The right lane of Reston Parkway at the intersection of Sunrise Valley Drive will be closed for parts of the week.
Dulles Corridor Metrorail crews will complete drill testing related to the traffic signal.
Closures will remain in effect today (April 23) through Thursday (April 26) from 9:30 a.m. to 3:30 p.m. and on Friday (April 27) from 9:30 a.m. to noon.
Drivers should pay attention to all signage and traffic barriers, as large, slow vehicles may exit and enter the highway at various times throughout the week.
Map via Dulles Corridor Metrorail Project