The Long Island Rail Road, often called the LIRR, is a commuter rail system in New York. Its lines travel from Manhattan to Suffolk County on eastern Long Island. Over 334,000 people ride the LIRR every day. It is North America's busiest commuter railroad. It is also one of the few commuter systems in the world that runs 24 hours a day, 7 days a week, 365 days a year.