  Shared mobility can provide access to transportation on a custom basis
without vehicle ownership. The advent of connected and automated vehicle
technologies can further enhance the potential benefits of shared mobility
systems. Although the implications of a system with shared autonomous vehicles
have been investigated, the research reported in the literature has exhibited
contradictory outcomes. In this paper, we present a summary of the research
efforts in shared autonomous vehicle systems that have been reported in the
literature to date and discuss potential future research directions.
