SAN FRANCISCO (CBS SF) -- BART riders should expect delays until about 2:30 p.m. Monday as  construction in the Transbay Tube continues.

BART has shut one of the two tracks in the Transbay Tube to  perform maintenance and repair work to electric cables. Construction will  continue next weekend, BART spokesman Linton Johnson said.

The repair work means that riders who use the tube to cross the  San Francisco Bay could face delays of between 20 and 40 minutes.

While the work is being performed, passengers who are traveling  from stations in San Francisco and the Peninsula toward Dublin or Fremont  will need to transfer at the 12th Street station in Oakland to a special  Dublin- or Fremont-bound train, Johnson said.

BART customers traveling from Fremont or Dublin to San Francisco  and the Peninsula should board their normal trains but those trains will be  diverted to the MacArthur station in Oakland.

Riders will then have to get off their train at the 12th Street  station in Oakland and go downstairs to transfer to a San Francisco-bound  train.

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