Abstract: Disclosed is a feature for a vehicle that enables taking precautionary actions in response to conditions on the road network around or ahead of the vehicle, in particular, an intersection without traffic signals and without a sufficient merge lane. A database that represents the road network is used to determine locations where roads meet without a traffic signal and without a sufficient merge lane. Then, precautionary action data is added to the database to indicate a location at which a precautionary action is to be taken about the location of the insufficient merge lane. A precautionary action system installed in a vehicle uses this database, or a database derived therefrom, in combination with a positioning system to determine when the vehicle is at a location that corresponds to the location of a precautionary action. When the vehicle is at such a location, a precautionary action is taken by a vehicle system as the vehicle is approaching a location of an insufficient merge lane.

Abstract: Provided are a device for automatically generating route restriction information of intersections between main roads and narrow streets, and a method therefor. With respect to a specific intersection which is an intersection between a main road and a narrow street, firstly, it is determined to prohibit a right turn and passing through the intersection. Under these conditions, when it is sufficiently confirmed, by using external information, that the right turn and passing through the intersection can be allowed at the specific intersection, the route restriction regarding the direction is released. Probe information and traffic restriction data are used for the external information.

Abstract: A geographic database used by a navigation system includes data regarding which corners of an intersection are connected by a crosswalk and the type of crosswalk. The geographic database also includes data regarding locations of crosswalks at a location other than an intersection. Using this information, the navigation system can provide crosswalk information to a pedestrian regarding where to cross a road.

Abstract: A control circuit of a navigation apparatus acquires exit port information in a rotary intersection for route guidance. It is determined whether a guidance point or guidance target used as an exit path from the rotary intersection is a learned road acquired by the road learning function. When the exit path is not a learned road, namely, when the exit path is an existing road in a ready-made map data, an “exit path guidance for existing roads” aimed at an exit port to an existing road is executed. In contrast, when the exit path from the rotary intersection is a learned road, an “exit path guidance for learned roads” aimed at an exit port to a learned road is executed.

Abstract: Disclosed is a feature for a vehicle that enables taking precautionary actions in response to conditions on the road network around or ahead of the vehicle, in particular, a blind intersection along a section of road. A database that represents the road network is used to determine locations where a blind intersection is located along a section of road. Then, precautionary action data is added to the database to indicate a location at which a precautionary action is to be taken about the blind intersection located along the section of road. A precautionary action system installed in a vehicle uses this database, or a database derived therefrom, in combination with a positioning system to determine when the vehicle is at a location that corresponds to the location of a precautionary action. When the vehicle is at such a location, a precautionary action is taken by a vehicle system as the vehicle is approaching a blind intersection.

Abstract: A method of providing intersection assistance with a portable electronic device to remind a user of traffic rules when the user approaches traffic intersections includes receiving an input from the user indicating a destination location for generating navigation instructions to the destination location, determining a current location of the portable electronic device according to received position signals, providing navigation instructions to the destination location according to the current location of the portable electronic device, and reminding the user of traffic rules related to intersections for a geographical location in which the portable electronic device is currently located when the portable electronic device detects that the portable electronic device is approaching an intersection, where reminding the user of traffic rules related to intersections comprises indicating a side of a second road the user should turn onto when making a turn from a first road onto the second road.

Abstract: A car navigation apparatus includes an intersection searching means 14 for searching for intersections in a vicinity of the current position of a vehicle from intersections which exist on a searched route and which exist between the current position and a destination, an intersection name outputting means 15 for outputting the names of the searched intersections, an intersection selecting means 17 for selecting an intersection from the intersection names outputted, an facility searching means 18 for searching for facilities which exist in a vicinity of the intersection selected through the map data, a facility name outputting means 19 for outputting the names of the searched facilities, a facility selecting means 20 for selecting a facility from the facility names outputted, and a facility information outputting means 21 for extracting facility information about the selected facility from the map data, and for outputting the facility information.

Abstract: A non-scaled, linearly compressed pictographic mapping system is provided for the visual display of information in a navigational aid. Unlike today's road maps which use a point-arc-polygon paradigm, the new mapping uses a non-scaled, linearly-compressed pictographic design that shows roads as linear pictograms. The display has a columnar layout, whereby the descriptive elements are grouped together by type, and displayed one above the other in columns. The maps may also contain icons representing points of interest arranged in a cloud fashion. In this manner, the mapping paradigm also serves to increase traveler safety, provide navigation assistance during address-less trips, create valuable advertising space and new promotional opportunities, and dramatically increases the travelers' communications and entertainment options.

