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<br />V. Analysis of Alternatives <br /> <br />Crash Ana]ysis <br /> <br />Standard crash rates from the Traffic Safety Fundamentals Handbook, dated April 200], <br />published by MnlDOT were used for a crash analysis. Since the existing interchange <br />configuration is proposed to be modified, the existing crash rate was not determined for each <br />intersection. The purpose of the crash analysis is to proyide a comparison of the projected <br />crashes per year that are anticipated for each intersection control type. Tab]es I, 2 and 3 provide <br />a summary ofthe crash analysis results. For details of the crash analysis, see Appendix C. <br /> <br />Table 1 <br />Crash Analysis ResuRs <br /> <br />CSAH 1411.35E Northbound Ramns <br /> Intersection Intersection Mn/DOT Projected Projected <br />Altemative ADT ADT Average Crash cra:~e~ear CrasheslYear <br /> 12008\ 12030\ Rate' 2008 12030\ <br />Side-street Stop Control 0.4 5 8 <br />All-way Stop Conlrol 0.6 7 12 <br />Traffic Signal Conlrol 27,530 52,520 0.7 8 <br /> 14 <br />Roundabout Conlrot ~ 0.35 4 7 <br /> <br />, Based on Mn/DOT average crash rate for Iype of intersection and control. <br />.. Assumed to reduce the number of crashes by 50% when compared 10 traffic signal control. <br /> <br />Tabte 2 <br />Crash Analysis Resulls <br /> <br />CSAH 1411.35E Southbound Ram's <br /> Interseelion Intersection Mn/DOT Projecled Projected <br />Allemative ADT ADT Average Crash CrasheslYear Cra:lhe~ear <br /> 12008\ (2030) Rate' 120081 2030 <br />Side-street Stop Control 0.4 3 7 <br />AII-way Stop Control 06 4 10 <br />17,205 43,050 <br />Traffic Signal Control 0.7 5 11 <br />Roundaboul Control ~ 0.35 3 6 <br /> <br />, Based on Mn/DOr average crash rate for type of Intersection and control. <br />.. Assumed 10 reduce Ihe number of crashes by 50% when compared to traffic signal control. <br /> <br />Table 3 <br />Crash Analysis ResuRs <br />CSAH 14/21~ Avenue <br /> <br /> Intersection Intersection MnlDOT Projected Projected <br />Alternative ADT ADT Average Crash CrasheslYear CrasheslYear <br /> 12008\ 120301 Rate ' /20081 120301 <br />Side-street Stop Control 0.4 2 7 <br />All-way Stop Control 0.6 3 10 <br />12,085 41,500 <br />Traffic Signal Conlrol 0.7 4 11 <br />Roundabout Control ~ 0.35 2 6 <br /> <br />, Based on MnlDOr average crash rate for type of intersection and control. <br />~ Assumed to reduce the number of crashes by 50% when compared 10 traffic signal control. <br />Resu]ts of the crash analysis indicate that roundabout control and side-street stop control are <br />anticipated to have the lowest number of crashes in year 2030 whereas all-way stop control and <br />traffic signal control are anticipated to have the highest. As previously noted, the crash analysis <br /> <br />~CONS\.:lTlNG Gaoup, INC. <br /> <br />- 8 - <br /> <br />January 30, 2009 <br /> <br />25 <br />