Update, 11:30 a.m.: Joan Morris, spokeswoman for the Virginia Department of Transportation, reports that the tree-trimming work on Chain Bridge Road is wrapping up early and should be ending about now.

Update, 11:01 a.m.: The District Department of Transportation says it has learned that the closing is not on the bridge. The Virginia Department of Transportation is doing tree maintenance work that closes down the 400 block of Chain Bridge Road, near the Virginia side of the bridge, until 2:30 p.m.

Original post: The District Department of Transportation is advising motorists that the Virginia Department of Transportation is closing Chain Bridge until 2:30 p.m. today for tree removal work.

There was some confusion about this. It’s the District that has control over the Potomac River bridge, but VDOT is responsible for roads on its side of the river.

John Lisle, spokesman for the District department, said this morning that VDOT is putting two cranes on the bridge to remove overgrown trees. VDOT personnel will be at Route 123 and Glebe Road, and at Route 123 and George Washington Parkway to detour traffic.

Motorists will need to use alternate routes and river crossings, including the American Legion, Key, Roosevelt, Memorial and 14th Street bridges, Lisle said.

This post has been updated since it was first published.