Eight MTA employees could face criminal charges for their roles in the widespread scandal involving subway-signal inspectors filing false and fraudulent reports, transit bigs said yesterday.

The Manhattan District Attorney’s Office may press charges against one supervisor and seven signal inspectors after an MTA sting found that they were dangerously cutting corners on the job by not inspecting the devices properly, said New York City Transit President Tom Prendergast.

MTA officials recently raided several locker rooms in the signals division and found photocopies of the bar codes that were supposed to be scanned off actual signal devices after inspections, Prendergast said.

The photocopies re portedly allowed workers to scan the bar codes from the comfort of their locker rooms instead of checking the devices, which prevent subway operators from ramming into trains stopped further down the tracks.

If the DA decides not to take action, the MTA will discipline the workers internally, Prendergast said.