About the Project

Route 50 Interchange

Route 50 Interchange

The Route 50 Interchange is being rebuilt and improved as part of the Transform 66 Outside the Beltway Project. The new interchange design will:

  • Add Express Lanes access to and from the east
  • Construct new Route 50 bridges over I-66 to improve traffic flow and create room for future mass transit
  • Add noise wall along the ramp from I-66 West to Route 50 West
  • Build a shared-use path through the interchange connecting Random Hills Park and Fairfax Corner with Fairfax Farms Road and points to the east

Get a closer look at what’s planned through the Transform 66 Interactive Map.

Route 50 Express Lanes Access

  • A ramp from eastbound Route 50 to the eastbound 66 Express Lanes.
  • A ramp from the westbound 66 Express Lanes to westbound Route 50.

Drivers will continue to have full access between Route 50 and the I-66 general-purpose lanes to and from the east and west.

Route 50 66 Express Lanes AccessRamp from eastbound Route 50 to the eastbound 66 Express Lanes

66 Express Lanes access to US-50W
Ramp from the westbound 66 Express Lanes to westbound Route 50

I-66 West Travel Lanes Between Route 50 and Route 286 (Fairfax County Parkway) Shifted to New Roadway Configuration

The travel lanes on I-66 West between Route 50 and Route 286 (Fairfax County Parkway) shifted into a new configuration during the early morning hours Sunday, September 25. These temporary lane configurations are necessary as construction activities advance building the future 66 Express Lanes in the center portion of the roadway.

The westbound lanes are divided with the two right travel lanes separated from the two left travel lanes by a barrier-enclosed construction zone from just east of the Route 50 West overpass to just west of the Route 50 East overpass. Through-traffic, including traffic exiting to Monument Drive, can use either side of the lane split. This traffic pattern will remain in place for approximately two months.

66W lane split at US-50

All work is weather dependent and will be rescheduled to the following night if inclement conditions occur.

Drivers should always use caution and pay attention to lane markings and roadway signs in construction zones. 

New Route 50 Bridges Open

Route 50 has been shifted to new bridges carrying eastbound and westbound traffic over I-66. Work continues with upcoming operations to straighten Route 50 East approaching the bridge, and add ramps from Route 50 East to the eastbound Express Lanes and from the westbound Express Lanes to Route 50 West.

A shared-use path that will run between the northeast quadrant of the interchange (near Fairfax Farms Road) and the southwest quadrant (near Random Hills Park) using four short tunnels and sidewalk is also being constructed along Route 50 East.

New Combined Exit from I-66 East to Route 50 East and West Open

Drivers exiting I-66 East to Route 50 West began using a new combined exit approximately one mile prior to (west of) Route 50 the morning of August 30. The new exit location is immediately before the Monument Drive Bridge over I-66 and provides access to Route 50 East and West. This will be the permanent location of Exit 57 A/B.

Construction Update (Updated November 18, 2022)

Recent Construction Progress:

  • New Route 50 West bridge opened June 27, 2021
  • New Route 50 East bridge opened July 17, 2021
  • Temporary ramp from Route 50 West to I-66 West opened
  • Box culverts built for future shared-use path through interchange
  • Demolition of the old Route 50 West bridge was completed in July 2021 
  • Demolition of the old Route 50 East bridge was completed in August 2021

Upcoming Construction Activities:

  • Shift I-66 travel lanes to allow room for construction of Express Lanes and ramps
  • Construction of replacement and new noise walls
  • Construction of shared-use path through interchange
  • Express Lanes open late 2022

Express Lanes ramps progress at Route 50 interchange.

Express Lanes ramps progress at Route 50 interchange. (August 12, 2022)

Aerial view of the Route 50 area

Aerial view of the Route 50 area. (October 20, 2022)

What Neighbors Can Expect

  • Noisy construction activities such as bridge demolition and pile driving will be avoided at night, when possible. Noise to expect at night includes back-up alarms on equipment and trucks, which is necessary to protect worker safety
  • Lighting of the construction work area will be directed to minimize light pollution for nearby residents
  • Project emails and website will be used to communicate major traffic switches or nighttime work

What Drivers Can Expect

Random Hills Park

Utility relocation near the Route 50 Interchange will require a 0.01-acre permanent utility easement on Random Hills Park. As required by federal regulation, VDOT is accepting public comment regarding the Fairfax County Park Authority’s preliminary concurrence with the Federal Highway Administration’s Section 4(f) applicability criteria for de minimis impact for this easement.

View the public notice and additional information using these links.


Anticipated Schedule Dates
Ramp and bridge work begins
Fall 2019
Various traffic shifts and temporary ramp closures for construction and demolition
2019 through 2022
New Route 50 bridges open to traffic
Late June/July 2021
Demolition of old bridges
Summer 2021
Express Lanes open December 2022


Random Hills Park – Public Notice - PDF, 516KB
Random Hills Park - Preliminary Concurrence for de minimis Impact - PDF, 1.2MB
Random Hills Park Utility Relocation Alternatives Assessment - PDF, 1.7MB
Exhibit 1 - Random Hills Park Utility Reloc Exhibit 1 - PDF, 1.4MB
Route 50 Demolition Postcard - PDF 3.2MB

Take the No Love for Litter Pledge