Abstract: Methods, systems, and apparatus are presented for processing a remote lock command message. In one aspect, a method includes receiving, by a mobile device, a remote lock command message comprising a lock command and specifying a passcode to be set by the mobile device, locking the mobile device in response to the received remote lock command message, setting an unlock passcode associated with the mobile device to the specified passcode, and generating an acknowledgement message in response to the remote lock command message. Further, receiving the remote lock command message can include accessing a subscribed topic hosted on a notification service, the subscribed topic being associated with a lock command, and retrieving the remote lock command message from the subscribed topic. Additionally, locking the mobile device can include locking a display such that access to information stored on the mobile device and device functionality are blocked.

Abstract: When a user specifies a road that he/she wants to pass through, a guiding route generation device generates a guiding route that passes through the specified road up to a destination. A guiding route (37) generated based on waypoints specified is stored in a storage device (15) of the guiding route generation device. A display device (11) displays the guiding route (37) along with roads in the periphery. The guiding route generation device specifies a certain road as the specified pass-through road from among the roads displayed along with the guiding route (37), and further, finds and determines whether there are crossings and the number of the crossings between the specified pass-through road and the guiding route (37).

Abstract: A method of providing intersection assistance with a portable electronic device to remind a user of traffic rules when the user approaches traffic intersections includes receiving an input from the user indicating a destination location for generating navigation instructions to the destination location, determining a current location of the portable electronic device according to received position signals, providing navigation instructions to the destination location according to the current location of the portable electronic device, and reminding the user of traffic rules related to intersections for a geographical location in which the portable electronic device is currently located when the portable electronic device detects that the portable electronic device is approaching an intersection, where reminding the user of traffic rules related to intersections comprises indicating a side of a second road the user should turn onto when making a turn from a first road onto the second road.

Abstract: Methods, systems, and apparatus are presented for processing a remote command message. In one aspect, a method includes accessing a subscribed topic hosted on a notification service, the subscribed topic corresponding to a mobile device, retrieving a remote command message included in the subscribed topic that identifies a command to be executed by the mobile device, determining whether the command can be executed by the mobile device, publishing a result message associated with the command, and executing, by the mobile device, the command based on the determining. Publishing the result message further can include identifying in the remote command message a result topic corresponding to the notification service and publishing the result message to the identified result topic. Additionally, the subscribed topic can be uniquely associated with the mobile device.

Abstract: A preferred route may be determined from an origin location to a destination location. The determination is made by processing directed links (e.g., one-way edges) in a graph that includes one or more links and two or more nodes. The determination of a preferred route may include an estimate of the time required at one or more intersections along alternative. Individual routing preferences, such as a preference of a rural over an urban route, also may be considered. Techniques are described that may help reduce the time required to identify a preferred route, including the identification and removal of no outlet routes before processing the directed links and techniques using particular data formats.

Abstract: A car navigation apparatus includes an intersection searching means 14 for searching for intersections in a vicinity of the current position of a vehicle from intersections which exist on a searched route and which exist between the current position and a destination, an intersection name outputting means 15 for outputting the names of the searched intersections, an intersection selecting means 17 for selecting an intersection from the intersection names outputted, an facility searching means 18 for searching for facilities which exist in a vicinity of the intersection selected through the map data, a facility name outputting means 19 for outputting the names of the searched facilities, a facility selecting means 20 for selecting a facility from the facility names outputted, and a facility information outputting means 21 for extracting facility information about the selected facility from the map data, and for outputting the facility information.

Abstract: A preferred route may be determined from an origin location to a destination location. The determination is made by processing directed links (e.g., one-way edges) in a graph that includes one or more links and two or more nodes. The determination of a preferred route may include an estimate of the time required at one or more intersections along alternative. Individual routing preferences, such as a preference of a rural over an urban route, also may be considered. Techniques are described that may help reduce the time required to identify a preferred route, including the identification and removal of no outlet routes before processing the directed links and techniques using particular data formats.

Abstract: A system and method for determining and displaying a navigation route on a navigation device from one vehicle position to a travel destination. The navigation device can include processor with RAM, a mass storage device for holding a database with geographic data, as well as a display. Depending on whether a complex intersection is present on the navigation route, the complex intersection can be shown on the display in the form of a single perspective view. Embodiments of the invention can provide a high level of correlation between the actual situation on the road as seen by the user and the corresponding navigation maneuver displayed on the screen. The graphic output of navigation devices for complex intersections can also be improved regardless of whether the navigation device is a high-performance or very simple device.

