It happened around 5:30 a.m. Tuesday on the Bronx River Parkway at Allerton Avenue.
A 65-year-old man was trying to the cross the highway when he was struck by northbound vehicle.
The driver remained at the scene as police arrived.
All northbound lanes were closed for the investigation.
Video from NewsCopter 7 showed a large backup at the height of the morning rush hour as traffic was detoured off the parkway just south of the accident scene.
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