Several construction projects will close major roads in Nassau and Suffolk counties, starting Monday.

The state Department of Transportation said the closings are probable and subject to weather conditions and last-minute construction requirements.

The closings listed below are scheduled Monday through Friday, unless otherwise noted. Round-the-clock closings include weekends and holidays.

No road closings are scheduled after noon Friday because of the Memorial Day holiday.

For more information, motorists can call 511 or visit 511NY.org. In addition, travel information is at informny.com or on hand-held devices at informny.mobi.

LONG ISLAND EXPRESSWAY

**One lane in either direction may be closed in Brookhaven between exits 67 and 70, 10 a.m.-3 p.m.

**One lane in either direction may be closed in Riverhead at Route 25 (including shoulders), 7 a.m.-3 p.m.

**One eastbound lane may be closed in Manorville at Halsey Manor Road, 8 a.m.-3 p.m.

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**One lane either direction may be closed in Riverhead between exits 71 and 73, 10 a.m.-3 p.m.

**All westbound lanes may be closed in North Hempstead between Exit 46 and Exit 43, 10 p.m.-5 a.m.

**All lanes may be closed in either direction between exits 37 and 39, 10 p.m.-5 a.m.

LIE/SERVICE ROAD

@Newsday

**One lane in either direction may be closed in Mineola between exits 39 and 41, 10 p.m.-5 a.m.

**One westbound lane may be closed in Holbrook between Smith Avenue and Laurel Street, 7 a.m.-3 p.m.

ROBERT MOSES CAUSEWAY

**One lane in either direction may be closed in West Islip between Robert Moses State Parkway and Ocean Parkway, 7 a.m.-3 p.m.

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HECKSCHER STATE PARKWAY

/Round the Clock

**One southbound lane may be closed in East Islip, north of the bridge over Route 27 before Exit 44W, and south of bridge, after 44E.

**Two northbound lanes may be closed in East Islip, south of bridge from Exit 45W and north of bridge after Exit 44W.

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SOUTHERN STATE PARKWAY

**One lane in either direction may be closed in Hempstead between exits 27 and 13, 7 a.m.-3:30 p.m.

**Peninsula Boulevard entrance ramp may be closed in either direction, 7 a.m.-3 p.m. and 9 p.m.-5 a.m.

**One westbound lane may be closed in Bayshore between exits 39 and 38, 10 a.m.-3 p.m.

**One westbound lane may be closed in Hempstead between exits 19 and 24, 10 p.m.-5 a.m.

**One eastbound lane may be closed in Hempstead between exits 20 and 21, 10 p.m.-5 a.m.

**Two westbound lanes may be closed in Malverne between Cornwell Avenue and 250 feet west of Corona Avenue, 10 p.m.-5 a.m.

ROUTE 24

**Two westbound lanes may be closed in Hempstead between Wantagh Avenue and Meadowbrook State Parkway, 10 p.m.-6 a.m.

**One eastbound lane may be closed in East Meadow between Merrick Road and West Gate Street, 10 a.m.-3 p.m.

ROUTE 25

**One westbound lane may be closed in Southold between Tuckers Lane and Orient Ferry, 7 a.m.-3 p.m.

**One lane either direction may be closed in North Hempstead between New York City line and Route 495, 8 a.m.-4:30 p.m.

ROUTE 25A

**One eastbound lane may be closed in Huntington at Lawrence Hill Road, 10 a.m.-3 p.m.

**One lane either direction may be closed in North Hempstead between the New York City line and Route 108, 8 a.m.-4:30 p.m.

**One eastbound lane may be closed in Huntington between Randou Drive and Greenlawn Road, 10 a.m.-3 p.m.

ROUTE 27

**All lanes either direction may be closed in Bayshore between Merge and Brentwood Road, 11 p.m.-5 a.m.

**One lane either direction may be closed in Merrick between Merrick Avenue and southbound Meadowbrook State Parkway, 7 a.m.-3 p.m.

**One westbound lane may be closed in Southampton between Route 24 and County Road 31, 9 a.m.-3 p.m.

**One westbound lane may be closed in Brookhaven between Speonk and County Road 21, 9 a.m.-3 p.m.

**One westbound lane may be closed in Brookhaven between Station Road and Hospital Road, 9 a.m.-3 p.m.

**One westbound lane may be closed in Brookhaven between Hospital Road and North Ocean Avenue, 9 a.m.-3 p.m.

**One lane either direction may be closed in Hampton Bays between Exits 66 and 65, 10 a.m.-3 p.m.

**One lane either direction may be closed in North Hempstead between the New York City line and Route 109, 8 a.m.-4:30 p.m.

ROUTE 27/SERVICE ROAD

**One eastbound lane may be closed in East Islip between Carlton Avenue and Heckscher State Parkway ramp, 9 a.m.-3 p.m.

**One westbound lane may be closed in East Islip between Connetquot Avenue and Heckscher State Parkway ramp, 9 a.m. to 3 p.m.

ROUTE 110

**One westbound lane may be closed in Amityville at Albany Avenue, 10 a.m.-3 p.m.

**One eastbound lane may be closed in Huntington at Route 25, 10 a.m.-3 p.m.

**One westbound lane may be closed in Huntington at Pulaski Road, 10 a.m.-3 p.m.

ROUTE 112

**One northbound lane may be closed in Port Jefferson Station between Route 347 and Reo Drive, 10 a.m.-3 p.m.

**One southbound lane may be closed in Port Jefferson Station between Route 347 and Roosevelt Avenue, 10 a.m.-3 p.m.

ROUTE 231

**One lane in either direction may be closed in Dix Hills between Deforest Road and East Deer Park Road, 10 a.m.-3 p.m.

ROUTE 347

**Two westbound lanes may be closed in Smithtown between Southern Boulevard and Terry Road, 10 p.m.-6 a.m.

**One westbound lane may be closed in Smithtown between Terry Road and Mt. Pleasant, 10 p.m.-6 a.m.

**One westbound lane may be closed in Port Jefferson Station between Route 112 and Terryville Road, 10 a.m.-3 p.m.

**One eastbound lane may be closed in Port Jefferson Station between Terryville Road and Davis Avenue, 10 a.m.-3 p.m.

**One eastbound lane may be closed in Hauppauge between Route 111 and Mt. Pleasant Road, 6 a.m.-11 a.m.

**One westbound lane may be closed in Smithtown between Terry Road and Mt Pleasant, 11 a.m.-3 p.m.

**One eastbound lane may be closed in Smithtown between Helen and Southern Boulevard, 7 a.m.-11 a.m.

ROUTE 878

**One lane either direction may be closed in Hempstead between Burnside Avenue and Rockaway Turnpike, 10 a.m.-3 p.m.

COUNTY ROAD 19/

PATCHOGUE-HOLBROOK ROAD

/Round The Clock

**One northbound lane may be closed in Holbrook between Main Street and Vacation Court.

**One southbound lane may be closed in Holbrook between Laurel Street and Smith Avenue.

PENINSULA BOULEVARD/b>

**One lane in either direction may be closed in Hempstead at Route 878, 10 a.m.-3 p.m.