Abstract: The safe operation assistance device 200 includes: a connecting destination detecting section 259 that detects and manages a connection state between the safe operation assistance device 200 and a connecting destination device; a unique information setting section 251 that sets unique information identifying a vehicle type of an own vehicle according to the connecting destination device; a positional information acquisition section 257 that acquires positional information of the own vehicle; an own vehicle information management section 252 that manages the positional information and the unique information of the own vehicle; an inter-vehicle communication section 255 that transmits the own vehicle information to other vehicle and acquires other vehicle information; and a risk determination section 254 that determines presence or absence of a collision risk between the own vehicle and the other vehicle using the own vehicle information and the other vehicle information.

Abstract: A safe driving assistance device includes a region setting section that sets a collision risk determination region used for determining presence or absence of a collision risk of a host vehicle, and a determination section that determines a collision risk between the host vehicle and another vehicle using a host vehicle collision risk determination region, another vehicle collision risk determination region, and environment data. The host vehicle collision risk determination region of the host vehicle is set based on travel data of the host vehicle, a vehicle specification of the host vehicle, and the environment data obtained by the host vehicle. The other vehicle collision risk determination region is obtained by a vehicle-to-vehicle communication device. The other vehicle collision risk determination region is the collision risk determination region of the other vehicle as a collision risk determination target with the host vehicle set by the other vehicle.

Abstract: Onboard terminal device includes its own vehicle information acquisition section, a vehicle-to-vehicle communication section, and a collision risk determination section. The vehicle information acquisition section acquires the vehicle information including position information of an own vehicle. The vehicle-to-vehicle communication section performs wireless communications with another vehicle to communicate one's vehicle information to another vehicle and to receive the another vehicle's information, which includes position information of the another vehicle, from the another vehicle. The collision risk determination section determines a risk of collision between the one vehicle and the another vehicle by using a predetermined determination algorithm.

Abstract: A safe driving assistance device includes a region setting section that sets a collision risk determination region used for determining presence or absence of a collision risk of a host vehicle, and a determination section that determines a collision risk between the host vehicle and another vehicle using a host vehicle collision risk determination region, another vehicle collision risk determination region, and environment data. The host vehicle collision risk determination region of the host vehicle is set based on travel data of the host vehicle, a vehicle specification of the host vehicle, and the environment data obtained by the host vehicle. The other vehicle collision risk determination region is obtained by a vehicle-to-vehicle communication device. The other vehicle collision risk determination region is the collision risk determination region of the other vehicle as a collision risk determination target with the host vehicle set by the other vehicle.

Abstract: An on-board terminal device includes a location measuring section that measures a location of an own vehicle, a wireless communication section that transmits own vehicle information including location information of the own vehicle to other vehicles and receives other vehicle information including location information of the other vehicles from the other vehicles by execution of wireless communication with the other vehicles, and a monitoring section that estimates the location of the other vehicles and calculates a relative distance between the own vehicle and the other vehicles when the wireless communication has been interrupted, and executes an alarm process for preventing collision of the own vehicle and the other vehicles when the relative distance is less than a predetermined threshold.

Abstract: The safe operation assistance device 200 includes: a connecting destination detecting section 259 that detects and manages a connection state between the safe operation assistance device 200 and a connecting destination device; a unique information setting section 251 that sets unique information identifying a vehicle type of an own vehicle according to the connecting destination device; a positional information acquisition section 257 that acquires positional information of the own vehicle; an own vehicle information management section 252 that manages the positional information and the unique information of the own vehicle; an inter-vehicle communication section 255 that transmits the own vehicle information to other vehicle and acquires other vehicle information; and a risk determination section 254 that determines presence or absence of a collision risk between the own vehicle and the other vehicle using the own vehicle information and the other vehicle information.

Abstract: Onboard terminal device includes its own vehicle information acquisition section, a vehicle-to-vehicle communication section, and a collision risk determination section. The vehicle information acquisition section acquires the vehicle information including position information of an own vehicle. The vehicle-to-vehicle communication section performs wireless communications with another vehicle to communicate one's vehicle information to another vehicle and to receive the another vehicle's information, which includes position information of the another vehicle, from the another vehicle. The collision risk determination section determines a risk of collision between the one vehicle and the another vehicle by using a predetermined determination algorithm.

Abstract: An on-board terminal device includes a location measuring section that measures a location of an own vehicle, a wireless communication section that transmits own vehicle information including location information of the own vehicle to other vehicles and receives other vehicle information including location information of the other vehicles from the other vehicles by execution of wireless communication with the other vehicles, and a monitoring section that estimates the location of the other vehicles and calculates a relative distance between the own vehicle and the other vehicles when the wireless communication has been interrupted, and executes an alarm process for preventing collision of the own vehicle and the other vehicles when the relative distance is less than a predetermined threshold.