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CHAPTER 3: EXISTING CONDITIONS IN THE STUDYAREA <br />3.1 Safety <br />Table 3-1 Collision Types along 1-90 in the <br />Study Area, 2018 through 2023 <br />The safety discussion includes information <br />regarding collisions along 1-90, as well as <br />%of <br />Collision Type Crashes <br />surrounding County roads. In addition, common <br />Total <br />emergency and evacuation routes are also <br />Barrier/Median 131 17% <br />discussed, including typical responders. <br />........................................••••..••.•..........•..............•• <br />Struck Animal 119 16% <br />3.1.1 Existing Crash <br />............................................................................. <br />Object/Road Debris 57 8% <br />Assessment............................................................................. <br />Overturned 40 5% <br />An assessment of existing crash history <br />..Vehicle <br />............................... <br />was performed to determine overall trends/ <br />Rear End 180 24% <br />deficiencies on the 1-90 corridor in the study <br />...........................""""""o ................................... <br />Side-swi a 86 11/° <br />area. The existing safety assessment of the <br />1-90 corridor is focused on both eastbound <br />Snow/Earth Bank 44 6% <br />and westbound travel lanes between Easton <br />""""""""""""'...""."""".........."'............ <br />Over Embankment/ <br />and Cie Elum. The Washington Department <br />30 4/a <br />Ditch <br />of Transportation (WSDOT) provided existing <br />crash history data on this portion of 1-90 and <br />Other* 69 9% <br />local roads in the study area for the most <br />Total 756 100% <br />recent complete six years (2018 through 2023). <br />The existing crash data is summarized in the <br />Source: WSDOT, January 30, 2024 <br />following sections. <br />*Note: "Other" collision types include, but are not limited to: fire <br />started in vehicle; jackknife trailer; vehicle struck pedestrian; one <br />parked - one moving; and from same direction - all others <br />1-90 Crash History <br />Existing data includes 756 crashes that <br />Table 3-2 Collisions byInjury Severity along <br />occurred on the I-90 mainline between <br />I-90 in the Study Area, 2018 through 2023 <br />mileposts (MP) 70 and 85 during the six -year <br />period. This averages a total of 126 crashes per <br />Injury Severity Crashes % of <br />year or roughly one every three days. <br />Total <br />As shown in Table 3-1, the most common <br />Fatal 8 1% <br />collision types on this section of 1-90 include <br />Serious Injury 12 2% <br />rear -ends (24%), a vehicle hitting a barrier or <br />..........................................................................••. <br />median (17%), and a vehicle hitting an animal <br />Minor Injury 73 10% <br />(predominantly deer and elk; 16%). <br />............................................................................. <br />possible Injury 97 13% <br />............................................................................. <br />As illustrated in Table 3-2, 74 percent of all <br />crashes that occurred on this portion of 1-90 <br />during the six -year period were property - <br />damage -only crashes. There were eight <br />fatalities and twelve serious injury crashes <br />over the six -year period. <br />Property Damage <br />558 74% <br />Only (PDO) <br />........................................................................... <br />Unknown 8 1% <br />Total 756 100% <br />Source: WSDOT, January 30, 2024 <br />VOLUME I: FEASIBILITY REPORT 1-90 Corridor — Easton to Cle Elunn Feasibility Study 1 29 <br />