The Alaskan Way Viaduct Stakeholders Group appears to be coalescing around the idea of keeping a deep-bore tunnel option "on the table," with the caveat that current cost estimates put the tunnel at $3.5 billion. That's the most expensive option of all the ones the group considered, but tunnel proponents—among them the Discovery Institute and city council transportation chair Jan Drago—are skeptical that it will really cost that much, pointing out that Sound Transit's deep-bore tunnel cost only about $300 million.
Never mind that Sound Transit's tunnels, at 21 feet in diameter, are about half the size a tunnel replacing the viaduct would need to be; or that a roadway tunnel has to meet much stricter life-safety and ventilation standards than a light-rail tunnel; or, for that matter, that it takes a lot more concrete and steel to carry tens of thousands of cars and trucks than it does to hold a light rail train.
As long as leaving the tunnel "on the table" (i.e., putting it off until the indefinite future) ends discussion of all the elevated freeway options, surface/transit proponents should let the deep-bore fans have their fantasy. Tear down the viaduct, build a new surface street, and get moving on transit improvements now. By the time it becomes obvious that a 50-foot-wide tunnel underneath downtown actually would be as expensive as state and city transportation engineers say it would be, the surface street will be up and running, and the most damaging options—a rebuilt viaduct, or Frank Chopp's walled-off mall/freeway in the sky—will be off the table.
You've looked at the surface option, right? You realize that it turns Western into a northbound one-way? Explain to me how that "improves the downtown street grid". Explain to me how it doesn't kill all the businesses along Western.
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