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Key Data Trends <br />The development of the CSAP was guided by comprehensive <br />data analysis, including collision data, traffic volumes, traffic <br />speed, and intersection level of service. <br />This chapter highlights the key findings and trends identified through these <br />analyses, offering insights into current roadway conditions and their implications for <br />transportation safety and mobility in Snoqualmie Pass. <br />To identify key collision trends, the project team analyzed collisions that occurred in <br />Snoqualmie Pass over a 10-year period, from January 2014 through December 2023, <br />using data available through the WSDOT crash portal.* The analysis includes collisions <br />on local roads, SR 906, and the on- and off-ramps of I-90, but excludes I-90 itself, as <br />this limited-access highway is addressed under the State’s Strategic Highway Safety <br />Plan.† <br />In addition to collision data, traffic volume and speed data was evaluated to assess <br />roadway performance and understand how capacity constraints may impact safety <br />across the local network. <br />What is a Fatal or Serious Injury (KSI) Collision?‡ <br />A fatal injury is any injury that leads to death within 30 days of the <br />motor vehicle collision in which it occurred. A serious injury is a non- <br />fatal injury that results in one or more of the following: <br />* The collision data used in the preparation of this plan were provided by WSDOT <br />and only includes collisions that were logged with a crash report. <br />† https://targetzero.com/ <br />‡ https://highways.dot.gov/media/20131 <br /> ƒSevere laceration resulting in exposure <br />of underlying tissues/muscle/organs <br />or resulting in significant loss of blood <br /> ƒBroken or distorted <br />extremity (arm or leg) <br /> ƒSuspected skull, chest, or <br />abdominal injury other than <br />bruises or minor lacerations <br /> ƒSignificant burns (second and <br />third degree burns over 10% <br />or more of the body) <br /> ƒUnconsciousness when taken <br />from the crash scene <br /> ƒCrush injuries <br /> ƒParalysis <br />29 Snoqualmie Pass Comprehensive Safety Plan | Kittitas County