Read about the 520 plan here. It’s what they told me earlier this month, but I didn’t completely believe them. It’s basically a lot of tolls and the expectation that the viaduct won’t use much of the state’s special project money.

On the subject of the viaduct, you probably have already heard that Seattle’s Council approved $8.1 million for the study of a surface/transit option. Hopefully Light Rail could be part of the surface transit option, since the cost of a light rail system around there through West Seattle could be comparable to the difference in cost of the surface transit from the rebuild. The difference from the tunnel could pay for a new subway practically .

Project Cost (in millions)
Tunnel $3,600 to $4,100
Rebuild $3,200 to $3,500
Surface Roads ~$1,600
East Link Light Rail to Downtown Bellevue $1,465.2 to $1,684.9
Light Rail from University of Washington to Northgate* $1,126.6 to $1,239.3


*Includes about 3 miles of cut-and-cover bored subway.

If they can build rail from Seattle to Bellevue for less than $2 billion and imagine what they can do with the difference from the surface roads improvments and either the tunnel or the rebuild. They could connect light rail from Burien to West Seattle to Sodo and build a subway through Belltown to Seattle Center and maybe even connect rail through Ballard for the $3.5 potential difference between a tunnel and surface roads. I bet that plus the roads option would get more total people through than either the rebuild or the tunnel, and with the state’s new definition of capacity, that’s what should be done.

Update: someone wanted links to the numbers, so here they are for Sound Transit. Click on the project and a pdf will open with the cost estimate. For the Viaduct, I got the numbers from Wikipedia.

2 Replies to “RTID did have a plan for 520, Viaduct is expensive”

  1. It’s a dream.

    A good dream.

    A dream that probably won’t happen, even though it’s the smart and right thing to do.

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