Coordinated Traffic Incident and Congestion Management (TIM-CM): Mitigating Regional Impacts of Major Traffic Incidents in the Seattle I-5 Corridor

Within the Seattle metropolitan area, traffic incident management (TIM) operations provide a
multi-jurisdictional and coordinated strategy to detect, respond to, and clear traffic incidents so
that traffic flow can be restored quickly and safely. There is a need to extend TIM to include
congestion management (CM), a complex activity for managing incident-generated congestion
and for mitigating regional impacts after the actual incident has been cleared.

This project identified challenges and opportunities for the enhancement of regional TIM to
incorporate CM processes and operational coordination, supported by innovative technologies.
The researchers engaged regional stakeholders in a series of iterative scoping and participatory
design activities to identify and articulate desired enhancements to the regional management of
major incidents on the Seattle I-5 corridor. These activities were used to identify TIM and CM
stakeholders, identify and review relevant policy, work with stakeholders to model the “as-is”
TIM and CM processes and procedures, use the as-is model to facilitate stakeholders in
identifying current pain points and opportunities for system enhancement, and articulate desired
interventions made possible by innovative applications of emerging technology.

The report includes recommendations for enhancing regional TIM to incorporate CM and a five-stage
approach for conducting Phase 2 of this research.

Publication Date: 
Thursday, February 8, 2018
Publication Number: 
WA-RD 878.1
Last modified: 
03/08/2018 - 15:35
Mark Haselkorn, Sarah Yancey, Sonia Savelli
Washington State Transportation Center (TRAC-UW)
Number of Pages: 
Traffic incidents, Incident management, Nonrecurrent congestion, Traffic congestion, Regional transportation, Traffic mitigation, Improvements, Technological innovations, Freeway management systems, Congestion management systems, Recommendations.