If you’re driving in Virginia this weekend, make sure you pay attention to lane and ramp closures for construction at the Dulles Toll Road and I-495 interchange.

The work is part of the I-495 Express Lanes Northern Extension, or 495 NEXT project , which is adding two-and-a-half miles of express lanes on I-495 from just past the Dulles Corridor Interchange to the George Washington Memorial Parkway near the American Legion Bridge.

Starting 10 p.m. Friday until about 5 a.m. Monday, construction will close the right lane on northbound I-495 in Virginia for approximately one-quarter mile from the merge point at Exit 18 (eastbound Dulles Toll Road/Dulles Airport Access Highway to northbound I-495, mile marker 45.4) to near the Lewinsville Road Bridge in McLean.

The Exit 18 ramp will be clos

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