Driving support apparatus for tow coupling

An on-vehicle device configured to be mounted in a vehicle, the vehicle including a first coupler provided at a rear section of the vehicle and configured to be coupled with a second coupler of a tow-target vehicle, a camera configured to capture first images of an area behind the vehicle, and a display configured to display second images that are based on the first images, wherein the on-vehicle device comprises:

• at least one node configured to be coupled to the camera;
• and
• at least one node configured to be coupled to the display,
• wherein the on-vehicle device is configured when mounted in the vehicle to display the second images on the display, the second images including:
• a coupler image corresponding to the first coupler,
• first indicia indicative of a predicted trajectory of the vehicle moving backward, the first indicia including a first trajectory line extending along a first imaginary line from the rear section of the vehicle in a backward direction and a second trajectory line different from the first trajectory line and extending along a second imaginary line from the rear section of the vehicle in the backward direction, and
• second indicia indicative of a predicted trajectory of the first coupler, at least a portion of the second indicia being placed between the first trajectory line and the second trajectory line of the first indicia, and wherein the first indicia and the second indicia are adjusted in accordance with a steering turning angle of the vehicle.