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SANTAANA VISION ZERO PLAN <br />Purpose <br />This map illustrates the Santa Ana road segments with moderately -high <br />to high injuries involving pedestrians, bicyclists, and vehicles. These <br />corridors have the highest collision rates and injury severities collision <br />rates and injury severities. This map can be used as a variety of pur- <br />poses, such as determining high collision, high injury areas to prioritze <br />improvements as well as where to reduce speed limits. <br />Methodology <br />The methodology for this analysis involved joining each collision to the <br />nearest street segment to quantify the number of collisions and severi- <br />ty of injuries that have occurred at different locations along a road seg- <br />ment. Each injury was given a `score' as noted in the list below. Each <br />road segment's score was then summed together for a total score per <br />segment. The total score was divided by the length of the street seg- <br />ment to get a decimal number that can be used to rank each segment <br />relative to all other street segments and identify highest to lowest rela- <br />tive ranking of collisions and injury severity. This final decimal number <br />was multiplied by the feet in one quarter mile to get a larger whole <br />number for facilitation. The final rank on road segments varied from <br />a minimum `score' of less than one per quarter mile to a maximum of <br />660 per quarter mile where multiple collisions with pedestrian or bike <br />injuries have occured, often times at busy intersections. The ranks for <br />each segment was then symbolized in GIS as quartile groups for this <br />map. The highest ranking road segments are shown in thick purple <br />lines and the lowest ranking are shown in thin light blue lines. A second <br />overlay of collision points, circles and crossed lines show where the <br />actual collisions have occurred. <br />Description <br />Pedestrian Fatalities or Severe Injuries <br />Score <br />1.5 <br />Bicycle Fatalities or Severe Injuries <br />1.5 <br />All Other Pedestrian and Bicycle Collisions <br />1.25 <br />Vehile Collisions Resulting in Fatalities or Serious Injuries <br />1.25 <br />All Other Vehicle Collisions <br />1.0 <br />Appendix B <br />