Abstract:The emerging shared mobility services, such as e-hailing services provided by Uber, Lyft, Didi, Grab, and Ola or rideshare services enabled by SCOOP, WAZE, Zipcar, and Turo provide more travel mode choices for commuters in both morning and evening commutes. For example, a person can combine a rideshare service in the morning, but use an e-hailing service for the evening return trip to reduce the pairing cost, and provide more flexibility in evening trips There is a clear need to not only understand the nature and effect of these new shared mobility transportation services better, but also to understand, model, and study the interactions between the various modes of transportation, and integrate them in a unified transportation planning model that includes both morning and evening commute trips.

Key words: E-hailing, carpooling, ridesharing, vehicle miles traveled