The Long Island Motor Parkway, also known as the Vanderbilt Parkway, Vanderbilt Motor Parkway, or Motor Parkway, was a limited-access parkway on Long Island, New York, United States. It was the first highway designed for automobile use only. The parkway was privately built by William Kissam Vanderbilt II with overpasses and bridges to remove most intersections. It officially opened on October 10, 1908. It closed in 1938 when it was taken over by the state of New York in lieu of back taxes. Parts of the parkway survive today, used as sections of other roads or as a bicycle trail.

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] }William Kissam Vanderbilt II, the great-grandson of Cornelius Vanderbilt, was an auto-racing enthusiast and created the Vanderbilt Cup, the first major road racing competition, in 1904. He ran the races on local roads in Nassau County during the first decade of the 20th century, but the deaths of two spectators and injury to many others showed the need to eliminate racing on residential streets. Vanderbilt responded by establishing a company to build a graded, banked and grade-separated highway suitable for racing that was also free of the horse manure dust often churned up by motor cars. The resulting Long Island Motor Parkway, with its banked turns, guard rails, reinforced concrete roadbed, and limited-access, was the first limited-access highway in the world.

The road was originally planned to stretch for in and out of New York City as far as Riverhead, the county seat of Suffolk County and point of division for the north and south forks of Long Island. Only (from Queens in New York City to Lake Ronkonkoma) were constructed, at a cost of $6 million. Construction began in June 1908 (a year after the Bronx River Parkway). On October 10, 1908, a section opened as far as modern Bethpage. It hosted races in 1908 and on the full road in 1909 and 1910, but an accident in the 1910 Vanderbilt Cup, killing two riding mechanics with additional injuries, caused the New York Legislature to ban racing except on race tracks, ending its career as a racing road.