Definition of Northern state parkway

The Northern State Parkway is a long limited-access parkway on Long Island in the U.S. state of New York. The western terminus is at the Queens-Nassau County line, where the parkway continues westward into New York City as the Grand Central Parkway. The eastern terminus is at New York State Route 347 and New York State Route 454 in Hauppauge. The parkway is designated New York State Reference Route 908G, an unsigned reference route. As its name implies, the parkway services communities along the northern half of the island.