The northbound slow lane is closed on Interstate 5 over the Medford viaduct this morning while workers wait for a sealant to cure.

Crews have been applying the sealant to the road, and it must cure before drivers can use the lane, said Gary Leaming, a spokesman for the Oregon Department of Transportation. He said he did not know when the lane would reopen.

ODOT workers will be in the area all week, mostly at night.

— Staff reports