollway were opened to traffic
    • The northbound entrance ramp from Parker Road was reopened to traffic
    • The southbound entrance ramp from Windhaven Parkway was reopened to traffic
    • The southbound Parker Road exit ramp was reopened to traffic
  • In February 2018, the additional lanes of the DNT/PGBT direct-connectors were opened to traffic.


Page Updated
April  2019

Project Information
Email: DNTImproves@ntta.org
Public Involvement:
(972) 628-3134

DNT Improvements Map 04.17.2017