BART is still experiencing systemwide delays of 20 minutes or more late Saturday afternoon caused by an earlier equipment problem on the track at the 16th Street Mission station and by track work between Concord and Pleasant Hill/Contra Costa Centre on the Antioch line, BART officials said.
The equipment problem was first reported after 3 p.m. Saturday.
The specific failure was a blown insulator that helps confine electricity to the third rail that powers BART's trains. Trains were being single tracked between the Montgomery and 24th Street Mission stations Saturday afternoon.
The Contra Costa County track replacement work had been scheduled, and will last throughout this weekend. Free buses provided by the County Connection agency will take riders between the two stations while the tracks are closed for work.
The work will continue Sunday, as well as May 11-12, the three-day Memorial Day weekend on May 25-27 and June 8-9.