Driving assistance device, driving assistance method, and program

1. A driving assistance device comprising:

a memory storing computer program instructions; and

a processor configured to:

acquire hazardous event data for notifying the occurrence of a hazardous event indicating a hazardous driving during driving from a driving situation sensing device provided in a vehicle;

acquire a deterioration degree of a traveling environment registered in advance in association with a position where the driving situation sensing device senses the hazardous event data; and

determine, on a basis of the hazardous event and the deterioration degree of the traveling environment, whether a hazardous event indicated by the hazardous event data was caused by a driving operation of the driver of the vehicle or the traveling environment,

wherein the processor is further configured to determine, on a basis of a correspondence relation between a hazard type/degree indicated by the hazardous event data and the deterioration degree of the traveling environment, which is different for each deterioration type of the traveling environment, whether the hazardous event indicated by the hazardous event data was caused by the driving operation of the driver of the vehicle or the traveling environment.

2. The driving assistance device according to claim 1 , wherein the deterioration degree of the traveling environment includes the deterioration degree of a road surface on which the vehicle is traveling.

3. The driving assistance device according to claim 1 , wherein the deterioration degree of the traveling environment includes the deterioration degree of a travel regulation device provided on the road surface on which the vehicle is traveling.

4. A driving assistance method comprising the steps of:

acquiring hazardous event data for notifying the occurrence of a hazardous event indicating a hazardous driving during driving from a driving situation sensing device provided in a vehicle;

acquiring a deterioration degree and a deterioration type of a traveling environment registered in advance in association with a position where the driving situation sensing device senses; and

determining, on a basis of the hazardous event and the deterioration degree of the traveling environment, whether a hazardous event indicated by the hazardous event data was caused by a driving operation of the driver of the vehicle or the traveling environment,

wherein the determining comprises determining, on a basis of a correspondence relation between a hazard type/degree indicated by the hazardous event data and the deterioration degree of the traveling environment, which is different for each deterioration type of the traveling environment, whether the hazardous event indicated by the hazardous event data was caused by the driving operation of the driver of the vehicle or the traveling environment.

5. A non-transitory computer-readable recording medium storing a program that causes a computer of a driving assistance device to perform processes, the processes comprising:

acquiring hazardous event data for notifying the occurrence of a hazardous event during driving from a driving situation sensing device provided in a vehicle;

acquiring a deterioration degree and a deterioration type of a traveling environment registered in advance in association with a position where the driving situation sensing device senses the hazardous event data; and

determining, on a basis of the hazardous event and the deterioration degree of the traveling environment, whether a hazardous event indicated by the hazardous event data was caused by a driving operation of the driver of the vehicle or the traveling environment,

wherein the determining comprises determining, on a basis of a correspondence relation between a type or a hazard type/degree indicated by the hazardous event data and the deterioration degree of the traveling environment, which is different for each deterioration type of the traveling environment, whether the hazardous event indicated by the hazardous event data was caused by the driving operation of the driver of the vehicle or the traveling environment.

6. The driving assistance device according to claim 1 , wherein the hazardous event indicates that the amount of change in the state of the vehicle is equal to or greater than a predetermined threshold value.

7. The driving assistance device according to claim 1 , wherein the processor is further configured to:

determine, on the basis of the hazard type indicated by the hazardous event data and the deterioration degree of the traveling environment, whether the hazardous event indicated by the hazardous event data was caused by the driving operation of the driver of the vehicle or the traveling environment.