After Feinstein floated the idea in 2000, the commission undertook a 2-year study of its costs. It concluded that building a bridge from Highway 238 in Hayward to the Peninsula would cost $8.2B... cheaper than a new BART tube to SF but still costlier than the Bay could afford.https://twitter.com/ctuan/status/938523236802768896 …
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Ditto. Maybe a tunnel, rather than a tube.
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What’s the difference? One is fully underground versus riding on the bay’s seabed?
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totally.
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Also, a big bridge uses a lot of land wherever it transitions onto land. Tunnels can use land more efficiently.
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