The I-66/I-495 Interchange is being modified with several new ramps and connections as part of the Transform 66 Outside the Beltway Project. The new interchange design will:
Get a closer look at what’s planned through the Transform 66 Interactive Map.
Ramp from I-495 South to I-66 West Reduced to One Lane Through Mid-March 2021
The ramp from I-495 South to I-66 West will be temporarily reduced to one lane for construction of a new ramp as part of the Transform 66 Outside the Beltway Project. The lane closure will be in place through mid-March 2021. Learn more.
Noise Wall Replacement and Addition Near the I-495 Interchange
Construction of new ramps will require several sections of noise walls to be demolished and rebuilt in the northwest, northeast, and southeast quadrants of the I-495 Interchange. Additionally, a section of older wood noise wall along I-66 East between the ramp from I-495 North and Virginia Lane will be replaced toward the end of the project.
The project final noise analysis identified a section of new noise wall that will be built along I-66 West near the W&OD Trail and Idylwood Park.
Learn more about noise walls and the Transform 66 Project here. Download the final noise analysis report sections covering the I-495 Interchange area below:
Construction Progress (Updated Feb. 23)
Bridge piers for future flyover ramps continue to be constructed at the I-495 Interchange. (Feb. 11)
Looking east at bridge piers and abutments being constructed for new flyover ramps at the I-495 Interchange (Jan. 21)
Construction continues on the I-495 and I-66 interchange. (Feb. 17)
What Neighbors Can Expect
What Drivers Can Expect
Temporary Realignment of W&OD Trail at Idylwood Park Starting On or About January 14
The Washington & Old Dominion Trail (W&OD Trail) near Idylwood Park (between Virginia Lane and the trail bridge over I-495) in Falls Church will be realigned slightly to the south of the current trail for approximately five months beginning on or about Thursday, January 14, through June 2021.
The trail is being shifted temporarily while crews construct the new, permanent trail alignment to accommodate new ramps as part of the Transform 66 Outside the Beltway Project. Crews will also construct a retaining wall to support the widening of the ramp from I-66 West to I-495 South during this period.
The W&OD Trail adjacent to Idlywood Park in Falls Church will be temporarily realigned for approximately five months beginning around January 14. The temporary trail will be located just slightly south of the current trail alignment adjacent to I-66 West.
Typical cross section of the temporary realignment of the W&OD Trail at Idylwood Park. The trail will be shifted slightly to the south of the current alignment.
Timeline
| Anticipated Schedule | Dates |
| Ramp and bridge work begins | 2018 |
| Various traffic shifts and temporary ramp closures for construction and demolition | 2018 through 2022 |
| Bridge beam installation | Summer 2020 through 2022 |
| Demolition of old bridges | 2021 |
| Express lanes open | December 2022 |
Resources
| Temporary Lane Closures on Ramp from I-495 South to I-66 West Starting on or about Thursday, January 28, through Mid-March 2021 - Website |
