Vehicle Travel Control Method and Travel Control Device

A system trigger mode and a driver trigger mode are provided. In the system trigger mode, when a start condition for an automated lane change function of performing a lane change of a vehicle by autonomous travel control is satisfied, lane change information as to whether or not to accept execution of the automated lane change function is presented, and when an acceptance input of accepting the execution of the automated lane change function is detected in response to presentation of the lane change information, the automated lane change function is executed. In the driver trigger mode, the automated lane change function is executed when a lane change instruction operation different from the acceptance input is performed. When the lane change instruction operation is performed after the presentation of the lane change information, the automated lane change function by the driver trigger mode is executed.