As recently as 2014, the City of Sammamish commissioned a survey, seeking input on what issues are most important to residents - especially those the City can address. Here's a copy of that survey, listing "traffic congestion" as the biggest issue among respondents. Interestingly enough, four of the top seven issues listed are transportation-related - meaning close to 64% of all things mentioned as "most desired change" had to do with travel!
Transportation Plan Library
Here's a collection of items associated with the Sammamish Transportation Master Plan - some, providing policy support and direction for the work at-hand; others, documents developed showing draft concepts, strategies and recommendations. Follow along as the plan grows!