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<br />Marian Meadows Rezone and Subdivision Final Environmental Impact Statement 3-62 <br />How much collision data should be <br />studied? <br />One industry-accepted practice for <br />collision data analysis is to study <br />the last 3 complete and consecutive <br />years. Collision data older than the <br />last 3 years may be associated with <br />out-of-date roadway configurations <br />and/or travel patterns and can make <br />recent trends in the causes of <br />collisions less apparent. Studying <br />less than 3 years of data may not <br />provide an accurate depiction of the <br />collision history. <br />9 What are the existing level of service conditions? <br />Seven intersections were studied to evaluate how well the local transportation system operates. These <br />intersections represent the key locations where the project’s effects would be most noticeable. <br />One of these intersections is at Turtle Town located off Sparks Road that includes a gas station, <br />restaurant, convenience store, and RV park. This area is not accessed by a specific roadway intersection; <br />rather, turns into and out of the area are made along a stretch of undelineated parking areas. For the <br />purposes of this study, all vehicles turning into and out of the Turtle Town area are analyzed as an <br />intersection. <br />The PM peak hour LOS analysis was conducted for these seven intersections in the study area to <br />determine existing operating conditions. Results are summarized in Table 3-5. Existing 2008 PM peak <br />hour volumes are shown in Figure 3-9. <br />As shown in Table 3-5 all of the study intersections currently operate acceptably above the LOS C <br />standard. <br />Table 3-5. Existing 2008 PM Peak Hour LOS Summary <br /> LOS <br />Delay <br />(sec/veh) <br />I-90 Eastbound/Railroad Street A 9.3 <br />I-90 Westbound/Railroad Street A 8.8 <br />Sparks Road/Railroad Street A 9.2 <br />Sparks Road/Turtle Town A 8.7 <br />Sparks Road/Pit Way A 9.1 <br />Sparks Road/Country Drive A 8.4 <br /> <br />10 Are there currently high numbers of collisions or hazardous roadway conditions in <br />the area? <br />Collisions can occur as a result of a variety of reasons and at any <br />location. By studying the frequency, types, severity, and other <br />characteristics of collisions, trends may appear to help identify <br />ways to reduce the potential for collisions and increase safety. <br />Collision data were provided by Kittitas County and analyzed <br />for the study area for the last 3 consecutive and complete years <br />of data (2005 to 2007). Between 2005 and 2007, one collision <br />occurred at the Railroad Street/Sparks Road intersection, and <br />two collisions occurred along Sparks Road near the Turtle Town <br />area. The small number of collisions suggests that traffic safety