The 23-year-old driver was headed the wrong way on the Gowanus Expressway in Bay Ridge when he crashed into the guard rail near the Fort Hamilton Parkway ramp around 2:20 a.m.
The driver's 29-year-old passenger was pronounced dead at NYU Langone Brooklyn.
Police have taken the driver into custody and are investigating whether they were driving while impaired.
The eastbound Gowanus Expressway ramp to Fort Hamilton Parkway has reopened.
The 86th Street on-ramp to the Gowanus Expressway is also reopened.
Charges against the driver are pending.
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