Vehicle platform and method for controlling vehicle platform

A method for controlling a vehicle platform to and from which an autonomous driving kit that gives an instruction for autonomous driving is attachable and detachable, the vehicle platform being configured to be capable of autonomous driving,

• the vehicle platform including:
• a base vehicle;
• a first vehicle speed specifying function unit and a second vehicle speed specifying function unit each specifying a vehicle speed of the base vehicle;
• a first vehicle fixing function unit and a second vehicle fixing function unit each carrying out fixation control for fixing the base vehicle;
• a first vehicle control interface box that relays control communication of the autonomous driving kit with the first vehicle speed specifying function unit and the first vehicle fixing function unit via a first path;
• and
• a second vehicle control interface box that relays control communication of the autonomous driving kit with the second vehicle speed specifying function unit and the second vehicle fixing function unit via a second path,
• the method comprising:
• at the time of occurrence of a one-system failure that makes communication or control via the first path or the second path impossible, carrying out, by each of the first vehicle control interface box and the second vehicle control interface box, limp home traveling control including deceleration in accordance with an instruction from the autonomous driving kit;
• at the time of occurrence of a two-system failure that makes communication or control via the first path and the second path impossible,
• in a case where the vehicle speed can be obtained from one of the first vehicle speed specifying function unit and the second vehicle speed specifying function unit, carrying out, by an activatable one of the first vehicle fixing function unit and the second vehicle fixing function unit, the fixation control, when the vehicle speed becomes zero;
• and
• in a case where the vehicle speed cannot be obtained from any of the first vehicle speed specifying function unit and the second vehicle speed specifying function unit, carrying out, by the activatable one of the first vehicle fixing function unit and the second vehicle fixing function unit, the fixation control after a lapse of a first prescribed time period from a time-counting start moment, when the vehicle speed immediately before the occurrence of the two-system failure is less than a prescribed value, and carrying out, by the activatable one of the first vehicle fixing function unit and the second vehicle fixing function unit, the fixation control after a lapse of a second prescribed time period from the time-counting start moment, when the vehicle speed immediately before the occurrence of the two-system failure exceeds the prescribed value, the second prescribed time period being longer than the first prescribed time period.