Abstract: A vehicle system is provided that has an unoccupied control vehicle with no onboard driver. The control vehicle has a first propulsion system that can propel the control vehicle along a route, and optionally to stop or slow the control vehicle. One or more onboard power sources that can generate, store or both generate and store energy for powering at least the first propulsion system. A controller having one or more processors can autonomously control the propulsion system to move the control vehicle along one or more routes, and to interface with and couple to a driver-operable vehicle that has a second propulsion system. The controller can obtain control over the second propulsion system when the control vehicle is interfaced and coupled with the driver-operable vehicle.