Map information system

A map information system comprising:

• one or more processors configured to manage a map database used for driving support control that supports driving of a vehicle, wherein
• the map database includes road marking map information that indicates a position of a specific road marking including at least one of a stop line and a pedestrian crossing,
• driving environment information indicates driving environment for the vehicle that is acquired by a sensor installed on the vehicle,
• the one or more processors are further configured to:
• detect a road marking candidate being a candidate for the specific road marking around the vehicle, based on the driving environment information;
• recognize vehicle behavior of at least one of the vehicle and another vehicle in a period when passing the road marking candidate, based on the driving environment information;
• determine, based on the vehicle behavior, an evaluation value that indicates certainty of the road marking candidate being the specific road marking;
• and
• register the road marking candidate having the evaluation value equal to or higher than a threshold, as the specific road marking, in the road marking map information,
• the specific road marking includes the pedestrian crossing,
• the pedestrian crossing has a stripe pattern that a plurality of lines orthogonal to a first direction are arranged in parallel,
• the road marking candidate includes a pedestrian crossing candidate which is a candidate for the pedestrian crossing,
• a pedestrian crossing evaluation value is an evaluation value that indicates certainty of the pedestrian crossing candidate being the pedestrian crossing,
• and
• the one or more processors are further configured to:
• recognize a trajectory of the vehicle or the other vehicle passing the pedestrian crossing candidate as the vehicle behavior, based on the driving environment information;
• and
• increase the pedestrian crossing evaluation value as an angle between the first direction of the pedestrian crossing candidate and the trajectory of the vehicle is closer to 90 degrees.