The National Park Service plans to temporarily close lanes on the southbound side of the George Washington Parkway between today’s rush hours, and traffic congestion is likely.

The lane closings are scheduled for 10 a.m. to 2:30 p.m. between Spout Run Parkway and the Roosevelt Bridge in the Rosslyn area. Watch for variable message boards in that area notifying drivers about the closures.

A little farther south, the lengthy reconstruction project continues at the parkway’s Humpback Bridge. Crews are working on the barrier wall for the Mount Vernon Trail on the east side of the bridge deck and on removing asphalt and debris from the bridge approach. The project is scheduled to be done in late spring, the park service says.