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

Multimodal Packagesminute limit was set because there is a marginal benefit for headways under 15 minutes onthose routes that do not already have that quality of service. In the CLRP+, the highdemand routes in the corridor are already coded with headways less than 15 minutes.This package also included enhanced U.S. 50 bus service with new routes from Tysons andFair Oaks continuing on U.S. 50 into the D.C. Core and added a shoulder lane on U.S. 50 forbus operations only.The package also included new and enhanced Priority Bus services with 10-minute peakperiod frequency on I-66, U.S. 29, and U.S. 50 with 10-minute service frequency, whichrepresents an enhancement to I-66 Transit/TDM Study service levels.AnalysisFor Package 4 the total VMT in the study area is lower that the CLRP+ and all other packages,due to the extensive transit services being provided in this package. The proportion of congestedVMT decreases slightly when compared to the CLRP+. The total PMT in the study areais very similar to the CLRP+. There is a decrease in rail PMT, but an increase in the arterialPMT due to the improvement in bus service on the arterials. At the Potomac River cutline,there is a slight increase over all packages for the total transit person throughput.This package shows the highest mode shares for commuter transit trips, although the increasein mode share is less than one percent for work trips.Figure 3.34 and Figure 3.35 show the increase in VMT by level of service and the increase inPMT as compared to the CLRP+. Figure 3.36 shows the improved travel time for the selectedorigin and destination pairs. This package was transit-based and hence the majority of traveltime improvements were for transit modes.3-50 I-66 Multimodal Study