Transcription of Chapter 13 Trip Generation - ICPSR
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Chapter 13 Trip Generation - ICPSR
13 trip GenerationBackgroundIn this Chapter , the theory and mechanics of the trip Generation stage will beexplained. trip Generation is a model of the number of trips that originate and end in eachzone for a given jurisdiction. Given a set of N destination zones and M origin zones (whichinclude all the destination zones and, possibly, zones from adjacent jurisdictions), separatemodels are produced of the number of crimes originating and ending in each of these zones. That is, a separate model is produced of the number of crimes originating in each of the Morigin zones, and another model is produced of the number of crimes ending in each of theN destination zones. The first is a crime production model while the second is a crimeattraction model. Two points should be emphasized.
The trip generation model being implemented in this version of CrimeStat is an aggregate model. Thus, the predictors are aggregate, rather than behavioral, in nature, as discussed in cha pter 11. They are correlates of trips, not n ecessarily the reasons for the trips. For example, typically population is the best predictor of trips.
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