As part of the Transform 66 Outside the Beltway Project, the I-66/I-495 Interchange has been modified with several new ramps and connections. The newly designed interchange:
Get a closer look with the Transform 66 Interactive Map.
I-495 Express Lanes Access
New Flyover Ramp from I-495 North to I-66 West
As part of the project, a new flyover ramp from northbound I-495 to westbound I-66 has been built. The new ramp is located about one-half mile south of (prior to) the old exit ramp, and prior to the ramp heading to eastbound I-66.
The new I-495 North to I-66 West ramp was completed as an interim milestone for the project in August 2022, and was the first of several new ramp openings and permanent traffic pattern changes that happened at the I-66/I-495 Interchange area. The location of the ramp from I-495 North to I-66 East did not change as part of this new configuration.
Aerial view of the I-495 Interchange. (April 2023)
Noise Wall Replacement and Addition Near the I-495 Interchange
Several sections of noise walls had to be demolished and rebuilt in the northwest, northeast, and southeast quadrants of the I-495 Interchange so that construction of new ramps could take place. Additionally, a section of older wood noise wall along I-66 East between the ramp from I-495 North and Virginia Lane has been replaced.
The project final noise analysis identified a section of new noise wall along I-66 West near the W&OD Trail and Idylwood Park which has been completed.
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:
|Segment 3C FDNA Technical Memo – Southwest Quadrant of I-66/I-495 Interchange - PDF, 11.9MB|
|Segment 3C FDNA Technical Memo – Southeast Quadrant of I-66/I-495 Interchange - PDF, 6MB|
|Segment 3C FDNA Technical Memo – Northwest Quadrant of I-66/I-495 Interchange - PDF, 6.5MB|
|Segment 3C FDNA Technical Memo – Northeast Quadrant of I-66/I-495 Interchange - PDF, 6MB|
What Neighbors Can Expect
What Drivers Can Expect
|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 opened||November 2022|
|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|
|I-495 Partial Bridge Demo Outreach Flyer - April 2021 - PDF, 21MB|
|I-495 Partial Bridge Demo Outreach Flyer - March 2022 - PDF, 7MB|