The purpose of FHWAs Freight BenefitCost Study. We recommend however that, prior to rollingout the model for widespread use, FHWA conduct an acceptancetesting process in two corridors. FAF provides these data for For timeseries rate data, rates from rate bureau were used. 8 We recognize that posted rates do not reflect discounts that are negotiated with large customers. Fixed Effects to improve reliability and robustness of estimated relationships Trucking Demand as function of Delay per Mile and number of other control variables.

That is, the methodology adopted allows for the quantification of the effects of highway performance on the demand for highwayfreight transport. Basically, we are looking for shippers responses to changes in highway performance. Similarly, for trucking rates, labor and fuel costs are major drivers, and these variables had to be brought into the analysis. Specific and measurable acceptance testing criteria would relate to the functionality and efficiency of the model in two corridors Evaluation against the acceptance testing criteria Refinement of the model and Rollout.

In mathematical sense, the results come in the form of parameters that give specificity to the equations we are analyzing. GDP in these costs had fallen to less than percent of GDP by the turn of the century. We do this with statistical analysis. On the Measurement and Valuation of Travel Time Variability Due to Incidents on Freeways. Journal of Transportation Statistics. This factor would be percentage increase by which the benefit estimate from model such as HERS or StratBencost would be increased to reflect the full benefit from an improvement in highway freight movement.

If the coefficients tell us that, after accounting for all other relevant factors, firms buy more highway freight movement when trucking rates rise and congestion gets worse, then we know we have not succeeded in isolating the effects of transportation system improvements in relation to highway spending alternatives should be markedup appropriately given the results of this study and of possible later phases that will be designed to further strengthen this empirical work. That measure is described in the Appendix to this report and was also used in the statistical analysis as proxy for highway performance.