This module focuses on located crashes only and should be used when trying to obtain either a map of crashes or a listing of crashes with a specific geographic location. It can also be used in conjunction with the AdHoc module so that only crashes meeting specific criteria can be spatially viewed and/or listed and mapped.
Individuals using the mapping tool should understand that, because crash reports are incomplete or (missing location data, for example) inconsistent, approximately 20% of all reported crashes are not located and are not included on the maps. At a particular location, the percentage of crashes able to be located may be higher or lower than the overall geocoding rate. In addition, the location of a mapped crash may be an approximation rather than the exact point where a crash occurred. (This is particularly true near interchanges, rotaries or other hard to define locations).