Seattle Department of Transportation – Seattle, WA

Seattle Transit Master Plan

Seattle has ambitious growth plans, expecting 200,000 new residents and 200,000 new jobs by 2030. Despite traffic congestion throughout the city, there are no plans or opportunities to add motor vehicle capacity, so the bulk of the city’s growth must be accommodated by making more efficient use of the existing street network and by investing in rapid transit.

To help Seattleites understand its future mobility needs, Nelson\Nygaard led an intensive stakeholder process that started with a detailed market analysis and the establishment of outcome-focused goals and measures of success. We then examined a broad array of corridors and used a multiple account evaluation approach to prioritize those that offered the greatest opportunity. Only then did we look at what type of transit technologies made the most sense in each corridor.

The final report identified land use and programmatic changes necessary to make transit successful, including coordinated bicycle and pedestrian improvements. The plan prioritizes four high capacity corridors and we developed detailed speed and reliability capital programs for 15 priority bus corridors.

This data-driven, outcome-focused, stakeholder-led approach resulted in an unprecedented level of consensus on Seattle’s mobility future. The City is now moving forward on alternatives analyses in preparation for construction.