East-West High Capacity Transit Access Study
Snohomish County, WA
Snohomish County and Perteet formed an Agency Support Team consisting of Everett, Mill Creek, Lynnwood, WSDOT, Community Transit and Sound Transit with the goal of developing and agreeing on mobility solutions that would improve connections to the Sound Transit Light Rail Transit (LRT) Stations in Southwest Snohomish County, identified as part of ST3 Regional Transit System Plan. The first phase of the study began with a robust travel demand analysis covering the southwest part of Snohomish County. The results of the travel modeling suggest that Sound Transit Link Light Rail will add substantial regional capacity in the County, with 30,000-45,000 daily boardings each day on the segment between Lynnwood and Everett. The challenge was how to get riders to the planned stations.
In the first phase of the study, the team considered improvements in five different corridors and evaluated elements including community impacts, sensitive area impacts, flexibility in LRT station access, required right-of-way, costs and potential corridor travel demand. Based on this initial screening, three corridors were considered for additional refinement.
In the second phase of the study the team refined potential alignments and configurations that accommodates the most people crossing the I-5 corridor while reducing travel time for both transit and general traffic. Detailed travel time analysis for transit and general purpose traffic for each option was conducted, and opinions of cost updated. An example of how we summarized travel time analysis for each option is illustrated below.
The following table represents a tool we used to compare effectiveness of different options against different criteria.
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