WMAR-TV, ABC-2 in Baltimore, MD, 6/29/15:
Crash involving bus, car, light rail shuts down part of Howard Street
A car collided with a light rail vehicle and a Maryland Transit Administration bus Monday morning on N. Howard Street, MTA police said.
Bizzare story is here.
Does not qualify for my intra-agency topic because the bus and light rail were in the same side, attacked by a car.