Foursquare ITP developed baseline conditions and future transit service and transportation demand management (TDM) program needs on the I-66 corridor, as part of Transform 66 Outside the Beltway Multimodal Solutions. The baseline includes the road network, local bus, commuter bus, heavy rail, commuter rail, carpooling, vanpooling, slugging, and Park and Ride lot facilities in the I‐66 corridor for opening year (2022), 2030 and 2045, as well as population and employment estimates and travel pattern analysis. These conditions include a needs assessment that will be used to inform transit and TDM recommendations along the I-66 corridor for implementation in 2022 and beyond.