About the Project

Monument Drive

Monument Drive

Monument Drive at I-66 will be modified to add full-time Express Lanes access to the east and west. In addition, a new parking garage is being built with project funding.

Express Lanes Access

66 Express Lanes access at Monument Drive will consist of:

  • Ramps to and from the eastbound 66 Express Lanes
  • Ramps to and from the westbound 66 Express Lanes

There will not be access to the I-66 general-purpose lanes. Drivers will continue to access the general-purpose lanes from Route 50 and Route 286 (Fairfax County Parkway).

Monument Drive Express Lanes Access Points

Monument Drive Ramps Open to Full-time, Two-way Traffic

The Monument Drive ramps to I-66 East and from I-66 West converted from alternating, one-way travel to full-time, two-way travel in September 2020. Drivers on Monument Drive traveling to I-66 East, and drivers on I-66 West traveling to Monument Drive are now permitted to use the ramps 24 hours a day. 


  • Full-time, two-way travel is now allowed. Two-way traffic on the ramps is separated by flexible road bollards.
  • HOV-2 restrictions remain in place during peak periods. The ramp from Monument Drive to I-66 East is restricted to HOV-2 Only weekdays between 5:30 a.m. and 9: 30 a.m. The ramp from I-66 West to Monument Drive is restricted to HOV-2 Only weekdays between 3 p.m. and 7 p.m.
  • Only buses, two-axle, and emergency vehicles are permitted to use the ramps. No trucks are allowed to use the ramps at this time.

Monument Drive Ramp Now Two-way

Right Turn from Monument Drive North to I-66 East Closed Through September 2022

The right turn from Monument Drive North to I-66 East closed on February 24, and will remain closed for approximately six months.

Drivers will be directed farther north to make a U-turn at the traffic signal at Fair Lakes Parkway to head south on Monument Drive. Drivers will then turn left at the traffic signal to the ramp to I-66 East.

Pedestrians and cyclists using the shared-use path on the east side of Monument Drive between I-66 and Government Center Parkway will be directed to follow a temporary path provided between barriers.  

Some Fairfax Connector bus routes will be modified to accommodate the closure and detour. Visit  for more information on bus routes and schedules.

Monument Drive Parking Garage

The Monument Drive Commuter Parking Garage and Transit Center will include a garage with 820 parking spaces and a transit center with eight bus bays, pick-up/drop-off area, secure bicycle storage, bicycle racks and a Connector store. It will be located at the intersection of Government Center Parkway and Monument Drive, adjacent to the future Express Lanes ramps at Monument Drive. 

Fairfax County is managing construction of the facility, which is planned to open in 2023. The project has an estimated total cost of $43 million which will be funded with $38.5 million from Transform 66 concession project funds and $4.5 million from local funds. Groundbreaking occurred in November 2021.

Monument Parking Garage Rendering
Future Monument Drive Garage (Monument Drive in foreground)

What Neighbors Can Expect

  • Construction activities for the new Express Lanes ramps on the west side of Monument Drive, and the Monument Drive Commuter Parking Garage and Transit Center began in 2021 and will ramp up in 2022.
  • Project emails and website will be used to communicate major traffic switches or nighttime work.

What Drivers Can Expect

  • Traffic shifts on I-66 and Monument Drive, temporary ramp closures, and other changes are expected to continue through Express Lanes opening in 2022. Sign up for project email updates to keep up to date
  • Drivers should slow down, stay focused, and be alert for new traffic patterns and construction crews.

Aerial view of Gallows Interchange
Aerial view of the Monument Drive. (July 20, 2022)

Express Lanes progress at Gallows Interchange
Express Lanes progress at Monument Drive. (August 12, 2022)


Anticipated Schedule Dates
Traffic shifts on I-66 near Monument Drive Ongoing
Existing Monument Drive ramps open to full-time, two-way travel September 2020
Construction of Express Lanes ramp on west side of Monument Drive begins 2021
Parking garage construction begins November 2021
Express Lanes open Late 2022


Monument Drive Construction Update Flyer - PDF, 516KB

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