Washington DC Party Shuttle shut down, called 'imminent hazard'

The party is over for Washington-based "party shuttle" operator, at least for now.

The Department of Transportation has ordered that Washington DC Party Shuttle immediately stop operating, declaring the service an "imminent hazard to public safety." It's the first time a passenger carrier has been shut down after the agency dispatched safety investigators to look into high-risk passenger carrier.

A nearly month-long investigation into the operator, which also brands itself as Onboard DC Tours, revealed that officials didn't monitor drivers or ensure that they complied with federal drug and alcohol test requirements. In one instance, DOT officials say one driver was allowed to work despite testing positive for a controlled substance.

The Federal Motor Carrier Safety Administration also alleges that the carrier doesn’t enforce a reasonable maintenance program.

In its order to shutdown, the FMCSA told Washington DC Party Shuttle that it must "drastically change its company and management philosophy" when it comes to drug and alcohol testing and the maintenance of its vehicles.