ENGINEERING PROJECTS Transportation Design Utilities and Site Services Surface Water Management Traffic Engineering Project Profiles WHAT WE DO > ENGINEERING > TRAFFIC ENGINEERING   Granite Falls Alternate Route, Snohomish County I-405 Traffic Control Plans, WSDOT Downtown Traffic Signal Plan, City of Everett     Downtown Signal Timing Plan—Everett, WA   The Downtown Signal Timing Plan used traffic simulation programs to demonstrate how traffic operated during different times of the day. Downtown stakeholders decided that traffic signals on major arterials needed to be timed to move large volumes of commuter and freight traffic, while signals in the interior core needed to be timed to assist pedestrian movements, bus movements, and traffic circulation to parking facilities.

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