In-vehicle device, passing-through determination method, and recording medium

A device mounted on a vehicle, the device comprising:

• at least one memory;
• and
• at least one processor coupled to the at least one memory, the at least one processor being configured to:
• identify a driver;
• measure a height from a road surface of a road-to-be-traveled to an object over the road surface;
• acquire a height from a road surface of a road by the vehicle driven by the identified driver to an object over the road surface;
• determine whether a height of the road-to-be-traveled is lower than a height of a passable road;
• determine whether the narrow road has been passed through by the vehicle driven by the identified driver;
• count the number of times the narrow road has been passed through by an own vehicle driven by the identified driver;
• update an added height for the identified driver out of one or more added heights stored in an added height storage in such a way that the added height takes a value smaller than that before update based on at least the counted number of times;
• and
• in a case that the height of the road-to-be-traveled is determined to be lower than the height of a passable road, provide notification that the road to be traveled is impassable by the vehicle driven by the identified driver is.

A passing-through determination method comprising:

• identifying a driver;
• measuring a width of a road-to-be-traveled;
• acquiring a width of a road by a vehicle driven by the identified driver;
• determining whether the width of the road-to-be-traveled is narrower than the width of the passable road;
• determining whether the narrow road has been passed through by the vehicle driven by the identified driver;
• counting the number of times the narrow road has been passed through by the vehicle driven by the identified driver;
• updating an added width for a driver out of one or more added widths stored in a added width storage in such a way that the added width takes a value smaller than that before update based on at least the counted number of times;
• and
• in a case that the width of the road-to-be-traveled is determined to be narrower than the width of a road, providing notification that the road to be traveled is impassable by the vehicle driven by the identified driver.