The San Francisco-Oakland Bay Bridge’s westbound deck will be closed this Presidents’ Day  weekend but the eastbound deck will remain open.

The closure is to start at 8 p.m. Friday and is scheduled to end at 5 a.m. Tuesday, although officials warn that any bad weather could delay the reopening.

Caltrans said the closure is necessary to allow crews to complete eastbound lanes of the new $6.3 billion portion of the bridge being built between Oakland and Treasure Island. The new part is expected to be completed by Labor Day 2013. Crews over the weekend will complete a westbound detour west of the toll plaza, basically shifting the westbound lanes a bit south and out of the way of the new eastbound lanes.

If you’re going to Treasure Island or Yerba Buena Island, you’ll have to take the eastbound deck. From the islands, westbound lanes will be available to return to San Francisco, Caltrans said.

For more information about the bridge project, including a video explaining the weekend work, CLICK HERE.

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