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.

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

** One eastbound lane may be closed in Holbrook at Exit 61, 10 p.m. to 5 a.m.

LIE SERVICE ROAD

** One westbound lane may be closed in Holbrook between Coats Avenue North and County Road 19, 10 p.m. to 5 a.m.

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 Exit 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

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

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

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** 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.

** One lane in either direction may be closed in Hempstead at Exit 19, 10 p.m. to 5 a.m.

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

NEW HIGHWAY

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** One northbound lane may be closed in Babylon between Hicks Street and Route 109, 10 a.m. to 3 p.m.

** One southbound lane may be closed in Babylon between Southern State Parkway overpass and Route 109, 10 a.m. to 3 p.m.

ROUTE 24

** One lane either direction may be closed in Hempstead between Route 110 and Meadowbrook State Parkway, 10 p.m. to 6 a.m.

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

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

** One lane either direction may be closed in Hempstead between Route Route 110 and Meadowbrook State Parkway. 10 a.m. to 3 p.m.

** One westbound lane may be closed in Elmont between Westgate and Belmont Boulevard, 9 a.m. to 3 p.m.

** One lane in either direction may be closed in Flanders between Cypress Avenue and Riverhead Old Quogue Road, 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 3 p.m.

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

ROUTE 25A

** 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 Islip between Brentwood Road and the merge lane, 10 p.m. to 5 a.m.

** One westbound lane may be closed in Islip between Route 27A and Southern State Parkway, 10 p.m. to 5 a.m.

** One westbound lane may be closed in Islip between County Road 57 and Robert Moses Parkway, 10 p.m. to 5 a.m.

** One westbound lane may be closed in Babylon between Route 109 and Route 110, 10 p.m. to 5 a.m.

** One westbound lane may be closed in Hempstead between Wantagh State Parkway and Meadowbrook State Parkway, 10 p.m. to 5 a.m.

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

** One eastbound lane may be closed in Westhampton between Exits 61 and 66, 10 a.m. to 3 p.m.

** One westbound lane may be closed in Westhampton between Exits 62 and 63, 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 106

** One lane in either direction may be closed in Oyster Bay between Route 107 and Bay Avenue, 10 p.m. to 5:30 a.m. and 10 a.m. to 3 p.m.

ROUTE 107

** One lane in either direction may be closed in Oyster Bay between Route 106 and Bay Avenue, 10 p.m. to 5:30 a.m. and 10 a.m. to 3 p.m. and

** One lane either direction may be closed in Oyster Bay between County Road 97 and Bay Avenue, 10 p.m. to 3 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 lane in either direction may be closed in Port Jefferson Station between Terryville Road and Canal Road, 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.

ROUTE 454/AROUND THE CLOCK

** One westbound lane may be closed in Hauppauge at Route 111.

ROUTE 908B

** One lane in either direction may be closed in North Hempstead between Helen Street and Route 107, 10 p.m. to 5:30 a.m.

CR19/PATCHOGUE-HOLBROOK ROAD/AROUND THE CLOCK

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