Abstract: When a host vehicle enters a roundabout, a travel route of the host vehicle is communicated by a direction indicator to other vehicles surroundings the host vehicle. A controller computes a travel route over which a host vehicle and executes driving assist control so that the host vehicle travels along the travel route. In this driving assist method, whether or not the host vehicle has arrived at a roundabout is assessed. When the host vehicle is assessed to have arrived at a roundabout, a positional relationship between a host vehicle entrance for the host vehicle and a host vehicle exit for the host vehicle in the roundabout is assessed based on the travel route. When the host vehicle enters the roundabout, control of the direction indicator lights is performed in accordance with the positional relationship that was assessed.

Abstract: A map information correction method for correcting map information includes information of a lane boundary line, the method further including: detecting a position with respect to an own vehicle of a lane boundary line set in place on a road surface around the own vehicle; estimating an own position on a map of the own vehicle; and correcting, depending on the estimated own position and the detected position of the lane boundary line, a position of the lane boundary line included in the map information by, in a first region comparatively close to the own vehicle, a larger rotational correction amount than in a second region comparatively far from the own vehicle and, in the second region, a larger translational correction amount than in the first region.

Abstract: A processor operates to: acquire first information regarding a surrounding travel environment including a travel lane in which a subject vehicle travels, on the basis of detection information from an onboard sensor; refer to map information stored in a storage device to acquire second information regarding lanes of a road; determine whether or not a travel road to which the travel lane belongs is a predetermined specific road, on the basis of the first information; and when a determination is made that the travel road is the specific road, composite the first information and the second information to generate travel environment information.

Abstract: A map information correction method for correcting map information includes information of a lane boundary line, the method further including: detecting a position with respect to an own vehicle of a lane boundary line set in place on a road surface around the own vehicle; estimating an own position on a map of the own vehicle; and correcting, depending on the estimated own position and the detected position of the lane boundary line, a position of the lane boundary line included in the map information by, in a first region comparatively close to the own vehicle, a larger rotational correction amount than in a second region comparatively far from the own vehicle and, in the second region, a larger translational correction amount than in the first region.

Abstract: A driving assist method minimizes an incidence of lane changing within a circulatory roadway. In this driving assist method, a recognition assessment processor assesses the travel of a host vehicle, calculates a travel route over which the host vehicle is to travel, and executes a driving assist control based on the travel route. The recognition assessment processor further assesses whether the host vehicle has arrived at a roundabout having a circulatory roadway to which three or more radial roadways are connected. When an assessment has been made that the host vehicle has arrived at the roundabout, a position of a host vehicle entrance and a position of a host vehicle exit are specified. Furthermore, an entrance position is set based on a positional relationship between the host vehicle entrance and the host vehicle exit.

Abstract: A method for controlling a vehicle including: based on map information including information of an installation position of a traffic light and information of a lane controlled by the traffic light and a range of the angle of view of a camera mounted on the own vehicle, calculating an imaging-enabled area in which an image of the traffic light can be captured on the lane by the camera; determining whether or not the own vehicle is positioned in the imaging-enabled area; and when the own vehicle is positioned in the imaging-enabled area, controlling the own vehicle in such a way that the traffic light is not shielded from the range of the angle of view of the camera by a preceding vehicle of the own vehicle.

Abstract: A map data storage method for acquiring map data content used in a subject vehicle and storing the map data content in a common database by using a controller is provided. This method includes converting a format of the acquired map data content to a predetermined format that can be used in the subject vehicle, storing the map data content converted into the predetermined format in the common database, acquiring update information regarding the map data content stored in the common database, and editing the map data content in the predetermined format stored in the common database on the basis of the acquired update information.

Abstract: A processor acquires first information regarding a surrounding travel environment including a travel lane of another vehicle via a communication device. The first information is based on detection information from sensors equipped in the other vehicle. The processor associates identification information of the lane with the acquired first information and accumulates the first information in a storage device. The processor refers to map information stored in the storage device to acquire second information regarding lanes of a road. The processor calculates a difference regarding a common lane between the first information and the second information and composites the first information and the second information on the basis of the difference to generate travel environment information.

Abstract: A pedestrian crosswalk through which a subject vehicle is expected to pass is specified as a target pedestrian crosswalk. Road configurations close to the target pedestrian crosswalk are detected. Traffic lines of moving objects crossing the target pedestrian crosswalk are estimated on the basis of the road configurations. An area including the estimated traffic lines is set as a detection area of a detector detecting objects around the subject vehicle. The moving objects are detected by the detector in the detection area. Travel of the subject vehicle is controlled on the basis of a detection result of the detector.

Abstract: When a host vehicle enters a roundabout, a travel route of the host vehicle is communicated by a direction indicator to other vehicles surroundings the host vehicle. A controller computes a travel route over which a host vehicle and executes driving assist control so that the host vehicle travels along the travel route. In this driving assist method, whether or not the host vehicle has arrived at a roundabout is assessed. When the host vehicle is assessed to have arrived at a roundabout, a positional relationship between a host vehicle entrance for the host vehicle and a host vehicle exit for the host vehicle in the roundabout is assessed based on the travel route. When the host vehicle enters the roundabout, control of the direction indicator lights is performed in accordance with the positional relationship that was assessed.

