Ramp from 123 North to I-66 West will close; Drivers will use temporary traffic signals, new left-turn lanes to access highway

FAIRFAX, VA – A new traffic pattern will be implemented on or about April 19 at the Route 123 (Chain Bridge Road)/I-66 interchange, including closing the ramp from Route 123 North to I-66 West and installing new, temporary traffic signals to allow these drivers to access I-66 West. Changes are part of the Transform 66 Outside the Beltway project, which is reconstructing the Route 123 interchange to add direct access to the future I-66 Express Lanes as well as improve traffic flow and safety. This new, temporary traffic pattern will remain in place for approximately two years while a new bridge and ramps are constructed.

Traffic change details include:

• The loop ramp from northbound Route 123 to I-66 West will close. Drivers will access I-66 West by turning left at a temporary traffic light using two new left-turn-only lanes and new roadway to join the existing ramp from southbound Route 123 to I-66 West (see graphic below)
• Two travel lanes will continue through the interchange in each direction
• Drivers traveling south on Route 123 should remain alert for the new traffic signal

During construction, posted travel speeds along Route 123 through the interchange will be reduced to 35 mph, consistent with posted travel speeds on Route 123 north and south of the I-66 interchange.

Drivers should expect construction-related detours and additional changes to traffic patterns as work progresses at the interchange. Drivers are reminded to use caution and pay attention to lane markings and roadway signs in construction work zones.

Learn more about the project and sign up for project updates and lane closure alerts at Transform66.org.

When complete in December 2022, the reconstructed Route 123/I-66 interchange will provide direct access to and from the new Express Lanes for both eastbound and westbound travelers. A new shared-use path through the interchange will provide connection between the new I-66 corridor trail and planned trails in the City of Fairfax.