Regulation information analysis system

A regulation information analysis system that determines a traffic regulation which may be imposed on a target intersection or road by analyzing probe information sent from a plurality of vehicles and stored in a database, the regulation information analysis system comprising:

• a probe information storing unit configured to store the probe information including travelling paths of the plurality of vehicles;
• a road network data storing unit configured to store road network data including intersections and roads expressed by nodes and links, respectively;
• a traffic regulation determination unit configured to read, from the probe information storing unit, a first number of traveling paths of vehicles passing through the target intersection or road, and to statistically detect existence of a traffic regulation possibly imposed on the target intersection or road, based on a number or ratio of the traveling paths of vehicles passing through the target intersection or road via a target route among the first number of traveling paths;
• and
• an avoidance factor determination unit configured to read, from the road network data storing unit, the road network data for a specific area including the target intersection or road for which the existence of the traffic regulation is detected, and to determine if a configuration of the nodes and links associated with the target intersection or road satisfies a predetermined avoidance condition which provides an avoidance factor for the vehicles to avoid taking the target route through the target intersection or road,
• wherein the traffic regulation determination unit is further configured to read, from the probe information storing unit, a second number of traveling paths of vehicles passing through the target intersection or road if the avoidance factor is found by the avoidance factor determination unit for the target intersection or road, and to further determine if the traffic regulation exists on the target intersection or road with an enhanced statistical accuracy using the second number of traveling paths, the second number being greater than the first number.