One of Fairfax County’s most significant transportation improvement efforts is entering its final stages as the Virginia Department of Transportation (VDOT) works toward completing the Route 29 Widening Project in late summer 2026. The current construction project focuses on a 1.5-mile section of Route 29 between Union Mill Road/Centreville Farms Drive and Buckleys Gate Drive/Summit Drive. More than 30,000 vehicles travel through this section daily, making it one of the county’s most congested corridors, particularly near the intersection of Stringfellow and Clifton roads.
The centerpiece of the project is the widening of Route 29 from four lanes to six lanes throughout the project limits. Several intersections are also being upgraded, including those at Union Mill Road, Centreville Farms Drive, Stringfellow Road, Clifton Road, Meadow Estates Drive, Hampton Forest Way, Buckleys Gate Drive, and Summit Drive.
The project also includes substantial improvements for pedestrians and cyclists. New shared-use paths are being constructed on both sides of Route 29, creating connections to existing trail networks and improving access between neighborhoods, businesses, and community destinations. The project will also provide improved connectivity to pedestrian and bicycle facilities near the Fairfax County Parkway and West Ox Road interchange.
Looking Beyond 2026
The current widening project is only one piece of Fairfax County’s broader vision for the Route 29 corridor. The Fairfax County Department of Transportation is currently conducting additional corridor studies north of the project area, including a Route 29 Study between Buckleys Gate Drive and Jermantown Road and an Active Transportation Study extending from the Capital Beltway to Falls Church. These studies are evaluating long-term solutions focused on safety, multimodal transportation, pedestrian access, transit improvements, and future mobility needs. The active transportation study is expected to be completed by the end of 2026, while recommendations from the Route 29 corridor study will help guide future updates to the county’s transportation plans.
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