Question: Bethpage State Parkway begins with an interchange at which Long Island-based limited access highway?

Context:
Heckscher State Parkway
The Heckscher State Parkway (formerly known as the Heckscher Spur) is an 8.24 mi parkway on Long Island, New York, in the United States.
 The parkway, located entirely within the Suffolk County town of Islip, begins at the south end of the Sagtikos State Parkway in West Islip, from where it continues west as the Southern State Parkway.
 It proceeds east as a six-lane parkway through Brentwood and Central Islip, loosely paralleling New York State Route 27 (NY 27).
 At Islip Terrace, the Heckscher Parkway turns southward, crossing NY 27 before ending at the toll barrier for Heckscher State Park in Great River.
 The parkway comprises the eastern portion of New York State Route 908M (NY 908M), an unsigned reference route, with the Southern State Parkway occupying the western section.
 In order to avoid confusion, the highway is signed as an extension of the Southern State Parkway west of the NY 27 interchange (exit 44).
Memorial Parkway (Huntsville)
Memorial Parkway, also known as The Parkway, is a major thoroughfare in Huntsville, Alabama that carries over 100,000 vehicles on average a day.
 It, in whole or in part, follows U.S. Route 231, U.S. Route 431, U.S. Route 72, and State Route 53 through the Huntsville city limits.
 It is a limited access road through most of Huntsville city proper, providing exits to the frontage road which allow access to road intersections, as well as businesses and residences along the route.
 Both the limited access and frontage roads are referred to as Memorial Parkway.
 Originally constructed in the 1950s and officially opened on December 1, 1955, the highway is the major commercial thoroughfare through Huntsville, a status it has held since the mid-1960s.
M-66 (Michigan highway)
M-66 is a north–south state trunkline highway on the Lower Peninsula (LP) of the US state of Michigan.
 It runs from the Indiana state line in the south to Charlevoix in the north.
 M-66 is the only state highway to traverse almost the entire north–south distance of the LP.
 It starts as a continuation of State Road 9 (SR 9) which provides access to the Indiana Toll Road.
 The total length is 272.898 mi , which includes 3.374 mi of freeway between Interstate 94 (I-94) and downtown Battle Creek designated as I-194.
 One section of the highway is an expressway, a type of divided limited access highway, while the section along I-194 is a full freeway, otherwise M-66 is a two-lane rural highway.
 Two sections are listed on the National Highway System.
Texas State Highway 550
State Highway 550 (SH 550) is a highway under construction that, when complete, will be a limited access toll route around the northern and eastern edges of Brownsville, Texas, partly replacing and expanding Farm to Market Road 511 (FM 511).
 It is to provide a new entry point for truck traffic to the Port of Brownsville.
 It also forms a loop that allows traffic to bypass the northern sections of the urbanized extent of the Brownsville city limits.
 This may allow the loop to also serve as a relief route for future traffic congestion and as a future business corridor.
 The first stage of construction was expected to be completed in 2010, with bidding for the final sections currently underway.
 The first phase of the route opened on March 10, 2011, with tolling for the bridge over FM 1847 beginning on May 11, 2011.
 Phase two, which created a new limited access highway from FM 3248 to a new entrance to the Port of Brownsville, was opened on June 1, 2013.
 According to local officials, when the freeway is complete, it will be renumbered Interstate 169 (I-169) being an auxiliary route of Interstate 69E (I-69E).
Sagtikos State Parkway
The Sagtikos State Parkway, also known as the Sagtikos or Sagtikos Parkway, known colloquially as "the Sag" is a 5.14 mi north–south limited-access parkway in Suffolk County on Long Island, New York, in the United States.
 It begins at an interchange with the Southern and Heckscher state 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.
 Commercial vehicles are prohibited from using the Sagtikos State Parkway, a restriction that applies to most parkways in the state.
Southern State Parkway
The Southern State Parkway (also known as the Southern State or Southern Parkway) is a 25.53 mi limited-access highway on Long Island, New York, in the United States.
 The parkway begins at an interchange with the Belt and Cross Island parkways in Elmont, in Nassau County, and travels east to an interchange with the Sagtikos State Parkway in West Islip, Suffolk County, where it becomes the Heckscher State Parkway.
 The Southern State Parkway comprises the western portion of unsigned New York State Route 908M (NY 908M), with the Heckscher Parkway occupying the eastern section.
Bethpage State Parkway
The Bethpage State Parkway is a 2.49 mi parkway in Nassau County on Long Island, New York, in the United States.
 It begins at a trumpet interchange with the Southern State Parkway in the village of North Massapequa and serves Boundary Avenue, NY 24, and Central Avenue before terminating at a traffic circle with Plainview Road and a local park road in Bethpage State Park.
 The parkway is designated as New York State Route 907E (NY 907E), an unsigned reference route.
 It is also ceremoniously designated as the Philip B. Healey Memorial Parkway for Assemblyman Philip B. Healey (1921–1996).
Sunken Meadow State Parkway
The Sunken Meadow State Parkway (also known as the Sunken Meadow) is a 6.19 mi long parkway in Suffolk County, Long Island, New York.
 Located entirely within the town of Smithtown, the parkway begins at a cloverleaf interchange with the Northern State Parkway (exits 44–45) and the northern terminus of the Sagtikos State Parkway.
 The parkway, which continues north, is a northern spur of the Sagtikos, which opened in September 1952.
 The northern end of the parkway is at the toll barrier in exit SM5 in the Kings Park section of Smithtown.
 From there, the road continues north through Sunken Meadow State Park to a roundabout at the Long Island Sound.
 The parkway comprises the northern half of New York State Route 908K (NY 908K, an unsigned reference route), with the Sagtikos State Parkway forming the southern portion.
 Commercial vehicles are, like on most parkways, prohibited from using the Sunken Meadow, except for a portion north of NY 25A in Kings Park.
Alabama State Route 255
Research Park Boulevard (State Route 255 or SR-255) runs from I-565 to Bob Wade Lane on the north and west sides of Huntsville in Madison County, Alabama.
 Much of the route is a limited access highway, with the entire route planned to be limited access.
 Plans call for the road to be extended to create a near-complete bypass around Huntsville.
Bert T. Combs Mountain Parkway
The Bert T. Combs Mountain Parkway, commonly known as the Mountain Parkway, is a freeway in eastern Kentucky.
 The route runs from Interstate 64 just east of Winchester southeast for 75.627 miles (121.710 km) to a junction with U.S. Route 460 near Salyersville.
 The first 43 mi , beginning at the western terminus in Winchester is a four-lane limited access highway with only minor design standard differences from an Interstate Highway, while the remainder is a limited access Super two highway.

Answer: Southern State Parkway