Update: ‘Milestone’ tonight on Spokane Street Viaduct Widening Project – traffic shifting to new bridge deckDecember 22, 2011 at 4:15 pm | In Spokane St. Viaduct project, West Seattle news | 18 Comments
Just got word from SDOT about a “milestone” they’re planning overnight tonight during another construction closure of the westbound Spokane Street Viaduct:
Westbound traffic on the Spokane Street Viaduct will be shifted onto the newly constructed bridge deck tomorrow morning, December 23, in advance of the morning commute, marking a major milestone in this multi-year project. The new structure, built adjacent to the current structure, will nearly double the width of the viaduct, adding 41 feet.
Motorists will find the shift to be seamless, maintaining the current two lanes of traffic in each direction; however, the posted travel speed for westbound traffic will be temporarily reduced to 25 miles per hour (down from 35 miles per hour) until the project is completed this coming summer. The remaining construction work requires westbound travel lanes to be narrower than standard lane widths. This, in addition to the presence of construction vehicles entering and exiting travel lanes, requires a lower travel speed for driver safety.
Following this initial traffic shift, the contractor will connect the old and new structures, construct a new center median between the old and new structures, and install new lighting in the median. Over the next few months, eastbound traffic will be shifted from the south side to the north side of the old structure so that the contractor can begin demolition of the existing south barrier. This spring, eastbound traffic will be temporarily moved over to the new viaduct so that the old bridge deck can be repaired and repaved. At that point, eastbound traffic wishing to exit to SODO will still be able to do so, using either the First Avenue S off-ramp or the Fourth Avenue S loop ramp exit.
As we reported previously, the new 1st Avenue South on/offramp on the westbound side is not expected to “fully” open before next summer.
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