BetterBridge.org: Website by two designers of a proposed replacement of the State Route 520 Evergreen Point Bridge in the Seattle vicinity. Includes diagrams and press coverage.
Highways in Washington State: Basic route log.
Highways of Washington State: Route log.
Northwest Highways: Information and photos on roads in Washington, Oregon, Idaho, and northern California.
People's Waterfront Coalition: Association of organizations and private citizens who want to prevent the construction of a new facility in downtown Seattle. Includes in-depth analysis.
Seattle Area Transportation: Information on community transit, Metro online, van- and carpooling, bicycling programs, speed traps, Department of Transportation, and ferry services.
Washington State Department of Transportation: Official site. Includes traffic flow maps and cameras, mountain pass reports, ferry and train schedules, emergency highway closures, construction updates, and major project information.