State inspectors ramped up roadside inspections on private intercity motor coaches by more than 600 percent following the I-95 casino bus crash that killed 15 people, officials said yesterday.

In the crackdown, which lasted from March 17 — five days after the fatal crash — to Wednesday, state DOT inspectors pulled over about 4,600 buses.

The figures were released at a meeting of the City Council’s Transportation Committee, chaired by James Vacca (D-Bronx).

In all, 850 drivers or their vehicles were hauled off the road — more than the number of all inspections performed last year.

The DOT checked only 615 intercity buses in all of 2010.

Ophadell Williams, the driver, had a criminal record, officials said. He was charged with manslaughter and reckless driving.

His bus was headed from a Connecticut casino to Chinaatown when it crashed on March 12 at the Bronx-Westchester border.