Summary: BART’s new East Bay extension to Antioch is already rocketing off the charts. Opened in late May at a cost of $525 million, the 10-mile link from Pittsburg to Antioch is averaging 3,800 weekday riders — well above the 2,800 BART initially estimated. “And there likely would be even more riders, but there’s no room in the parking lot,” said BART Board Director Joel Keller, whose east Contra Costa County district includes the new station.
