There will be daytime lane shifts and night lane closures between Terry and Gibbs Pond roads on Route 347 in Nesconset beginning Friday, the state Department of Transportation said.
Eastbound and westbound travel lanes will be shifted toward the center median to accommodate work on the north and south sides of the roadway, DOT said.
In addition, the current median opening at Garfield Court between Lake Avenue and Gibbs Pond Road, and the opening at the Town of Smithtown Highway Department west of Southern Boulevard will be permanently closed for the safety of motorists, the DOT said.
After the lane shifts, intermittent single-lane closures will be in effect Monday through Friday between 10 a.m. and 3 p.m., the agency said.
Work requiring more than a single lane closure in each direction will take place at night between 10 p.m. and 6 a.m. Monday through Friday nights, weather permitting, according to the DOT.
The work on the 1.2-mile stretch of road is part of a $36.2 million upgrade of Route 347 through Smithtown, Islip and Brookhaven.