Major reconstruction of the Route 123 (Chain Bridge Road) Interchange is a part of the Transform 66 Outside the Beltway Project. The new interchange design:
Get a closer look with the Transform 66 Interactive Map.
Express Lanes Access at Route 123
Drivers will have improved connections from Route 123 North and South to the I-66 East and West general-purpose lanes.
New Ramp from Route 123 South to I-66 West Now Open
The new permanent ramp from Route 123 South to I-66 West opened during the early morning hours on April 20. The temporary left turn and connector ramp from Route 123 South to I-66 West has been closed.
Drivers should expect the following traffic change pattern:
Ramp from Route 123 South to I-66 West
New Loop Ramp from Route 123 South to I-66 East is Now Open
The new, permanent loop ramp from Route 123 South to I-66 East is open. The current left turn to the temporary connector ramp from Route 123 South to I-66 East has been closed.
Drivers should expect the following new traffic pattern:
Ramp from Route 123 South to I-66 East
Construction Update (Updated May 19, 2023)
Recent Construction Progress:
Upcoming Construction Activities:
Aerial view of the Route 123 area. (April 2023)
What Neighbors Can Expect
Timeline
Anticipated Schedule | Dates |
Clearing activities begin | Spring 2018 |
Traffic pattern shifts begin | April 2019 |
Ramp and bridge work begin | Summer 2019 |
Demolition of ramp from I-66 West to Route 123 South | January-February 2020 |
Traffic shifts to new Route 123 bridge span |
December 30, 2020
|
Demolition of old Route 123 bridge span | January-February 2021 |
Construction of second Route 123 bridge span begins | Winter 2021 |
Express Lanes opened | November 2022 |
Resources
Concept plans (I-66) - PDF, 13.7MB |
Concept plans (Route 123) - PDF, 12.6MB |
Cross sections - PDF, 16.9MB |
Plan and profile - PDF, 36.4MB |
Planned I-66 trails near Route 123 - PDF, 1.5MB |
Upcoming traffic changes (April 2019) - PDF, 424KB |
Upcoming traffic changes (July 2019) - PDF, 396KB |
Construction Update Meeting on September 4, 2019 Flyer - PDF, 1.3MB |
Route 123 (Chain Bridge Road) South Flyover Ramp Demolition - January 2020, - PDF, 5.6MB |
Traffic Pattern Changes for I-66 East to Route 123 North on February 21 - Website |
Traffic Changes at Route 123/I-66 Interchange Starting on or about March 21 - Website |
Flyer on Rose Forest Drive Closure and Detour (September 2020) - PDF, 1.7MB |
Route 123 Bridge Demolition Flyer (December 21, 2020) - PDF, 2MB |