TRAFFIC INFORMATION CREATING METHOD, TRAFFIC INFORMATION CREATING DEVICE, DISPLAY, NAVIGATION SYSTEM, AND ELECTRONIC CONTROL UNIT

摘要

A traffic information creating method creates traffic information on a road where a vehicle (2) is travelling. The method includes: a vehicle speed detection step (S1) for detecting a vehicle speed at a predetermined distance interval or a predetermined time interval by a vehicle speed sensor (11); and a congestion degree detection step (S1-3) for referencing a predetermined speed, a predetermined distance number, and a connection judgment distance number correlated to a congestion degree indicating the degree of congestion so as to detect the congestion degree based on the vehicle speed.