There are many reports, maps and other documents related to the I-405 Corridor projects. All are available on the state Department of Transportation's I-405 Project website.
Major documents include the master plan for I-405 improvements, which is the environmental impact statement for the project (approved in October 2002) with some additions from WSDOT. The master plan outlines transit, roadway and environmental investments, including more than 300 improvements. The interactive I-405 Corridor Map helps illustrate the planned improvements.