1999 Update of the Arizona Highway Cost Allocation Study
The purpose of this report was to update the Arizona highway cost allocation study and to evaluate the alternative of using the new Federal Highway Administration (FHWA) cost allocation model as a replacement. The update revealed that the repeal of Arizona's weight-distance tax has led to a decrease in the payments made by the largest vehicles. As a result, these vehicles are now projected to pay less than their full cost responsibility over the 1999 through 2003 program years. Meanwhile, lighter vehicles will continue to pay more than their full cost responsibility over this same time period. Efforts to use the new FHWA cost allocation model were thwarted by the requirement for data inputs that are not readily available. This data requirement argues against using this new model.
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THE ADOT HIGHWAY COST ALLOCATION MODEL
ADOT HIGHWAY COST ALLOCATION MODEL RESULTS
SIMPLIFIED METHODOLOGY FOR COST AND REVENUE ALLOCATION
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2003 program period ADOT HCAS model aggregate allocation by vehicle Arizona Highway arld assigned autos and pick-ups Average for Fiscal axle classiﬁed combination trucks commercial vehicles common costs conﬁguration Construction Program cost allocation model distribution Dollars in Millions equity ratios ESAL factors estimates Federal Model ﬁnal forecast period FORTRAN fuel efﬁciency fuel tax gasoline tax HCAS Table heavier vehicles heaviest weight class Highway Cost Allocation highway user revenues HURF lightest weight class mile of travel motor carrier fees Obligation Program overpayment Oversize Permits pavement percent period FY pick-ups/SUVs pound weight pounds print ﬁle Program expenditures projected proportion of VMT proportional representation reduced-fee reﬂect registered weight registration fees Revenue Allocation revenue-to-cost responsibility ratio Rural expenditures shown single unit trucks speciﬁc spreadsheet tax rates tire tax total cost responsibility trafﬁc unit and combination update urban vehicle and weight vehicle classes vehicle miles vehicle type vehicles weighing weight category weight-based