SR 99 Tunneling machine animation WSDOT » This animation shows how the world’s largest tunneling machine works. By Michelle|2018-02-05T12:49:12-08:00May 8, 2013|Alaskan Way Viaduct, Design-Build, Highways, Washington|Comments Off on SR 99 Tunneling machine animation Share This Story, Choose Your Platform! FacebookTwitterRedditLinkedInWhatsAppTelegramTumblrPinterestVkXingEmail About the Author: Michelle Related Posts ‘A fiasco from the beginning’ — Caltrans’ costs soar on $1.1 billion San Francisco tunnels ‘A fiasco from the beginning’ — Caltrans’ costs soar on $1.1 billion San Francisco tunnels Getting There: Congestion pricing isn’t coming to Spokane, but these roads aren’t free and never were Gallery Getting There: Congestion pricing isn’t coming to Spokane, but these roads aren’t free and never were Multi-billion, decade-long toll road plan gets green light, but bottlenecks loom Gallery Multi-billion, decade-long toll road plan gets green light, but bottlenecks loom Carbon fee returns in Olympia as lawmakers consider $15 billion transportation package Gallery Carbon fee returns in Olympia as lawmakers consider $15 billion transportation package