The Sam Rayburn Tollway Fourth Lane Project will affect traffic traveling both directions throughout the 26-mile tollway, which extends from west of Denton Tap Road in Coppell to US 75 in McKinney. As part of the $200 million project, bridge widening will be required as a fourth lane is added throughout the corridor.

In the Frisco area, North Texas Tollway Authority crews are working to widen bridges over the Parkwood Boulevard, Preston Road, Hillcrest Road-Rasor Boulevard and Coit Road intersections.

As work progresses on foundations and columns at those intersections, U-turns and right lanes of city streets beneath the Sam Rayburn Tollway will be closed from 9 a.m.-3 p.m. during the day and 8 p.m.-5 a.m. at night throughout the timeline of the project.

Work on the project began in January 2019 and is slated to be finished before the end of 2021.

As widening work at the intersections is completed in Frisco, full closures will be required to place beams, decks and concrete for the planned fourth lanes. Those full closures will be preceded by a message board notifying local drivers and the distribution of traffic advisories and detour maps.

The project will also see the existing eastbound Parkwood Boulevard and Preston Road exit ramps replaced. However, drivers merging from the Dallas North Tollway will continue to have access to enter the new eastbound Preston Road exit ramp or the eastbound Sam Rayburn Tollway.

NTTA crews will also add auxiliary lanes at various locations throughout the corridor to improve areas for ramp merging.

Adding a fourth lane to the tollway is part of NTTA’s continuing effort to improve traveling conditions for motorists.