Excerpt: This study was conducted for Commute Seattle on behalf of the Seattle Department of Transportation to understand how commuters travel to Downtown Seattle and how those behaviors have shifted over time. The 2017 iteration of the study tracks the results from previous studies conducted in 2016, 2014, 2012, and 2010. The 2010 and 2012 iterations of the study were conducted by the Gilmore Research Group which was based in Seattle and ceased operations in 2013.