Generation and Assessment of Incident Management Strategies. Volume III: Seattle-Area Incident Impact Analysis--Microcomputer Traffic Simulation Results

This four-volume technical report describes a study of freeway incidents and incident management strategies in the Seattle area. The study statistically analyzed the frequency and duration of freeway incidents on sections of I-5 and SR 520 in Seattle. In addition, a traffic simulation model was operationalized to assess the traffic related impacts of incidents. The findings show that Seattle-area incident management currently responds well to inclement weather and special events (e.g., major sporting games) but has problems with severe accidents. The ongoing operationalization of accident investigation sites and incident equipment storage sites can be expected to improve severe accident management, but response personnel training and the addition of more dedicated tow truck service are also needed. Finally, the study shows that, from a traffic impact perspective, the section of I-5 in downtown Seattle is in need of the most incident management attention.

Publication Date: 
Monday, January 1, 1990
Publication Number: 
WA-RD 204.4
Last modified: 
10/12/2016 - 15:42
Dan H. Garrison, Fred Mannering, Brad Sebranke.
Washington State Transportation Center (TRAC)
Number of Pages: 
Accidents, Evaluation, Freeways, Guides to the literature, Impact studies, Literature reviews, Management, Special events, Statistical analysis, Time duration, Traffic incidents, Traffic simulation, Urban areas, Weather.