Washington State Department of Transportation

10 DOTs win 2016 Perpetual Pavement Award
VIDEO: WSDOT building world's first flexible bridge
WSDOT fabricators make all traffic signs for the agency at cost
The engineering behind the new earthquake-proof bridge near Seattle's SR99 tunnel project
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Twelve finalists named for America’s Transportation Awards Grand Prize, People’s Choice Award
Bertha's repairs push Seattle's SR99 tunnel $200 million over budget. And it could get worse
Bertha will soon begin digging below the viaduct its path will replace
WSDOT bridge inspectors detail their work to a curious public
Bertha back to drilling after suspension is "conditionally lifted"
Washington governor halts Bertha tunneling after sinkhole forms
Bertha breaks through repair wall and begins tunneling soil once more (VIDEO)
Bertha is nearly ready to start tunneling again (VIDEO)