Lane guidance display method, and navigation device and recording medium for realizing the method

A navigation device for guiding a vehicle from a departure point to a destination or a stopover on a screen, said navigation device comprising:

• a map data storage part for storing map data including lane data, the lane data including a number of lanes and lane control of roads to be connected to an intersection;
• a route search part for searching for, based on the map data, a guidance route from the departure point to the destination or the stopover;
• a vehicle position detection part for detecting a vehicle position on the map data;
• a target intersection operation part for searching for and specifying, based on the guidance route and the map data, a target intersection for guidance on the guidance route;
• a recommended lane operation part for determining, based on the guidance route, the lane data, and the target intersection, a recommended enter lane and a recommended exit lane for the target intersection;
• a guidance part for generating, based on the recommended enter and exit lanes and the lane data, lane guidance data required for display on the screen;
• and
• an output part for displaying guidance for the vehicle on the screen according to the lane guidance data.

A computer program embodied on a computer readable medium for use with a computer for guiding, on a screen, a vehicle on which lane to take to go through an intersection, said computer program comprising:

• computer readable program code operable to search for a guidance route from a departure point to a destination or a stopover based on map data including lane data, the lane data including a number of lanes and lane control of roads to be connected to the intersection;
• computer readable program code operable to specify a target intersection for guidance located on the guidance route;
• computer readable program code operable to determine, based on the guidance route and the lane data, a recommended enter lane for entering the target intersection and a recommended exit lane for exiting the target intersection;
• computer readable program code operable to generate an intersection image of the target intersection for lane guidance;
• computer readable program code operable to generate a running path for the target intersection which passes through both the recommended enter lane and the recommended exit lane;
• and
• computer readable program code operable to display, on the screen, a lane guidance intersection image which is a combination of the intersection image and the running path.