Take the No Love for Litter Pledge

Overnight Full Closure of I-66 East and West at Route 123, May 7-8, for Bridge Beam Installation. Learn more.

About the Project

Route 123 Interchange

Major reconstruction is planned for the Route 123 (Chain Bridge Road) Interchange as part of the Transform 66 Outside the Beltway Project. The new interchange design:

  • Provides access to and from the future Express Lanes from I-66 East and West
  • Improves safety at the interchange
  • Connects the City of Fairfax and the planned George Snyder Trail with the new shared-use path and neighborhoods in Oakton with a grade-separated trail through the Route 123 Interchange

Get a closer look at what’s planned through the Transform 66 Interactive Map.

Overnight Full Closure of I-66 East and West at Route 123 (Chain Bridge Road) Planned May 7-8 for Bridge Beam Installation

All lanes of I-66 East and West approaching Route 123 (Chain Bridge Road) are scheduled to be closed during the overnight hours May 7-8 to allow for installation of bridge beams for the new Route 123 South Bridge over I-66 as part of the Transform 66 Outside the Beltway Project. I-66 traffic will be detoured around the closure using the ramps at the Route 123 Interchange. Route 123 will remain open during these operations, but drivers should expect possible delays crossing over I-66. Police will be on scene to direct traffic.

Drivers traveling on I-66 during this time should expect delays and should consider using alternate routes. 

Friday, May 7, and Saturday, May 8: 
I-66 East and West at Route 123 (Chain Bridge Road) 

  • I-66 East and West travel lanes will be closed at Route 123 from 11 p.m. to 6 a.m. each night.
  • All eastbound I-66 drivers will be directed to exit the interstate at Route 123. At the traffic signal, follow police direction to continue across Route 123 to the ramp back to I-66 East. 
  • All westbound I-66 drivers will be directed to exit the interstate at Route 123. At the traffic signal, follow police direction to continue across Route 123 to the ramp back to I-66 West.   
  • Route 123 North and South will remain open with police direction.
  • All lanes will reopen by 6 a.m. 

Route 123 (Chain Bridge Road) Traffic Shifted to New Bridge Over I-66

Route 123 (Chain Bridge Road) northbound and southbound traffic has shifted to the new Route 123 North bridge over I-66. The old Route 123 North and South bridges are being demolished to allow for construction of a new Route 123 South bridge, shared-use path, and new ramps to I-66 general purpose and Express Lanes.

Access to and from I-66 at Route 123 will remain in its current configuration during this phase of construction.

As construction continues through 2022 on the Route 123 and I-66 interchange, drivers should be alert for changing traffic patterns. Drivers are reminded to slow down and pay attention to lane markings and roadway signs at all times. 

The travel lanes of southbound Route 123 over I-66 shifted on to the new Route 123 Bridge on Jan. 21. Access to/from I-66 East and West will remain the same. 

Construction Update (Updated May 6, 2021)

Recent Construction Progress:

  • Route 123 traffic over I-66 has shifted to the new Route 123 North bridge (Northbound shifted on Dec. 30, 2020; Southbound shifted on Jan. 21)
  • Demolition of the old Route 123 bridges over I-66 is complete 

Upcoming Construction Activities:

  • Bridge beam installation over I-66 for the new Route 123 South bridge began May 5
  • Construction of abutments, piers, deck and approaches for the new Route 123 South bridge
  • Shifting of I-66 travel lanes to allow construction of Express Lanes ramps
  • Overnight demolition of the remaining bridge piers along I-66
  • Shift Route 123 South traffic to new bridge
  • Open Express Lanes and new ramps


Piers and abutments have been built for the new Route 123 South bridge over I-66. Beam installation is anticipated to occur in May. Pavement continues to be placed along the I-66 East and West to allow traffic to be shifted to the outside later in 2021. (April 20)

What Neighbors Can Expect

  • Noisy construction activities such as bridge demolition and pile driving will be avoided at night, when possible. Noise to expect at night includes back-up alarms on equipment and trucks, which is necessary to protect worker safety.
  • Lighting of the construction work area will be directed to minimize light pollution for nearby residents.
  • Project emails and website will be used to communicate major traffic switches or nighttime work.

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 open December 2022

Resources

Concept plans (I-66) - PDF, 13.7MB
Concept plans (Rt. 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 - Jan, 2020, - PDF, 5.6MB
Traffic Pattern Changes for I-66 East to Route 123 North on Feb. 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 (Sept. 2020) - PDF, 1.7MB
Route 123 Bridge Demolition Flyer (12/21/20) - PDF, 2MB