Travel assistance device, and travel assistance method for travel assistance device

A travel assistance device comprising:

• an information processing section configured to process information of sensor data obtained by a sensor;
• and
• a vehicle control section configured to perform travel assistance of a vehicle with use of the information processed by the information processing section,
• wherein the information processing section includes:
• a region extraction section configured to extract a specific region containing a traffic participant around an own vehicle, from the information of the sensor data;
• a risk derivation section configured to derive a risk degree of the traffic participant of the extracted specific region in view of safe travel of the own vehicle;
• a priority setting section configured to set a processing priority of the specific region depending on the risk degree;
• a processing-load setting section configured to set a processing load of information of the traffic participant of the specific region depending on the processing priority;
• and
• a recognition processing section configured to perform recognition of the traffic participant, based on information of the processing load from the processing-load setting section.