Vehicle Platform, Autonomous Driving System, and Vehicle Control Interface Box

A VCIB interfaces between an autonomous driving kit (ADK) and a vehicle platform (VP). The VP includes as vehicle modes, a manual mode in which the VP is under the control by a driver and an autonomous mode in which the VP is under the control by the ADK. When a first condition is satisfied in the manual mode, the VCIB has the vehicle mode make transition from the manual mode to the autonomous mode. The first condition includes (1) a condition that the VCIB has authenticated the ADK, (2) a condition that a power mode status signal indicates “drive mode,” (3) a condition that a readiness-for-autonomization signal indicates “Ready for Autonomous Mode,” and (4) a condition that a vehicle mode request indicates “Request for Autonomy.”