A processor is coupled to a vehicle, the processor being configured to store a lane change parameter. A feature sensor detects a feature of a passenger in the vehicle. The processor is programmed to control the vehicle to execute an assisted lane change based on the lane change parameter, the lane change parameter defining a characteristic of the assisted lane change, communicate with the feature sensor to detect the feature of the passenger during the assisted lane change, determine whether the passenger was comfortable during the assisted lane change based on the detected feature of the passenger, and modify the lane change parameter upon determining that the passenger was uncomfortable.