There will be intermittent rolling roadblocks for 15-minute intervals on Route 1, northbound and southbound, from 9 a.m. to 3 p.m. Monday, Dec. 18 through Wednesday, Dec. 20, between the Roth Bridge and the Biddles toll plaza near Port Penn, the state Department of Transportation announced.

The road blocks are necessary for overhead bridge work. Delaware State Police will be on-site to direct motorists.

Motorists should anticipate slow moving traffic throughout this vicinity.

To avoid delays, motorists may take U.S. 13 northbound and southbound between Pole Bridge Road and Route 1.