SAN FRANCISCO (KCBS)— Thousands of Bay Bridge commuters heading from Oakland to San Francisco may have to endure some delays, but that won’t be for several months.

Caltrans officials just celebrated a major milestone in the construction of the new Eastern span of the Bay Bridge.

The 28th and final deck section is now in place. The piece weighed more than one-thousand tons.

Caltrans spokesman Bart Ney said this latest construction development didn’t impact commuters, but that won’t last.

“The next thing that’s going to be happening that motorists definitely need to know about, is a westbound detour that’s happening where we’re going to have to close the bridge for a couple of days,” Ney said.

He specified it will probably happen sometime in February and that the work is necessary.

“We’re doing this so that we can move traffic a little bit to the south and to allow a construction crew to get in and complete critical work,” Ney added.

According to Caltrans, this particular operation will pave the way for the opening of the new Eastern span of the Bay Bridge by 2013.

The Bay Area will then be home to the world’s largest self-anchored suspension bridge.

(Copyright 2011 by CBS San Francisco. All Rights Reserved. This material may not be published, broadcast, rewritten, or redistributed.)