Back to the Future focuses on the planning and development of transportation infrastructure in Seattle and the Puget Sound region in the years since World War II. Because this subject is so vast, Back to the Future focuses on six individual topics; The Construction of Interstate 5: Downtown Seattle through the University District by Kassandra Leingang; An Historical GIS Examination of the Interstate-5 Corridor by Scott Beckstrom; Seattle Bus Tunnel by Oran Viriyincy, Sounder Commuter Rail by Brian Mann; Central Link Light Rail: Planning and Performance by John Murphy, and The Waterfront Line: A History of Streetcars in Seattle and on its Central Waterfront by Andreas Piller. Compilation, research support, final editing and formatting is by Michelle Whitfield. Collectively the chapters offer insights into the history of some of the most important transportation projects in the region. They show how decisions were made and how initial proposals changed as they came to fruition.