MAP INFORMATION SYSTEM

A map information system includes a database management device that manages a map database used for driving support control of a vehicle. The map database includes traffic signal map information that indicates a position of a traffic signal. The traffic signal map information is associated with an evaluation value indicating certainty of the traffic signal map information for each traffic signal. The database management device recognizes a signal indication of the traffic signal at a verification position, based on camera image information indicating an image around the vehicle. The database management device recognizes behavior of the vehicle with respect to the verification position, based on vehicle state information and vehicle position information. Then, the database management device sets the evaluation value regarding the traffic signal at the verification position according to whether or not the behavior of the vehicle is consistent with the signal indication.