Laserfiche WebLink
Table 1. Types of collisions, number of crashes and percent of crashes for Kittitas County, all counties -county maintained roads, <br />and all public roads. <br />Type of Collision <br />Kitthas County <br />AM Counties -Co. <br />Maintained Roads <br />Ali Public Roads <br />(Washington State) <br />Number of Percent of <br />Crashes Crashes <br />Number of Percent of <br />Crashes Crashes <br />Number of Percent of <br />Crashes Crashes <br />Number of Fatal Collisions <br />4 <br />13.80% <br />696 <br />23.80% <br />2,655 <br />20.30% <br />Number of Serious Injury Collisions <br />25 <br />86.20% <br />2,232 <br />76.20% <br />10,396 <br />79.70% <br />Number of Alcohol -Related Collisions <br />8 <br />27.60% <br />591 <br />20.2061. <br />2,723 <br />20.90% <br />Total Number of Fatalities <br />4 <br />729 <br />2,863 <br />Total Number of Collisions* <br />654 <br />69,198 <br />8,366 <br />Total Number of Injuries" <br />245 <br />30,100 <br />E212,646 <br />'includes fatal and non-fatal <br />"Includes serious and non -serious. <br />The 2017 - 2021 WSDOT provided collision data was further evaluated to determine the predominant crash types, <br />contributing factors, and specific locations. As shown in Table 2 below, the predominant causes of fatal and serious <br />injury collisions in Kittitas County are °hitting a fixed object" and 'overturning! Crashes involving fixed -object hazards, <br />or non -traversable roadside slopes within clear zone accounted for 44.80% of all fatal and serious injury collisions. <br />Additionally, 20.70% of the fatal and serious injury collisions were caused by vehicles overtuming. Unprotected <br />roadside slopes steeper than 3Horizontal:1Vertical are considered non -traversable and contribute to overturning <br />accidents. The predominant conditions where fatal and serious injury collisions occurred included higher speed <br />roadways with low lighting conditions, and where roadway curvature was a factor. This accident data seems <br />consistent for a county like Kittitas where most of the roadway network is rural without lighting features. <br />Accidents tend to be more severe when speeds are higher and where low light conditions hinder driver acuity, <br />especially in horizontal curves where drivers are more likely to leave the roadway. Non -intersection related collisions <br />accounted for 72.40% of the fatal and serious injury collisions, although a large proportion of total accidents (non- <br />injury, serious injury, and fatal) occurred at intersections and main corridors leading to potential for more serious <br />accidents at these locations. For the fatal and serious injury collisions accident report details please see Appendix A. <br />M <br />