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.

See alsoCheck live traffic conditions

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

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** 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.