Traveling control device, traveling control method, and non-transitory recording medium

A traveling control method comprising:

• acquiring result of detection of a surrounding situation sensor detecting a surrounding situation of a host vehicle driving on the right side of a road, the surrounding situation including a following vehicle positioned within a certain distance behind the host vehicle;
• calculating a change in traveling behavior of the following vehicle in a time period before and after a time point when a right turn blinker of the host vehicle is turned on based on the result of detection;
• and
• predicting the traveling behavior of the following vehicle before the host vehicle turns right or while the host vehicle is turning right based on the change in the traveling behavior of the following vehicle in the time period before and after the time point when the right turn blinker of the host vehicle is turned on.

A non-transitory recording medium having recorded thereon a computer program for causing a processor to perform a process comprising:

• acquiring result of detection of a surrounding situation sensor detecting a surrounding situation of a host vehicle driving on the right side of a road, the surrounding situation including a following vehicle positioned within a certain distance behind the host vehicle;
• calculating a change in traveling behavior of the following vehicle in a time period before and after a time point when a right turn blinker of the host vehicle is turned on based on the result of detection;
• and
• predicting the traveling behavior of the following vehicle before the host vehicle turns right or while the host vehicle is turning right based on the change in the traveling behavior of the following vehicle in the time period before and after the time point when the right turn blinker of the host vehicle is turned on.