The greatest golfers in the world have descended on Long Island as Shinnecock Hills Golf Club is set to host the 118th U.S. Open.

Official practice rounds begin today, and the championship begins on Thursday.

MORE: U.S. Open Guide

MORE: Parking and Transportation Information
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Some fans are concerned about getting there after transit problems during Saturday's Belmont Stakes.  But officials say they're on top of it. "We're fully prepared to respond to any situation. We'll have additional trains ready," says LIRR President Phil Eng.

There is no general parking or parking for fans in the immediate vicinity of the golf course. Complimentary parking and shuttle service will be provided at the Francis S. Gabreski Airport.