Resolution_Adopt 2023_2025 Kittitas County Safety Plan

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Table 1. Types of collisions, number of crashes and percent of crashes for Kittitas County, all counties -county maintained roads, and all public roads. 'Includes fatal and non-fatal 'Includes serous and non -serous. The 2017 - 2021 WSDOT provided collision data was further evaluated to determine the predominant crash types, contributing factors, and specific locations. As shown in Table 2 below, the predominant causes of fatal and serious injury collisions in Kittitas County are "hitting a fixed object' and "overturning." Crashes involving fixed -object hazards, or non -traversable roadside slopes within clear zone accounted for 44.80% of all fatal and serious injury collisions. Additionally, 20.70% of the fatal and serious injury collisions were caused by vehicles overturning. Unprotected roadside slopes steeper than 311orizontallVertical are considered non -traversable and contribute to overturning accidents. The predominant conditions where fatal and serious injury collisions occurred included higher speed roadways with low lighting conditions, and where roadway curvature was a factor. This accident data seems consistent for a county like Kittitas where most of the roadway network is rural without lighting features. Accidents tend to be more severe when speeds are higher and where low light conditions hinder driver acuity, especially in horizontal curves where drivers are more likely to leave the roadway. Non -intersection related collisions accounted for 72.40% of the fatal and serious injury collisions, although a large proportion of total accidents (non- injury, serious injury, and fatal) occurred at intersections and main corridors leading to potential for more serious accidents at these locations. For the fatal and serious injury collisions accident report details please see Appendix A. Kittitas County All Counties -Co. All Public Roads Type of Collision Maintained Roads (Washington State) Number of Percent of Number of Percent of Number of Percent of Crashes Crashes Crashes Crashes Crashes Crashes Number of Fatal Collisions 4 13.80% 696 23.80% 2,655 20.30% Number of Serious Injury Collisions 25 86.20% 2,232 76.20% 10,396 79.70% Number of Alcohol -Related Collisions 8 27.60% 591 20.20% 2,723 20.90% Total Number of Fatalities 4 729 2,863 Total Number of Collisions` 654 69,198 538,366 Total Number of Injuries" 245 30,100 212,646 'Includes fatal and non-fatal 'Includes serous and non -serous. The 2017 - 2021 WSDOT provided collision data was further evaluated to determine the predominant crash types, contributing factors, and specific locations. As shown in Table 2 below, the predominant causes of fatal and serious injury collisions in Kittitas County are "hitting a fixed object' and "overturning." Crashes involving fixed -object hazards, or non -traversable roadside slopes within clear zone accounted for 44.80% of all fatal and serious injury collisions. Additionally, 20.70% of the fatal and serious injury collisions were caused by vehicles overturning. Unprotected roadside slopes steeper than 311orizontallVertical are considered non -traversable and contribute to overturning accidents. The predominant conditions where fatal and serious injury collisions occurred included higher speed roadways with low lighting conditions, and where roadway curvature was a factor. This accident data seems consistent for a county like Kittitas where most of the roadway network is rural without lighting features. Accidents tend to be more severe when speeds are higher and where low light conditions hinder driver acuity, especially in horizontal curves where drivers are more likely to leave the roadway. Non -intersection related collisions accounted for 72.40% of the fatal and serious injury collisions, although a large proportion of total accidents (non- injury, serious injury, and fatal) occurred at intersections and main corridors leading to potential for more serious accidents at these locations. For the fatal and serious injury collisions accident report details please see Appendix A.