A section of Main Street in Yarmouth will be closed to motorists this weekend as construction crews demolish the remaining section of the old Route 1 bridge that spans the street.

The Maine Department of Transportation, which is managing the project, posted a traffic alert Wednesday on the Yarmouth Police Department’s Facebook page that said there will be no pedestrian or motor vehicle access to Main Street directly under the bridge.

The closure will become effective at 10 p.m. Friday and remain in effect through 4 a.m. Monday.

Route 1 will remain open and drivers will be able to access Route 1 from Main Street by using York and School streets.

The $4.1 million bridge replacement project will take another year to complete, but once it’s finished will feature a five-foot wide paved sidewalk on the east side of Route 1 and new 10-foot wide multi-use path on the west side. The project includes funding for new lighting, railings and illuminated crosswalks. The new bridge design also calls for an additional foot of clearance over Main Street.

All construction will be suspended during the 2018 Yarmouth Clam Festival, which is scheduled July 19-23.