Starting tomorrow night, Sept. 27 and continuing through Saturday night, Oct. 2, the eastbound lanes of the Dulles Toll Road (Route 267) and the Dulles International Airport Access Highway will be closed overnights just east of the Capital Beltway (I-495) overpass, forcing traffic to detour to southbound I-495, Fairfax County officials report.

Drivers using the Airport Access Highway will be directed on to the Toll Road (Route 267) via the existing slip ramp beginning nightly at 9 p.m. Then at 11 p.m., all eastbound traffic on the Toll Road (including traffic that has been detoured from the Airport Highway to the Toll Road) will be detoured to southbound I-495, to northbound Route 123 toward McLean to eastbound Route 267 toward I-66/Washington D.C. The closings are necessary because of construction of the aerial bridges that will carry the tracks for the future Dulles Corridor Metrorail Project near Route 123 and Route 267. All lanes will be reopened by 5 a.m., in time for morning rush hours.The Dulles Corridor Metrorail Project is a 23-mile extension of Metro’s existing Orange Line. The project is managed and owned by the Metropolitan Washington Airports Authority. The design-build construction contractor is Dulles Transit Partners.