An LIRR train running track tests collided with a farm tractor Tuesday afternoon in Laurel, sending one man to the hospital, an MTA spokeswoman said.

The crash at 2:53 p.m. occurred at a private farm crossing that is near Laurel Lane and has no gates, said MTA spokeswoman Meredith Daniels.

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The tractor driver suffered a leg injury and was airlifted to a hospital, while the train engineer, the only one aboard, was not hurt, she said.

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The westbound Long Island Rail Road train, which consisted of one engine car, was testing the track levels at the 40 mph speed limit when it slammed into the tractor, she said.

It was not clear why the tractor was on the tracks, she said.

Daniels said she was awaiting other details from Metropolitan Transportation Authority police.

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There was no damage to the rails and the tracks were cleared by 4:30 p.m., she said. Daniels said the evening rush hour on the Ronkonkoma branch, which uses those tracks to go to east to Greenport, will not be disrupted.