TxDOT breaks ground on Spur 399
MCKINNEY – The Texas Department of Transportation (TxDOT) broke ground this month on the highly anticipated Spur 399 project in Collin County.
The event, held June 17, featured Texas Transportation Commissioner Robert Vaughn, Executive Director Marc Williams Collin County Commissioner Duncan Webb and other partners touting the importance of the major congestion relief project.
The Spur 399 corridor is one of the most congested roadways in Texas. The $182 million Texas Clear Lanes project will widen the corridor from four to six lanes between US 75 and Stewart Road in McKinney. The final configuration will include frontage roads and grade-separated intersections. The project was awarded to Webber, LLC and construction is anticipated to be completed in early 2029.
The breakout project is the first project in the planned Spur 399 extension, which will eventually create an alternate route that will connect US 75 to US 380 near Princeton. This will play a crucial role in alleviating the projected traffic growth in the region, as Collin County is home to four of the 12 fastest-growing cities in the nation.
“Today, we take a huge step toward improving mobility and easing congestion in Collin County,” said Williams. "The Spur 399 project is a vital piece of the economic livelihood of McKinney, Collin County and our state. It is our priority to bring major improvement and expansion along Spur 399.”
The new route will enhance traffic flow and mobility, connecting central to eastern Collin County. By providing a new route for commuters, the project will also help accommodate local travel for residents, bicycles and pedestrians along State Highway 5 and U.S. 380 through downtown McKinney.
“Collin County is growing rapidly, and TxDOT is committed to addressing the resulting highway congestion with this project,” said Commissioner Vaughn. “But this is just the beginning. Over the coming years, TxDOT will invest $8 billion into projects along Spur 399 and US 380 in Collin County.”
The US 380 corridor is a priority for the state. US 380 continues to place prominently in the Texas A&M Transportation Institute’s list of Texas’ Top 100 Most Congested Highways. The department’s Texas Clear Lanes initiative identifies congested corridors such as Spur 399 and US 380 for projects to relieve congestion in major metropolitan areas.
The Spur 399 breakout project is the first to improve the corridor, with other projects planned to begin in the next few years. When completed, Spur 399 will be one of the few limited-access corridors on the northeast side of Collin County.
“The Spur 399 extension is part of a bigger picture for US 380 corridor improvements throughout North Texas,” said Webb. “Make no mistake, these improvements are solely needed for such a dynamic part of the region.”