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<br />The largest number of crashes occurred at the intersection of School Street and Jackson Avenue. <br />Both roadways are four-lane undivided segments entering this signalized intersection. Crashes at <br />this location were 2.5 times higher than the average for a typical signalized intersection and 1.5 <br />times higher than the critical rate, which indicates a definitive safety deficiency at this intersection. <br />As illustrated in Figure 4, this number of left turn crashes was significantly higher than the average <br />at signalized intersections. Most left turn crashes occurred when a vehicle turned left in front of <br />an opposing vehicle in the far lane. This indicates poor judgment in gap selection and driver <br />expectations due to the four-lane undivided design. <br /> <br />Figure 4 <br />Crash Type at School Street and Jackson Avenue <br /> <br />100 <br />~ 80 <br />~ 60 <br />~ 40 <br />"- <br />rf. 20 <br />o <br /> <br /> <br /> <br />y , y, ,~ <br />, '" n '~, " ' '~ <br /> <br />Rear End <br /> <br />Right Angle <br /> <br />Left Turn <br /> <br />Other <br /> <br />Type of Crash <br /> <br />o Average Signalized Intersection <br />II School Street and Jackson Avenue <br /> <br />Crashes at the intersection of School Street and Elk River High School also were above critical <br />levels. Incidents at this location were 4.6 times higher than the average for a thru/stop <br />intersection and 2.3 times higher than the critical rate. As illustrated in Figure 5, most crashes <br />were rear end crashes. In addition, over 250/0 of these rear end crashes involved more than two <br />vehicles. This indicates motorists are not expecting vehicles to stop along School Street. <br /> <br />Figure 5 <br />Crash Type at School Street and Elk River High School <br /> <br />100 <br /> <br />Q) 80 <br />0) <br />19 60 <br />c: <br />~ 40 <br />I- <br />Q) <br />c... 20 <br /> <br />o <br /> <br /> <br />Rear End Right Angle Left Turn Sideswipe Other <br /> <br />Type of Crash <br /> <br />o Average Thru/Stop Intersection <br />II School Street and ERHS <br /> <br />Elk River High School has made several improvements in the past two years to aid in the <br />improvement of traffic operations surrounding the school. By limiting student access to one <br />location, motorists are queued in the parking lot rather than in the roadway network. This method <br />results in less confusion and conflict on the public roadway. <br /> <br />Howard R. Green Company <br />Elk River High School Safety Study <br />O:\PROJ\814360j\Memo.doc <br /> <br />- 6- <br />