State Route 9 Route Development Plan

This document represents the culmination of work products for the State Route (SR) 9 Route Development Plan (RDP) process and presents a summary of the findings and outcomes. SR 9 is a critical transportation link in Snohomish County that serves as the only major north-south alternative to Interstate 5. To better integrate planning and future design work, preparation of an RDP for SR 9 was initiated to identify and propose remedial actions for corridor needs beyond those already funded. This RDP provides a 20-year vision for the thirty mile study segment (from Bothell to Arlington) that establishes a blueprint for potential longer-range transportation improvements. -- Overview