A motorcyclist is dead Monday after he was struck from behind on a highway by a speeding driver, who fled the scene but was caught a short time later by cops.

Police say the the motorocyclist was travelling eastbound on the Horace Harding Expressway at about 1 a.m. and heading to the Long Island Expressway, near Junction Blvd., when the driver of a late model white Mercedes Benz crashed into him from behind.

The impact of the crash sent the motorcyclist flying into a concrete wall and his 2002 Harley Davidson mangled. The driver of the car fled the scene.

Responding officers and EMS workers arrived shortly after the crash and the motorcyclist was pronounced dead at the scene.

Officers spotted the Mercedes Benz, which had front-end damage, and arrested the driver.

He is expected to be charged with leaving the scene of an accident, driving while intoxicated and vehicular manslaughter. His name was not immediately released.

The identity of the motorcyclist is pending family notification, but reports say the victim was male.