The body was found at 6:47 a.m. on the eastbound Exit 31 of the Cross Island Parkway, according to NYPD.
The man, who has not been identified, was reportedly alive but unconscious and unresponsive when cops arrived on the scene.
He was pronounced dead upon the arrival of emergency medical technicians.
The medical examiner has not yet determined the cause of death, but the case is being investigated as a suicide.
Some commuters took to social media to write about what they had seen on their morning ride.
Saw a body hanging on the Cross Island Pkwy. Thats different from most other mornings…
— G.W. Gras (@GeeSteelio) September 2, 2015
Just saw a body hanging going east on the Cross Island Parkway#traffic#WTF
— Trini3 (@ralphk3) September 2, 2015