Under Construction: Route 15/17/29 Warrenton Interchange, Fauquier County


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The project will replace the current at-grade intersection on Route 15/17/29 at Business Route 15/17/29 with a grade-separated interchange. The interchange design will remove the existing traffic signal on Route 15/17/29, allowing free flow of through traffic. Motorists on Route 15/17/29 will use ramps to access Business Route 15/17/29 and Route 880 (Lord Fairfax Drive), which will cross Route 15/17/29 on a new overpass with roundabouts at each end. A park and ride facility will also be constructed southeast of the interchange.

Interchange is Partially Open to Traffic

Graphic showing partial opening of Warrenton Southern Interchange. Most ramps, the bridge and the two roundabouts will open to traffic on June 23

(Click on the image above for a larger view of the interchange)

The new Warrenton Southern Interchange is partially open to traffic. Drivers are urged to follow signs and to use caution while traffic adjusts to the new pattern.

The traffic signal has been removed allowing free flow of through traffic. 

Drivers traveling in either direction on Route 15/17/29 will now access Warrenton, Lord Fairfax Community College, the landfill, nearby homes and businesses via ramps on the right instead of the old traffic pattern via turn lanes at the traffic signal. 

Temporary Detour via Meetze Road

Now that the interchange is partially open to traffic, crews have begun constructing the ramp from the roundabout on the west (Warrenton) side of the project connecting to the acceleration ramp to southbound Route 15/17/29 toward Opal.

While the ramp is under construction, motorists on the east (Lord Fairfax Community College) side of the project intending to go south on Route 15/17/29 toward Opal will be temporarily detoured via northbound Route 15/17/29 to Route 643 (Meetze Road) to southbound Route 15/17/29.

The acceleration ramp from southbound Business Route 15/17/29, coming from Warrenton, to southbound Route 15/17/29, toward Opal, is open to traffic. Motorists on the west (Warrenton) side of the project can use this ramp via the right lane to access southbound Route 15/17/29 and will not need to use the detour.

The detour will be in place for about three months.

Warrenton Interchange Map and Roundabout Driving Tips 

Click here to view a map of the Warrenton Southern Interchange. NOTE: Ramp C is not open to traffic. 

Drivers can follow these tips for navigating the roundabouts: 

  • Follow signs and pavement markings for your safety.
  • Slow down when approaching the roundabout and yield to traffic already in the roundabout.
  • As you enter the roundabout, keep right and drive in the counter-clockwise direction.
  • Do not turn left when entering a roundabout.
  • Use a turn signal and exit the roundabout with caution.

To learn more about roundabouts, visit VDOT's Innovative Intersections and Interchanges webpage or watch the video below:

Construction Camera (Time Lapse)

Check out the Warrenton Southern Interchange camera to view past and current photos or a time-lapse video of work in progress. 

Screenshot of time lapse camera near Warrenton Southern Interchange project


The purpose of this project is to replace the existing at-grade intersection of Route 15/17/29, Route 15/17/29 Business and Route 880 (Lord Fairfax Road) with a grade-separeted interchange to improve safety and capacity. Traffic conditions at this location include a high volume of northbound left turns into the town of Warrenton, a large (12 percent) volume of truck traffic, and local traffic associated with Lord Fairfax Community College, the Fauquier County landfill and homes nearby. 

Major Milestones 

Public hearing: May 9, 2017
Public comment period ends: May 19, 2017 
Design-build contract award: Feb. 22, 2018
Complete Design / Permitting: March 2018 - Winter 2018
Pre-Construction Citizen Information Meeting: November 13, 2018
Construction start: March 4, 2019
Right of Way Acquisition: Winter 2018 - Summer 2019
Utility Relocations: Spring 2019 - Winter 2019
Interchange Partially Opens: June 23, 2020 
Meetze Road Detour: June 23, 2020- Fall 2020
Full Interchange Open: Fall 2020 
Park and Ride / Construction completion: Winter 2020


Contact Info:

Will Merritt

Other relevant links:

Preliminary Noise Study Adobe Acrobat PDF(5.5 MB)

Final Noise Study Adobe Acrobat PDF(13 MB)

Previous Meetings >>

Phase: Under Construction

UPC: 77384

Lat/Long: 38.686699,-77.787387

Locality: Fauquier

Page last modified: July 6, 2020