Aisin Aw Co., Ltd.

Toyota Jidosha Kabushiki Kaisha

Denso Corporation

Toshio Inoguchi

Tomoyuki Zaitsu

Kenji Nagase

Kazutaka Yoshikawa

Kazunori Watanabe

Teruhide Hayashida

Shinji Kachi

Tsuyoshi Iwata

Shinichi Yamada

Takahisa Ozaki

Takayasu Nakada

Yasuhiro Tooyama

Masamiki Andoh

An on-vehicle information providing device for providing information to a driver based on information sent from an information providing center is disclosed. When a vehicle leaves an off-street facility having multiple exits to enter a road, the on-vehicle information providing device performs a first process of sending the information providing center vehicle-side information including information obtained based on starting time and exiting time of the vehicle and information identifying one of the exits selected for the vehicle to leave the facility; and performs a second process of receiving from the information providing center exit status information including exit time lengths calculated for the respective exits by the information providing center based on the vehicle-side information received from multiple vehicles and providing information to the driver based on the received exit status information.

On-vehicle information providing device, information providing center, and information providing system

Conventionally, different traffic information cannot be sent in accordance with an output reason of a request to send. According to the present invention, a request to send traffic information, which is output in response to an instruction given by a user operation or an automatically given instruction, is acquired, an output reason of the request to send is determined, and a communication unit is controlled so that the traffic information on different areas is sent depending on the cases where the output reason is the instruction given by the user operation or the automatically given instruction.

Traffic information management device, traffic information management method, and traffic information management program

An embodiment provides a traffic information generating method for generating traffic information about a road on which a vehicle travels. A vehicle speed is detected by a vehicle speed sensor at predetermined distance or time intervals. By referring to a prescribed speed, a prescribed distance, and a link determination distance, a congestion degree associated with the vehicle speed is detected.

Traffic information generating method, traffic information generating apparatus, display, navigation system, and electronic control unit

When a vehicle passes through an intersection that is stored in a collection target intersection database and for which direction-specific probe information is collected, a CPU of a navigation device generates a plurality of direction-specific probe information (entry link, exit link, section travel time, and the like) from a plurality of unit distance section information that is collected within a direction-specific traffic information acquisition section until the vehicle passes through the intersection, an entry link traveled before entering the intersection; and an exit link traveled after passing through the intersection, and transmits these to an information distribution center.

Navigation devices, methods, and progrmas

A navigation device divides a pathfinding range into plural areas and performs pathfinding in consideration of congestion information. The navigation device includes a forecast congestion information generating unit configured to generate forecast congestion information corresponding to a predetermined time based on traffic information; and a forecast congestion information applying unit configured to apply, to each of the areas, the forecast congestion information corresponding to a time when a vehicle arrives in each of the areas. The navigation device includes an area setting unit configured to set regions divided by concentric circles centering around a present location, as the plural areas. The radius of the concentric circles is incremented by a fixed length that is set beforehand for each region or each time zone.

Navigation device that performs pathfinding in consideration of congestion information in plural areas using average speed in the plural areas

In a case where a CPUprovided in an information distribution centerhas received a request command for requesting predicted traffic information transmitted from a navigation apparatusas well as vehicle information such as a navigator identifying ID, coordinate data of a vehicle position, or coordinate data of a destination, the CPUsearches a basic route based on update-purpose map informationA, and sets a distribution range serving as a transmission target of traffic informationA,B, andC. Then, the CPUgenerates the predicted traffic informationC such as congestion prediction information corresponding to the distribution range, extracts the predicted traffic informationC of each link having a difference in the generated predicted traffic informationC and the current traffic informationA, and distributes the extracted predicted traffic informationC to the navigation apparatustogether with a link ID of a corresponding link.

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Nagoya, Japan

Toshio Inoguchi