Preston — A 14-month project to replace two bridges on Route 2A — one over Poquetanuck Cove and one over Halsey Brook — has begun, and signaled lane closures are expected to be in place through November, the state Department of Transportation has announced.

The $3.98 million project is scheduled to be completed by May 2021 and will be done by New England Infrastructure Inc.

The work consists of complete removal and replacement of bridge superstructures with prestressed concrete deck slabs. The substructure abutments will receive extensive repairs. The bridge over Halsey Brook will be raised approximately 21 inches. The work also involves major utility coordination, including maintaining bridge-mounted electrical utilities and maintaining and then relocating a 12-inch natural gas main. Temporary utility relocation work has begun.

Temporary traffic impacts, including daily shoulder and/or lane closures, are expected.

Lane closures along Route 2A at the bridge locations will take place between now and Nov. 30, with signalized, alternating one-way traffic configurations.