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TABLE 1 <br />2011 through 2015 Collision Comparison <br />Kittitas County <br />All Counties -Co. <br />All Public Roads <br />Maintained Roads <br />Collision Type <br /># <br />% of <br /># <br />% of <br />% of <br />Crashes <br />Crashes <br />Crashes <br />Crashes <br /># Crashes <br />Crashes <br />Fatal <br />5 <br />19.2% <br />632 <br />0.234 <br />2,188 <br />19.9% <br />Serious Injuries <br />21 <br />80.8% <br />2,067 <br />0.766 <br />8,813 <br />80.1% <br />Alcohol -Related <br />10 <br />38.5% <br />838 <br />0.31 <br />2,684 <br />24.4% <br />Total # Fatalities <br />5 <br />679 <br />2,378 <br />Total # All Injuries <br />224 <br />32,265 <br />230,395 <br />Total # All Collisions <br />656 <br />--- <br />67,137 <br />--- <br />523,186 <br />The 2011-2015 WSDOT provided collision data was further evaluated to determine the predominant <br />crash types and contributing factors. As shown in Table 2 below, the predominant causes of fatal and <br />serious injury collisions in Kittitas County are "hitting a fixed object" and "overturning." Crashes <br />involving fixed -object hazards, or non -traversable roadside slopes within clear zone accounted for 53.8% <br />of all fatal and serious injury collisions. Additionally 26.9% of the fatal and serious injury collisions were <br />caused by vehicles overturning. Unprotected roadside slopes steeper than 3HAV are considered non - <br />traversable and contribute to overturning accidents. The predominate conditions where fatal and <br />serious injury collisions occurred included higher speed roadways with less than desirable lighting <br />conditions and where roadway curvature was a factor. This accident data seems consistent for a county <br />like Kittitas where the majority 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 <br />acuity, especially in horizontal curves where drivers are more likely to leave the roadway. Non - <br />intersection related collisions accounted for 65.4% of the fatal and serious injury collisions, which is also <br />consistent with the amount of roadway lane miles versus intersections existing within the Kittitas <br />County roadway network. For the fatal and serious injury collisions accident report details please see <br />Appendix A. <br />