Pittsburgh's public transit agency says light-rail riders could face delays.
The Port Authority of Allegheny County says a higher-than-usual number of light-rail vehicles are undergoing maintenance and inspection. The agency says that's preventing it from operating as many two-car trains as usual.
Light-rail is operating on its regular schedule, although riders could see delays and overcrowding.
The agency says it's making every attempt to put the vehicles back into service.