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

Mobility OptionsTotal VMT in the study area decreases;The proportion of congested VMT in the study area increases in both the morning andevening peak periods, although the total number of congested VMT decreases;As shown in Figure 2.7, total PMT in the study area decreases as people chose routes outsideof the study area;PMT shifts from freeways (I-66) to arterials as shown;There is no substantial change in the commute mode share, although the HOV 2 mode doesincrease slightly; andPerson throughput decreases at all of the cutlines as people shift to routes outside of thestudy area.Figure 2.7Daily PMT – Option AAdditional observations about this mobility option are noted below.Stakeholder interviews show mixed support for modification of the HOV restrictions.Existing transit demand is very high in the study area, which may not help supportexpanded HOV restrictions on I-66 because people maybe be unwilling to switch modes toHOV.Although of potential interest, changing the specific hours of the I-66 HOV restrictions canonly be tested using an operational analysis tool. The regional travel demand model onlycalculates trips for four daily time periods and cannot adequately analyze small changes inoperating hours or the volumes during the shoulder hours on either side of the peakperiods.2-16 I-66 Multimodal Study