Accountability – Congestion & Multimodal Mobility reporting

Following an extensive stakeholder engagement process, WSDOT has replaced its Corridor Capacity Report with the interactive online Multimodal Mobility Dashboard (MMD). The MMD provides annual multimodal mobility performance information on select state-owned facilities. With its interactive, user-friendly format and expanded areas of analysis, the MMD is WSDOT’s latest advance in this type of reporting.

What is the Multimodal Mobility Dashboard? The MMD’s highway analysis focuses on the state’s most-traveled commute corridors, analyzing congestion and the strategies used to mitigate it—including public transportation and WSDOT’s Incident Response program. Where data is available, the MMD also analyzes multimodal freight mobility as well as travel by passenger rail, ferry, airplane, and walking and biking. The most recent annual data available for most measures is for 2019. 

The Multimodal Corridor Capacity Report

WSDOT's annual multimodal Corridor Capacity Report (pdf 5.1 mb) (previously the Congestion Report) was the predecessor to the Multimodal Mobility Dashboard. The Corridor Capacity Report was published annually from 2007 through 2018. 

In addition to the multimodal Corridor Capacity Report, a data Appendix (pdf 2.7 mb) covers detailed performance measures in the form of tables, additional graphs, and information on all commute routes. WSDOT's Handbook for Corridor Capacity Evaluation (pdf 5.9 mb) is a comprehensive methodology tool for implementing system performance measurement. The multimodal Corridor Capacity Report includes an online story map that lets readers explore data from the report in a visual format using interactive tools. Both interactive online Multimodal Mobility Dashboard and The multimodal Corridor Capacity Report informs the Legislature, stakeholders, education and research institutions, the media, communities and the public about the state of congestion and transportation capacity in Washington State.

Mobility updates

The Gray Notebook includes quarterly and annual updates on key mobility programs that help to mitigate congestion and provide alternate commute options: the Incident Response Program, Washington State Ferries (WSF), and Amtrak Cascades. For WSF and Amtrak Cascades, these reports track key performance metrics such as ridership, on-time performance, and service reliability, and for the Incident Response program, the number of incidents cleared statewide and average clearance times. The annual Commute Options report tracks programs and trends like the percentage of Washington drivers who commute alone and alternative commute programs such as state-supported vanpools.

Practical Design & least cost planning offer solutions

WSDOT uses least cost planning and practical design strategies to fight congestion while enabling more flexible and sustainable transportation investment decisions. As part of its regular congestion reporting, WSDOT shows how its programs and projects use these and other strategies to help fight congestion. Please visit the Practical Solutions website for more information.

In addition, WSDOT uses its real-time data collection tools to help commuters plan their trips in ways that avoid or reduce additional congestion:

WSDOT is recognized for its commitment to accurate and quality reporting on congestion. Since 1988, the department has been collecting, analyzing, and reporting on congestion to help the public and officials better understand how congestion is evolving and what mitigation strategies are effective for improving commutes. In 2007, the Legislature amended RCW 47.01.012 to create six transportation policy goals, including Mobility – Congestion Relief. WSDOT has adapted and expanded its congestion reporting to include mobility and congestion relief programs in all of its strategic and performance-based reporting, including the Gray Notebook.

Past congestion publications