TRAFFIC CONGESTION DEGREE DETERMINATION DEVICE, TRAFFIC CONGESTION INFORMATION NOTIFICATION DEVICE AND PROGRAM

摘要

PPROBLEM TO BE SOLVED: To accurately determine a traffic congestion degree in a side of acquiring information indicating the traffic congestion degree, even under the environment where the information indicating the relatively inaccurate traffic congestion degree is provided. PSOLUTION: The traffic congestion degree is determined based on a difference between an average vehicular speed and a speed limit (S70), when the average speed corresponding to a traffic congestion generated road section exists (S50:YES), and when the speed limit data corresponding to the traffic congestion generated road section exists in a map data (S60:YES). The traffic congestion degree is determined based on the average vehicular speed (S80), when the average speed corresponding to the traffic congestion generated road section exists (S50:YES), but when no speed limit data corresponding to the traffic congestion generated road section exists in the map data (S60:NO). A traffic congestion classification in the received traffic information is determined as the traffic congestion degree (S90), when no information indicating the average speed corresponding to the traffic congestion generated road section exists (S50:NO). PCOPYRIGHT: (C)2008,JPO&INPIT