A former Adelphi University president faces upgraded charges in connection with an alleged drunken driving crash at the LIRR Nassau Boulevard station last week, in which she "narrowly" missed commuters, drove onto the tracks and caused an electrical explosion, a felony complaint shows.

Police had previously charged Christine Riordan, 60, with misdemeanor driving while intoxicated after the Sept. 30 crash at the Long Island Rail Road Station in Garden City, which is not far from the academic institution she once led. She now faces felony charges of second-degree criminal mischief and first-degree reckless endangerment.

Public records indicate Riordan pleaded not guilty in Nassau First District Court in Hempstead on Tuesday.

Riordan's lawyer, Steven Gaitman, said in an emailed

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