SEATTLE — Drivers should buckle up for another round of road closures as another phase of the Alaskan Way viaduct prepares to get torn down. 

On September 12, crews will close South Dearborn Street and narrow First Avenue South to two lanes on either side of the intersection. South Dearborn Street will be closed for up to ten days while crews remove the viaduct overhead, WSDOT said. 

While this work is happening, WSDOT's contractor will pull their work zone back from Alaskan Way so the street has its full four lanes open during the closure. The South Dearborn Street - First Avenue South intersection is also a heavily trafficked bus stop. King County Metro has already made changes to its routes due to the viaduct demolition. 

Viaduct demolition South Dearborn Street
The two remaining sections of the viaduct at South Dearborn Street may not look big, but removing them is complex due to the underground utilities.
WSDOT

Also See: West Seattle, Burien buses being rerouted to ease delays from Viaduct demolition

Demolition of the viaduct has been an ongoing project since the start of 2019. Photos released by WSDOT show just how much has changed in just a few months this summer.

Viaduct before-after Yesler Way
The viaduct demolition at Yesler Way before and after.
WSDOT

The demolition is just one part of Seattle's plan to update its transportation infrastructure to match the city's growing mobility needs.

Viaduct Demolition before-after S King Street
Before and after the viaduct demolition at South King Street.
WSDOT

Seattle saw one of the highest population growths compared to other cities with 50,000 people or more between 2017 and 2018, according to data released earlier this year from the U.S. Census Bureau. 

Between July 1, 2017 and July 1, 2018, Seattle grew by 15,354 people. The total population last year hit 744,955, according to the Census. 

And more people means more cars on the roads. The average Seattle commuter wastes about 78 hours a year stuck in traffic, according to a Texas A&M Mobility Report released earlier this year. 

That's compared to the national average commuter who spends 54 hours in congestion. 

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