Control device, control method, and vehicle

A control device for controlling a vehicle, the vehicle including a vehicle speed sensor, an engine and an engine stop-restart system configured to stop idling of the engine, the engine stop-restart system comprising an electronic control unit, the engine, a starter motor and a battery, the control device including a central processing unit (CPU) and a memory and being configured to:

• identify a section from start to stop of the vehicle using a vehicle speed detected by the vehicle speed sensor, wherein the section from start to stop of the vehicle is a section having a low stability road surface, and the low stability road surface comprises at least one road surface of a rock road, a V-groove road, a grooved ground, a slope or rubble slope road, a mogul road, a sandy place, a steep slope or a stepped road,
• count a number of times the vehicle enters a low-speed section, the low-speed section being the identified section where a representative value of the vehicle speed is less than a prescribed speed, wherein the prescribed speed is 35 km/h,
• determine that the vehicle is in a specific situation where low-speed travel is inevitable only in response to determining that the number of times the low-speed section is entered exceeds a prescribed number of times, wherein the prescribed number of times is one, and
• prohibit an operation of the engine stop-restart system so as to prohibit stopping the engine in response to determining that the vehicle is in the specific situation.