Abstract: A processor operates to: acquire first information regarding a surrounding travel environment including a travel lane in which a subject vehicle travels, on the basis of detection information from an onboard sensor; refer to map information stored in a storage device to acquire second information regarding lanes of a road; determine whether or not a travel road to which the travel lane belongs is a predetermined specific road, on the basis of the first information; and when a determination is made that the travel road is the specific road, composite the first information and the second information to generate travel environment information.

Abstract: When a host vehicle enters a roundabout, a controller computes a travel route over which a host vehicle and executes driving assist control so that the host vehicle travels along the travel route. In this driving assist method, an exiting illumination area, where a direction indicator light indicating that the host vehicle is to exit a roundabout is to be illuminated based on the travel route. While the host vehicle is traveling on the roundabout, an assessment is made as to whether or not the host vehicle has arrived at the illumination area. When the host vehicle is to exit the roundabout and the host vehicle is assessed to have arrived at the illumination area, control is performed to determine to illuminate the direction indicator light that indicates the host vehicle is to exit the roundabout.

Abstract: A driving assist method minimizes an incidence of lane changing within a circulatory roadway. In this driving assist method, a recognition assessment processor assesses the travel of a host vehicle, calculates a travel route over which the host vehicle is to travel, and executes a driving assist control based on the travel route. The recognition assessment processor further assesses whether the host vehicle has arrived at a roundabout having a circulatory roadway to which three or more radial roadways are connected. When an assessment has been made that the host vehicle has arrived at the roundabout, a position of a host vehicle entrance and a position of a host vehicle exit are specified. Furthermore, an entrance position is set based on a positional relationship between the host vehicle entrance and the host vehicle exit.

Abstract: A map data correcting method for correcting map data used in a vehicle using a controller includes executing a first correction process of uniformly offsetting the map data as a whole to reduce a first error that is a general position error of the map data and executing a second correction process of reducing a second error that is a position error still remaining in the map data even after uniformly offsetting the map data as a whole.

Abstract: A travel control method estimates a position of a moving object around a subject vehicle using a detector configured to detect the moving object. This method includes detecting a direction of travel in a lane from map information. The lane is located on a road on which the moving object travels. When the subject vehicle is changing directions, the position of the moving object is estimated on the basis of the direction of travel in the lane.

Abstract: A map data storage method for acquiring map data content used in a subject vehicle and storing the map data content in a common database by using a controller is provided. This method includes converting a format of the acquired map data content to a predetermined format that can be used in the subject vehicle, storing the map data content converted into the predetermined format in the common database, acquiring update information regarding the map data content stored in the common database, and editing the map data content in the predetermined format stored in the common database on the basis of the acquired update information.

Abstract: A driving assistance method includes extracting an interference traffic line that is a route along which another vehicle can move and that interferes with a planned travel route of a subject vehicle. The method also includes determining a necessary length of the extracted interference traffic line of the other vehicle, which length is necessary for determining a driving action of the subject vehicle, on the basis of at least one of a shape of a road, a traffic rule, and a traffic situation. The method further includes determining the driving action of the subject vehicle to respond to the other vehicle moving along the interference traffic line using a range of the determined necessary length of the interference traffic line as a determination object.

Abstract: A travel control for a vehicle includes specifying a pedestrian crosswalk through which a subject vehicle is expected to pass as a first pedestrian crosswalk, estimating a position on the first pedestrian crosswalk through which the subject vehicle passes as a crossing position in the length direction of the first pedestrian crosswalk, specifying another pedestrian crosswalk located within a predetermined distance from the crossing position and located close to the first pedestrian crosswalk as a second pedestrian crosswalk, setting an area including the first pedestrian crosswalk and the second pedestrian crosswalk as a detection area of a detector detecting an object around the subject vehicle, detecting a moving object in the detection area using the detector, and controlling travel of the subject vehicle on the basis of a detection result of the detector.

Abstract: A map data correcting method for correcting map data used in a vehicle using a controller includes executing a first correction process of uniformly offsetting the map data as a whole to reduce a first error that is a general position error of the map data and executing a second correction process of reducing a second error that is a position error still remaining in the map data even after uniformly offsetting the map data as a whole.

Abstract: The travel route calculation device includes a travel route calculation unit configured to calculate a travel route for a subject vehicle to arrive at a destination, a feature detection unit configured to detect a feature, and a distance measurement unit configured to measure a distance from the subject vehicle to the feature as a necessary recognition distance. The necessary recognition distance is necessary for the subject vehicle to recognize the feature when deciding an action of the subject vehicle. The travel route calculation device further includes a determination unit configured to determine difficulty in recognizing the feature, on the basis of a detection range of the feature detection unit and the necessary recognition distance. The travel route calculation unit calculates the travel route while avoiding a location at which recognition of the feature is determined to be difficult by the determination unit.