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

The state Department of Transportation said the closings are probable, 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.

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. to 3 p.m.

**Eastbound HOV lane may be closed in Huntington between Exits 51 and 52, 10 a.m. to 3 p.m.

**One westbound lane may be closed in Riverhead between Exits 71 and 73, 7 a.m. to 3 p.m.

**One eastbound lane may be closed in Riverhead between Exits 71 and 73, 10 a.m. to 3 p.m.

**One eastbound lane may be closed in Calverton between Exits 72 and 71, 10 a.m. to 3 p.m.

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**One westbound lane may be closed in Hampton Bays between Exits 70 and 71, 10 a.m. to 3 p.m.

**All westbound lanes may be closed in North Hempstead between Exits 37 and 40E, 10 p.m. to 5 a.m.

**Two eastbound lanes may be closed in Hempstead between Exits 40E and 42, 10 p.m. to 5 a.m.

**All eastbound lanes may be closed in Holbrook between Exits 60 and 61, 10 p.m. to 5 a.m.

**Eastbound HOV lane may be closed in Holbrook between Exits 58 and 60, 10 p.m. to 5 a.m.

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**All westbound lanes may be closed in Holbrook at Exit 61, 10 p.m. to 5 a.m.

**Westbound HOV lane may be closed in Holbrook between Exits 61 and 64, 10 p.m. to 5 a.m.

LIE SERVICE ROAD

**One eastbound lane may be closed in Holbrook between Laurel Street and Lisa Court, 10 p.m. to 5 a.m.

**One westbound lane may be closed in Holbrook between Smith Avenue and Laurel Street, 10 p.m. to5 a.m.

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HECKSCHER STATE PARKWAY/

AROUND THE CLOCK

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

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

SOUTHERN STATE PARKWAY

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

**Ramp at Exit 18 (Eagle Avenue) in Hempstead may be partially closed, 11 a.m. to 2 p.m.

**Peninsula Boulevard entrance ramp may be closed in either direction, 7 a.m. to 3:30 p.m.

**One westbound lane may be closed in Hempstead at Exit 23, 10 p.m. to 5 a.m.

**Peninsula Boulevard entrance ramp may be closed in either direction, 9 p.m. to 5 a.m.

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

ROUTE 24

**One eastbound lane may be closed in Hempstead between Wantagh Avenue and Meadowbrook State Parkway. 10 p.m. to 6 a.m.

**One lane in either direction may be closed in Hempstead between Bethpage Parkway and Main Street, 10 p.m. to 6 a.m.

**One northbound lane may be closed in Hampton Bays between Montauk Highway and Route 27, 10 a.m. to 3 p.m.

**One southbound lane may be closed in Hampton Bays between Bellows Pond Road and Route 27, 10 a.m. to 3 p.m.

ROUTE 25

**One lane in either direction may be closed in Smithtown between Meadow Road and Kings Park Road, 9 a.m. to 4 p.m.

**One lane in either direction may be closed in Orient between Orient Ferry and Tuckers Lane, 7 a.m. to 3 p.m.

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

ROUTE 27

**All lanes in either direction may be closed in Bay Shore between Brentwood Road and the merge lane, 10 p.m. to 5 a.m.

**One westbound lane may be closed in Hempstead between Route 135 and Wantagh State Parkway, 10 a.m. to 3 p.m.

**One lane in either direction may be closed in Hempstead between Wantagh State Parkway and Meadowbrook State Parkway, 7 a.m. to 3 p.m.

**One westbound lane may be closed in Hempstead between Meadowbrook State Parkway and Ocean Avenue, 10 a.m. to 3 p.m.

**One eastbound lane may be closed in Bay Shore between Manor Lane and Fifth Avenue, 10 a.m. to 3 p.m.

**One eastbound lane may be closed in Westhampton between Exits 62 and 63, 10 a.m. to 3 p.m.

**One westbound lane may be closed in Eastport between Exits 62 and 61, 10 a.m. to 3 p.m.

ROUTE 27 SERVICE ROAD

**One eastbound lane may be closed in Islip between Route 111 and the merge lane, 10 a.m. to 3 p.m.

**One lane in either direction may be closed in Babylon between Route 109 and Nicolls Road, 10 p.m. to 5:30 a.m.

ROUTE 101

**One lane either direction may be closed in North Hempstead between Route 25A and Harbor Road, 10 p.m. to 5:30 a.m.

ROUTE 106

**One lane in either direction may be closed in Hempstead between Route 105 and North End, 9 p.m. to 5:30 a.m.

**One lane in either direction may be closed in Hempstead between Route 105 and North End, 10 a.m. to 3 p.m.

ROUTE 107

**One lane in either direction may be closed in Oyster Bay between Route 106 and North End, 10 a.m. to 3 p.m.

**One lane either direction may be closed in Oyster Bay between Route 106 and North End, 10 p.m. to 5:30 p.m.

ROUTE 108

**One southbound lane may be closed in Cold Spring Harbor between Route 25A and Woodbury Road, 9:30 a.m. to 3 p.m.

ROUTE 112

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

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

ROUTE 231

**One lane in either direction may be closed in Dix Hills at Deforest Road, 10 a.m. to 3 p.m.

ROUTE 347

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

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

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

**One lane in either direction may be closed in Smithtown between Mount Pleasant Road and Terry Road, 7 a.m. to 3 p.m.

ROUTE 878

**All lanes in either direction may be closed in Hempstead between Burnside Avenue and Rockaway Turnpike, 10 p.m. to 6 a.m.

PENINSULA BOULEVARD

**All lanes in either direction may be closed in Hempstead at Route 878, 10 p.m. to 6 a.m.

CR19/PATCHOGUE-HOLBROOK ROAD/

AROUND THE CLOCK

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

CR19/PATCHOGUE-HOLBROOK ROAD

**One southbound lane may be closed in Holbrook between Expressway Drive North and Expressway Drive South, 10 p.m. to 5 a.m.