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

Mobility OptionsIn the peak direction, all lanes are Bus/HOV 3+ during peak hours;In the reverse‐peak direction, all lanes are general purpose lanes during peak hours; andIn off‐peak periods all lanes are open to all traffic.Figure 2.14 I-66 Capacity Enhancement – Option C2In this mobility option, the widened I-66 profile will include three lanes total, except on theportion east of the split for the Dulles Connector Road. For this section, both the eastbound andwestbound segments will have three general purpose lanes and one auxiliary lane. The addedcapacity will decrease congestion on I-66 primarily in the reverse-peak direction, which willallow for some improved bus service due to increased bus speeds.Key FindingsBecause there are no restrictions in the reverse-peak direction with the added capacity, thisoption primarily eases congestion on I-66 in the reverse-peak direction. This new capacityshifts some traffic from surface arterials to the freeway. As with Option C1, the HOV 3+restriction in the peak direction limits use of the new capacity in that direction. Other findingsbased on the MOEs detailed in Table 2.3 include:As shown in Figure 2.15, the percentage of uncongested VMT increases in both the morningand evening peaks due to the new roadway capacity;As a result of the unrestricted capacity enhancements, more travelers use I-66 resulting inan increase in study area PMT as compared with the CLRP+ Baseline scenario;Mode share shows no change from the CLRP+ Baseline scenario; andAlmost all cutline volumes increase slightly over the CLRP+ Baseline scenarios due toincreased traffic in the study area.I-66 Multimodal Study 2-23