I-66 Multimodal Study Final Report - Virginia Department of ...

Mobility OptionsMeasures of EffectivenessThe regional travel demand forecasting model was used in the process outlined above todevelop a set of performance measures or measures of effectiveness (MOE) for each of theoptions. The measures help assess how well the mobility options address issues and needs.The following measures of effectiveness were produced to assess the options.Vehicle Miles of Travel (VMT) – VMT quantifies the amount of travel by vehicles in thestudy area. Nonmotorized travel is not included in this measure. VMT was calculated inthe study area during the morning and evening peak periods and divided into threecategories based on congestion levels: uncongested, near capacity, and over capacity (basedon volume to capacity ratios). Preferred are mobility options that reduce congested VMT inthe study area, both in quantity and percentage.Person Miles of Travel (PMT) – PMT quantifies the amount of travel by people in thestudy area, and does include travel on transit, although nonmotorized travel is still notincluded. Daily PMT was calculated for three facility types in the study area: rail, freeways,and arterials. The PMT numbers for freeways and arterials include travel by buspassengers on those facilities as well as automobile drivers and passengers. Preferred areoptions that increase PMT in the study area, especially options in which the PMT increasesmore than the VMT. This indicates a mobility option which has a higher use of transit andother shared ride modes.Non-SOV Mode Share – Daily mode share was calculated for home-based work (HBW)trips starting or ending in the study area. Preferred are mobility options that increase theshare of non-SOV travel (Transit, HOV 2, and HOV 3+) in the study area.Person Throughput – This measure was evaluated at four cutlines along the corridor,shown in Figure 2.3. Person throughput is calculated as the number of people crossing acutline by rail, bus, or auto daily, in either direction. Preferred are mobility options thatincrease person throughput regardless of mode.These measures were used to inform which options best address the mobility and congestiongoals of the study. The measures are calculated and compared to the CLRP+ Baseline scenario,which includes the 2011 CLRP and transit and TDM improvements from the I-66 Transit/TDMStudy.I-66 Multimodal Study 2-11