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.
I-495 Express Lanes Access
New Flyover Ramp from I-495 North to I-66 West to Opened August 25
The first new exit ramp and bridge for the under-construction I-66/I-495 Interchange opened ahead of schedule Thursday morning, August 25. Drivers on northbound I-495 now exit to westbound I-66 using the new flyover ramp, located one-half mile south of (prior to) the old exit ramp, and prior to the ramp heading to eastbound I-66. The old exit ramp has been closed to allow for construction of a new ramp to connect to the future westbound 66 Express Lanes. Drivers should use caution and follow roadway signs when traveling in this area.
The new I-495 North to I-66 West ramp was completed as an interim milestone for the Transform 66 Outside the Beltway Project and is the first of several new ramp openings and permanent traffic pattern changes happening this year at the I-66/I-495 Interchange area. The location of the ramp from I-495 North to I-66 East will not change as part of this new configuration.
Construction Update (Updated September 28, 2022)
Recent Construction Progress:
Upcoming Construction Activities:
Aerial view of the I-495 Interchange. (August 12, 2022)
Aerial view of the Dunn Loring Express Lanes ramps construction progress. (August 12, 2022)
Project progress at the I-495 Interchange. (August 12, 2022)
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:
|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 open||December 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|