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

Multimodal Packagesnew bus service included in this package, which was designed to feed the rail stations, resultedin an increase of rail person throughput at the cutlines as compared to the CLRP+ Baseline.There was no substantial change in commuter mode share, although there was a slight shiftfrom HOV 3+ to SOV and HOV 2. Although capacity was added for SOV, the commuter modeshare for transit remained relatively constant. This was a result of the added transit service andthe fact that parking cost and congestion in the Washington, D.C. core remained the same as inthe CLRP+ Baseline. This disutility or cost for SOV travel provides an incentive for commutersto use transit for trips into the core.Figure 3.11 and 3.12 show the increase in the peak period VMT by level of service and theincrease in PMT as compared to the CLRP+ Baseline.Figure 3.13 shows the travel time saving by mode for the selected origin and destination pairs.Package 1 results in a slight improvement in transit travel time over the CLRP+ Baseline. Thisis a result of the added transit service. There also is an improvement in SOV and HOV 2 traveltime as a result of allowing these modes to use I-66. In the CLRP+ Baseline scenario, the facilityis limited to only HOV 3+. It is has a very high LOS and correspondingly very little demand.In this package I-66 is tolled at a rate that allows for LOS C/D conditions. This slight impact onthese facilities results in an increase in travel time for HOV 3+. The addition of SOV andHOV 2 vehicles does not adversely impact the speeds along I-66 but as noted does impact thearterial access and egress points.Figure 3.11 Package 1 Peak Periods VMT by Level of ServiceI-66 Multimodal Study 3-23