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VIDEO: FLY SEATTLE'S SR 99 TUNNEL
Go two miles in two minutes under downtown Seattle to see the progress on the city's double-decker underground highway.
Washington State's DOT does a great job using drones to show off some of its best work. This video captures the ongoing construction of the interior roadways, safety systems and other elements that will carry and safeguard drivers passing beneath downtown Seattle in the new SR 99 tunnel.