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List of long tunnels by type - Wikipedia

Getting around using the tunnel. The new tunnel provides a direct route under downtown from the stadiums to the Space Needle. The south end connects to Alaskan Way and downtown, the north end connects to Seattle Center and South Lake Union.

Building a highway inside a tunnel - YouTube

Highways Department | 路 政 署

The new SR 99 tunnel under downtown Seattle | WSDOT

Highway and Rail Transit Tunnel Inspection Manual. Superseded 2005 Edition

Highways Department | 路 政 署

To overcome the knowledge gaps within the highway tunnel community, the coupled behavior of FFFS-EVS within a highway tunnel environment must be better understood using established methods such as computer simulation, laboratory experiments, and full-scale testing.

Highway and Rail Transit Tunnel Inspection Manual

Here’s how the Highway 99 tunnel will shake up your travel routine The north portal of the new Highway 99 tunnel shows the entry to the southbound lanes under Harrison Street.

Tunnel - Wikipedia

Alibaba.com offers 882 highway tunnel light products. About 9% of these are led tunnel lights, 4% are other lights & lighting products. A wide variety of highway tunnel light options are available to you, such as free samples, paid samples.