#tunnel-design

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San Francisco
fromABC7 San Francisco
2 weeks ago

VTA sticking with single tunnel BART plan after report reveals high cost of twin bore design

VTA considers switching from single tunnel to twin tunnels for the Silicon Valley BART Expansion project.
London music
fromianVisits
4 months ago

HS2's northwest London portal designed to eliminate sonic booms from high speed trains

HS2 implements innovative tunnel extensions to prevent sonic booms from high-speed trains entering at 200mph.
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