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Due to the proXlITIlty of Har Mar and Rosedale malls, the holiday shopping period heavily impacts this intersection. It should be noted that this study was conducted during a time when tramc impacts due to holiday shopping were negligible. Historical accident data from January 1997 through December 1999 was gathered from the Roseville Police Department and Mn/DOT records, and was used to help determine when the observations should take place. Table I lists the road deficiencies related to these collisions. A collision diagram, shown in Figure 2, was completed to further familiarize the observers 'vith characteristics of the intersection. The collision diagram showed several patterns existing at the intersection.: . One of these patterns showed a significant amount of rcar end accidents occurring at both Snclling A vcnue approaches. . Another pattern was found along County Road B involving crossing and left turn type accidents. In addition, it was found that the majority of collisions occurred between the midday peak and afternoon peak hours with at least 12 collisions occurring in each hour. No noticeable patterns with respect to pavement conditions or season were evident. Based upon the traffic volume and accident data, the eight hours of required field observations were broken up into three periods 10 observe the intersections busiesl and most dangerous times. These periods included a weekday from II :00 a.m. to 2:00 p.m., a weekday from 4:00 p.m. to 6:00 p.m., and Saturday from II :00 a.m. to 2:00 p.m. Tables showing the volume and collision data with respect to time of day can be found in Appendix A. 2.3 Task 3 - Conflict Observations The intersection of Snelling A venue at County Road B was studied by trained observers during the three periods for a total of eight hours. II is SEH's opinion that equally effeclive observations could be completed by only one-hour of observation during each period. Conflicts were recorded as defined by the Traffic Conflict Procedure Manual, 2nd Edition (November 1996) prepared by Hamilton Associates for the Insurance Corporation of British Columbia. According to this manual, a conflict occurs when two road users approach the same point in :ime and space, anc: at Icast onc completes a successful evasive action to avoid a collision. Examples of evasive actions include swerving, severe braking, severe acceleration, and any combination thereof. A sample Conflict Observation Data Sheet can be found in Appendix A. Any deficiencies related to the observed Traffic Conflict Study Roseville, Minnesota A-ROSEV0001.00 Page 4