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TRAFFIC INFORMATION GENERATION METHOD, TRAFFIC INFORMATION GENERATION DEVICE, AND NAVIGATION SYSTEM

  • US 20100138141A1
  • Filed: 08/22/2008
  • Published: 06/03/2010
  • Est. Priority Date: 08/22/2007
  • Status: Active Grant
First Claim
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1. A traffic information generation method for generating traffic information for each link, the method comprising:

  • a vehicle speed detection step of detecting a vehicle speed at predetermined distance intervals or at predetermined time intervals using a vehicle speed sensor; and

    a traffic jam degree detection step of referring to a specified speed and a specified distance prescribed in association with a traffic jam degree representing a level of a traffic jam and a connection determination distance prescribed in accordance with a road type to detect the traffic jam degree corresponding to the vehicle speed;

    wherein,when a link length falls within a predetermined range, information on the traffic jam degree corresponding to a fastest vehicle speed within a prescribed starting point distance from a beginning of the link is allocated to the link.

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