| 摘要 |
PROBLEM TO BE SOLVED: To provide a "navigation device and computer program" for correctly guiding the latest situation of a parking lot of an expressway-accessory service facility ahead of a direction of travel on the expressway.SOLUTION: The center coordinates of a parking lot included in parking lot information received by a radio-wave beacon while driving an expressway are registered as a parking lot record in correlation with a road link nearest the center coordinates among road links in an advance direction that matches a direction of travel on the expressway now travelling. When parking lot information is received by an FM multiplex broadcast while travelling on the expressway, determination is made as to whether a road link of parking lot hand code in which center coordinates matching the center coordinates of the parking lot information are registered is the road link in travelling direction matching the travelling direction on the expressway now travelling and, if so, a congestion state of the parking lot included in the parking lot information is presented to a user. |
