A Kings Park woman initially charged with driving drunk was arraigned Wednesday on upgraded grand jury charges in connection with a fatal, head-on collision in March, the Suffolk County district attorney's office said.

Natalia Simons, 36, pleaded not guilty to a 12-count indictment that included aggravated vehicular homicide, vehicular manslaughter in the first and second degrees, assault, aggravated driving while intoxicated, reckless driving, speeding and failure to maintain lane.

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On March 13, she was going north on Route 25A in Smithtown when she veered into the southbound lanes and hit a Toyota Camry, killing driver Larry Garwood, 59, of Island Park, police had said.

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Her blood alcohol level was .18 percent, according to the indictment. Under state law, a person with a blood-alcohol level of 0.08 percent is considered intoxicated.

Simons' attorney could not be immediately reached Wednesday. She remained free on a $50,000 cash bail.