Lane guidance display system, method, and program

A lane guidance display method comprising:

• a forward image acquisition step of acquiring a forward image in which a scene ahead of a vehicle is captured;
• a travel lane specifying step of specifying a travel lane currently traveled by the vehicle;
• a target lane specifying step of in the case where the travel lane is branched into a plurality of branched lanes at a lane branch point ahead of the vehicle, specifying a target lane to be traveled by the vehicle after traveling past the lane branch point;
• and
• a display control step of causing a display section to display the forward image on which a first guide line is superimposed in the case where the travel lane is not branched into a plurality of branched lanes, the first guide line having, as an end point of the first guide line on a front side, a first front-side end point indicating a center position of the travel lane in a width direction, and
• causing the display section to display the forward image on which a second guide line is superimposed in the case where the travel lane is branched into a plurality of branched lanes, the second guide line having, as an end point of the second guide line on the front side, a second front-side end point indicating a position in the travel lane on a side of the target lane with respect to the center position of the travel lane in the width direction.

A non-transitory storage medium storing a computer-executable lane guidance display program causing a computer to execute:

• a forward image acquisition function of acquiring a forward image in which a scene ahead of a vehicle is captured;
• a travel lane specifying function of specifying a travel lane currently traveled by the vehicle;
• a target lane specifying function of in the case where the travel lane is branched into a plurality of branched lanes at a lane branch point ahead of the vehicle, specifying a target lane to be traveled by the vehicle after traveling past the lane branch point;
• and
• a display control function of causing a display section to display the forward image on which a first guide line is superimposed in the case where the travel lane is not branched into a plurality of branched lanes, the first guide line having, as an end point of the first guide line on a front side, a first front-side end point indicating a center position of the travel lane in a width direction, and
• causing the display section to display the forward image on which a second guide line is superimposed in the case where the travel lane is branched into a plurality of branched lanes, the second guide line having, as an end point of the second guide line on the front side, a second front-side end point indicating a position in the travel lane on a side of the target lane with respect to the center position of the travel lane in the width direction.