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

Multimodal Packages CLRP+ improvements (CLRP projects for 2040 and recommendations from the I-66Transit/TDM Study);Option D, Integrated Corridor Management;Option H, Transportation Demand Management; andOption I, Bicycle/Pedestrian System Enhancements, with specific system and/or transitaccess project(s) as appropriate.Multimodal Packages DeterminationAs a result of the workshop, four multimodal packages were assembled to address specificcapacity needs and congestion issues in the corridor as shown in Table 3.2. Two mobilityoptions were not carried forward to the packages: Option E – Arterial Capacity Enhancementand Option F – Metrorail Level of Service and Capacity.Based on input from the PARC and various stakeholders, Option E was seen as being particularlydifficult to implement at the scale proposed, although elements of Option E were carriedforward into other packages.With regard to Option F, previous and already planned investment in the Metrorail Orangeand Silver Lines has resulted in a high-capacity transit service in the corridor and study area.Option F was initially conceived as a means of enhancing the Metrorail service in the corridorand/or increasing Metrorail ridership. However, initial forecasting results and subsequent discussionswith WMATA revealed that, while interline connections might provide improved servicefor some transit markets; they would not increase the total capacity of the Orange Line, butwould rather substitute some rail trips for others. In fact, WMATA indicated that significantinfrastructure improvements would be needed inside and/or adjacent to the study area to providemore capacity for Metrorail in this corridor. As indicated elsewhere in this report, provisionof 100 percent eight-car trains at the headways assumed in this study represents themaximum Metrorail capacity that can be achieved without major infrastructure enhancements,such as an additional Metrorail Potomac River crossing.I-66 Multimodal Study 3-3