Driving support device, driving support method, and program

A drive support apparatus that is mounted on a subject vehicle, the apparatus comprising:

• an imager that captures a side peripheral image of the subject vehicle;
• a vehicle detector that detects other vehicles in the captured side peripheral image;
• a distance detector that detects distances between the subject vehicle and the other vehicles;
• a subject vehicle length information storage that stores an entire length of the subject vehicle as subject vehicle length information;
• a superimposed image generator that calculates a distance of a subject vehicle length unit based on the subject vehicle length information stored in the subject vehicle length information storage and the distances from the subject vehicle to the other vehicles detected by the distance detector, and generates a superimposed image based on the calculated distance;
• a display image generator that synthesizes the superimposed image generated by the superimposed image generator on the captured side peripheral image, and generates a display image;
• and
• a display in the subject vehicle and displays the display image generated by the display image generator,
• wherein the superimposed image generator generates the superimposed image including a concatenation of frames configured with a line segment parallel to a width direction of a road and a line segment parallel to a road direction, and
• the superimposed image generator makes each of the frames have a length along the road direction corresponding to the entire length of the subject vehicle on the basis of the subject vehicle length information.