With respect to the impact of AVs on personal vehicles, 54% of experts believe that AVs will increase overall vehicle use, namely by reducing travel and parking costs and by providing a mobility option to those who are too young or too old to drive. Of these, most (81%) indicated that such an increase should be limited, which could be most effectively accomplished by promoting car sharing and increasing vehicle usage costs. Thirty percent believe that AV use will decrease overall vehicle use due to the fact that autonomous cars will be more efficient at completing the tasks that drivers usually perform, as well as the fact that riders are likely to engage in more car-sharing in the future.