Control device and control method for restart of speed control of a vehicle

A control device for a vehicle, the control device comprising:

• a memory storing instructions, when executed by a processor, cause the processor to:
• provide a speed control function for automatically controlling a speed of the vehicle,
• interrupt an operation of the speed control function in response to a braking operation element of the vehicle being operated by a driver during the operation of the speed control function;
• when the driver stops the vehicle while the operation of the speed control function is interrupted, provide a restart proposal to the driver to restart the operation of the speed control function in a case where a proposal condition is satisfied, and cease to provide the restart proposal in a case where the proposal condition is not satisfied;
• and
• when the driver agrees with the restart proposal, restart the operation of the speed control function and keep the vehicle stopped by the speed control function, wherein
• the agreement with the restart proposal is made by the driver terminating an operation of the braking operation element, and
• the proposal condition includes a turn indicator of the vehicle is not operated during the stop transition period and one or more of the following conditions:
• an operation level of a driving operation element of the vehicle during a stop transition period until the driver stops the vehicle after the operation of the speed control function is interrupted is equal to or lower than a threshold value;
• an operation level of the braking operation element during the stop transition period is equal to or lower than a threshold value;
• and
• an operation level of a steering operation element of the vehicle during the stop transition period is equal to or lower than a threshold value.