MERRIMAC, MASS. (WHDH) - Authorities are investigating a fatal single-vehicle crash that occurred on I-495 northbound in Merrimac on Wednesday night, state police said.

Troopers responding to a reported crash just south of Exit 53 determined a 2013 Nissan Rogue was traveling northbound when, for reasons still under investigation, the driver left the roadway and hit a tree in the median of the highway, according to state police.

The driver, a 44-year-old Amesbury man, was pronounced dead at Anna Jacques Hospital. His name has not been released.

The cause of the crash remains under investigation.

This is a developing news story; stay with 7NEWS on-air and online for the latest details.

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