Driving assistance system

A driving assistance system comprising:

• a human-machine interface (HMI) including at least one of a touch screen, a display, a microphone, or a speaker, for providing information to a driver of a vehicle;
• a surrounding information acquiring device including at least one of a camera, a milliwave radar, LIDAR (laser imaging detection and ranging) or sonar, for acquiring information on surroundings of the vehicle;
• at least one electronic control unit (ECU) provided with a processor programmed to:
• calculate a target path of the vehicle based on the information on the surroundings;
• control the vehicle to move along the target path;
• calculate a driving path of a preceding vehicle running in the same lane as the vehicle based on the information on the surroundings;
• calculate a difference between the target path and the driving path;
• and
• issue an alarm to the driver through the HMI, wherein
• the at least one ECU is further programmed to issue the alarm to prompt the driver to pay attention or prompt the driver to perform at least one of steering and braking of the vehicle if the difference between the target path and the driving path is equal to or larger than a predetermined value.