Dr. Gridlock gives tips on getting around during problems on Metro's Blue, Orange and Silver lines.
A pedestrian was hite by a train and killed in Beltsville.
Incident involved a tractor trailer.
First there was a medical emergency on Metro's Red Line. Then there were delays on the Orange Line because of a disabled train.
Massachusetts Avenue is closed from Duvall Street to the traffic circle where Montgomery County and the District meet.