Monument Drive at I-66 has been modified to add full-time express lanes-only 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 consists of:
There is no access to the I-66 general-purpose lanes. Drivers can continue to access the general-purpose lanes from Route 50 and Route 286 (Fairfax County Parkway).
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 express lanes ramps at Monument Drive.
Fairfax County is managing construction of the facility, which is planned to open in late 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.
Future Monument Drive Garage (Monument Drive in foreground)
Aerial view of the Monument Drive interchange. The new Monument Drive parking garage is visible on the left side of the photo. (April 2023)
Timeline
| 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 opened | November 2022 |
| Monument Drive Parking Garage planned to open | End of 2023 |
Resources
| Monument Drive Construction Update Flyer - PDF, 516KB |
