Summary CPMs and CMFs can be used to develop a 'Safety Model' that allows for the explicit quantification of safety performance CPMs and CMFs can be used to develop a 'Safety Model' that allows for the explicit quantification of safety performance –CPM estimates the 'normal' safety performance –CMF estimates how each design feature affects safety Safety modeling considers the specific design features of a facility to estimate the collision frequency Safety modeling considers the specific design features of a facility to estimate the collision frequency Results can be converted into collision costs and combined with other evaluation criteria to assess and justify highway improvement expenditure.
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