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Practices

Transportation DesignTransportation PlanningTransit & Urban Mobility

Markets

Local Government

Priorities

Complete Corridors

Seattle advances a multimodal vision 

As Seattle’s urban neighborhoods grew, its major corridor faced rising congestion and limited space for multimodal travel. To improve service and reliability, SDOT engaged CDM Smith to study high-capacity transit options along its Roosevelt to Downtown corridor and develop a concept that balanced BRT improvements with significant right-of-way constraints.  

Comparing transit alternatives 

CDM Smith assessed options using a qualifications-based tool, helping SDOT select BRT as the most effective corridor solution. 

Optimizing multimodal design 

Right-of-way designs balanced space limitations with targeted improvements at the most constrained segments. 

Engaging communities early 

Extensive outreach helped identify priorities early in the process, guiding design decisions across several neighborhoods. 

Soliciting powerful feedback 

Teams uncovered the most desired improve­ments via an extensive yet flexible public outreach approach.  

“The best BRT projects are also Complete Corridors projects,” said Tim Sorenson, transit & urban mobility expert. “They not only accommodate bus and car traffic but also pedestrians and bikes.” Sorenson noted that the combination of these design elements helps SDOT achieve their goals to improve transit speed and reliability and traffic flow, while maximizing safety and access for all users.  

Curious to learn more? 

Connect with an expert to find out how we delivered this project.

Sorenson_Tim_2021.jpg

Tim Sorenson, PE

Transit & Urban Mobility Practice Leader

Tim has spent more than 30 years creating sustainable, community-focused transportation solutions integrating mobility, infrastructure, and the environment.

Practices

Transportation DesignTransportation PlanningTransit & Urban Mobility

Markets

Local Government

Priorities

Complete Corridors

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