Sagtikos State Parkway

Sagtikos State Parkway
Sagtikos State Parkway highlighted in red
Route information
Maintained by NYSDOT
Length	5.14 mi[1] (8.27 km)
Existed	September 29, 1952[2]–present
History	Constructed 1949–1952
Restrictions	No commercial vehicles
Major junctions
South end	Southern State Parkway / Heckscher State Parkway in West Islip
North end	Northern State Parkway / Sunken Meadow State Parkway in Commack
Location
Country	United States
State	New York
Counties	Suffolk
Highway system
New York Highways Interstate US State Reference Parkways

The Sagtikos State Parkway (known colloquially as "the Sag") is a 5.14-mile (8.27 km) controlled-access parkway in Suffolk County on Long Island, New York, in the United States. It begins at an interchange with the Southern State and Heckscher Parkways in the hamlet of West Islip and goes north to a large cloverleaf interchange with the Northern State Parkway in the Town of Smithtown, where the Sagtikos ends and the road becomes the Sunken Meadow State Parkway. The parkway comprises the southern half of New York State Route 908K (NY 908K), an unsigned reference route, with the Sunken Meadow State Parkway forming the northern portion.

The Sagtikos Parkway was proposed by the Long Island State Park Commission to help bridge a gap in the eastern part of the Long Island Parkway system. Construction began in 1949 with the opening of an interchange between Bay Shore Road and the Southern State Parkway. Work on the parkway itself began the following year, with plans calling for connections to three spurs: the Captree State Parkway (now Robert Moses Causeway), the Sunken Meadow Spur (Sunken Meadow State Parkway), and the Heckscher Spur (Heckscher State Parkway). The parkway was completed in 1952, closing the highway loop on Long Island.

Commercial vehicles are prohibited from using the Sagtikos – a restriction that applies to most parkways in New York.