Official site. Includes traffic flow maps and cameras, mountain pass reports, ferry and train schedules, emergency highway closures, construction updates, and major project information.

Association of organizations and private citizens who want to prevent the construction of a new facility in downtown Seattle. Includes in-depth analysis.

Information and photos on roads in Washington, Oregon, Idaho, and northern California.

Route log.

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.

Basic route log.

Covers various examples in the region. Includes photographs.

Includes entries in weblog form. Includes background.