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Collision Trends <br />* https://wtsc.wa.gov/dashboards/fatalities-dashboard/ accessed May 2025. <br />Kittitas County & King County <br />Traffic fatalities and serious injuries on all roads in Kittitas County and King County have risen over the 10-year period <br />from 2014 to 2023, highlighting a growing safety concern, as illustrated in Figure 11 and Figure 12.* <br />Snoqualmie Pass <br />Collision data from 2014 to 2023 was <br />analyzed for local roads, SR 906, and the on- <br />and off-ramps of I-90 within the Snoqualmie <br />Pass area. Over this 10-year period, a total of <br />107 collisions were reported. <br />Of these, one collision was fatal and two resulted in <br />life-altering serious injuries (Figure 13). In addition to <br />vehicle-only collisions, there were also collisions involving <br />pedestrians, bicyclists, and motorcyclists, also referred to as <br />vulnerable road users (Figure 14 and Figure 15). A significant <br />share of collisions—81 of the 107 (76%)—occurred on SR 906 <br />or the I-90 ramps. All three KSI collisions were vehicle-only <br />and took place on SR 906 or I-90 ramps (Figure 16). <br />2014 2015 2016 2017 2018 2019 2020 2021 2022 20232014 2015 2016 2017 2018 2019 2020 2021 2022 2023 <br />28 <br />32 <br />31 <br />38 <br />32 <br />29 <br />34 <br />31 <br />41 40 <br />551 597 635 646 <br />609 <br />657 634 <br />763 <br />854 <br />924 <br />Figure 11. KSI Collisions by Year in Kittitas County (2014 - 2023) <br />Source: Washington State Traffic Safety Commission Crash Data, 2014-2023. <br />Figure 12. KSI Collisions by Year in King County (2014 - 2023) <br />Source: Washington State Traffic Safety Commission Crash Data, 2014-2023. <br />Figure 13. Collisions by Year & Injury Type <br />in Snoqualmie Pass (2014 - 2023) <br />Source: Fehr & Peers, 2025. <br />Figure 14. Collisions by Road User <br />Type in Snoqualmie Pass (2014 - 2023) <br />Source: Fehr & Peers, 2025. <br />2014 2015 2016 2017 2018 2019 2020 2021 2022 2023 <br />10 <br />3 <br />8 4 9 10 5 11 8 4 8 <br />1 <br />3 <br />2 <br />4 <br />3 <br />1 <br />3 <br />3 <br />41 <br />1 <br />1 <br />Killed or Serious <br />Injury (KSI) Collisions <br />Suspected Minor Injury <br />or Possible Injury Collisions <br />Property Damage <br />Only (PDO) Collisions <br />Road User <br />Type <br />6% <br />Vehicle-only <br />Collisions <br />Vulnerable Road <br />User Collisions <br />94% <br />30Kittitas County | Snoqualmie Pass Comprehensive Safety Plan