Two weeks after an electrical glitch knocked San Francisco's BART train cars out of commission between two East Bay stations, the source of the problem remains mysterious.
Normal service has yet to resume, with train shuttles still being used as a temporary measure to take riders between the Pittsburg/Bay Point and North Concord/Martinez stations. According to a report from The Martinez Patch, the problem first reported the morning of March 16 continues to elude the agency's investigating crews.
It was reportedly a voltage spike that damaged the propulsion systems of about 50 train cars. Crews are moving the train cars most prone to propulsion equipment failure in this stretch of track off of the line. They are being replaced with other models that have more robust protective systems.