A subway motorman who caused an infamous drunken 1991 train crash in which five passengers died was the victim of a serious accident himself Thursday, when he was critically injured by a hit-and-run driver in The Bronx.

Robert E. Ray, whose speeding downtown No. 4 train derailed near Union Square more than 23 years ago, was struck at Grand Concourse and East 182nd Street at 8:45 p.m., according to law enforcement sources.

The driver of the car fled the scene and Ray was rushed to Bronx-Lebanon Hospital, where he was listed in critical condition.

As a motorman, Ray fled the scene on Aug. 28, 1991, with a blood-alcohol level more than twice the legal limit when his train derailed just after midnight.

He later admitted to drinking scotch and beer prior to his overnight shift. An empty crack vial was found in his motorman’s cab, but it was not clear if it was his.

In addition to the fatalities, more than 200 were injured when his train switched tracks on a curve at high speed and derailed.

The 10-car train carrying about 500 passengers slammed into steel pillars.

But Ray simply walked away from the crash, and drank three more beers while heading to his Bronx home, where he was arrested more than 12 hours later.

Ray was convicted in 1992 of manslaughter. He was released after serving 10 years of a 15-year sentence.

His last listed address was a temporary housing facility for men who are homeless or have been released from prison.