Abstract: The present invention provides a method of operating a telematics enabled mobile vehicle communication system. The method includes receiving a navigation request from a user interface to a telematics unit, receiving a location signal defining an approximate geographic location of the telematics unit to the telematics unit, analyzing the navigation request and the location signal to produce a navigation route defined by a plurality of navigation points including an initial navigation point and one or more additional navigation points, producing a local navigation zone and a global navigation zone based on the analyzed location signal wherein each navigation zone defines a geographic area concentrically radiating from a known geographic location, determining which navigation zone the initial navigation point is within, and producing navigation instructions that provide direction to navigation points along the navigation route and are based on the determined navigation zone and the navigation route.

Abstract: Embodiments provide systems and methods for generating a street map that includes a position identifier that identifies a location on the street map. The method and system may also generate and display a plurality of images representative of the location of the position identifier. A user may interact with a position identifier or one of several scroll icons to view images of other locations on the street map and/or to obtain driving directions between two locations.

Abstract: A method for distributed traffic navigation in a vehicular network is presented. At each vehicle entering the network, information associated with the vehicular network is acquired and stored, and destination addresses are broadcasted as route requests. At each vehicle in the network, the stored information is updated through vehicle to vehicle communication. At each junction, a header vehicle is selected for listening for broadcasts to determine the presence of a matrix. If the matrix is not present, the matrix is initialized based on the stored information of the header vehicle. The header vehicle further estimates travel time on the road segments based on the matrix, calculates a backlog indicator based on the segment travel time and the route requests. The header vehicle further updates the matrix and generates a route based on the matrix. The matrix is broadcasted from the header vehicle.

Abstract: A distance adjustment method and apparatus for a navigation system produces a maneuver instruction for an intersection at the most appropriate timing and location during the route guidance. The method includes the steps of: searching an upcoming intersection on the calculated route that requires the user to make a turn therein; retrieving data concerning the upcoming intersection from a map database; adjusting a final distance from a reference point of the intersection by evaluating the retrieved data concerning the intersection; and generating a maneuver instruction at a timing when the user has reached the adjusted final distance from the reference point of the intersection, thereby notifying the user to make a turning maneuver at the intersection.

Abstract: A preferred route may be determined from an origin location to a destination location. The determination is made by processing directed links (e.g., one-way edges) in a graph that includes one or more links and two or more nodes. The determination of a preferred route may include an estimate of the time required at one or more intersections along alternative. Individual routing preferences, such as a preference of a rural over an urban route, also may be considered. Techniques are described that may help reduce the time required to identify a preferred route, including the identification and removal of no outlet routes before processing the directed links and techniques using particular data formats.

Abstract: Route guidance apparatuses, methods, and programs determine a guidance intersection in front of a movable body in a direction of travel along a navigation route. The apparatuses, methods, and programs acquire a shape of the guidance intersection, determine an exit road on which the movable body leaves the guidance intersection, and determine whether the determined exit road is one of a plurality of roads connected to the guidance intersection that exist in an area extending in the same direction as the determined exit road. When the determined road is one of the plurality of roads that exist in the area extending in the same direction as the exit road, the apparatuses, methods, and programs associate each of the plurality of roads with an identification information item usable to identify a connecting relationship with the guidance intersection, and provide guidance using the identification information item associated with the exit road.

Abstract: Embodiments of the present invention provide a method and system for generating a street map that includes a position identifier that identifies a location on the street map. The method and system may also generate and display a plurality of images representative of the location of the position identifier. A user may interact with a position identifier or one of several scroll icons to view images of other locations on the street map and/or to obtain driving directions between two locations.

Abstract: A technique for efficient processing of annotations in images such as panoramic images is herein disclosed. In an embodiment, a first user annotation is received for a feature in a first panorama, and a second user annotation for the same feature is received in a second panorama. The coordinates for the feature can then be generated by computing the intersection between data generated for the first user annotation and for the second user annotations.

Abstract: A preferred route may be determined from an origin location to a destination location. The determination is made by processing directed links (e.g., one-way edges) in a graph that includes one or more links and two or more nodes. The determination of a preferred route may include an estimate of the time required at one or more intersections along alternative. Individual routing preferences, such as a preference of a rural over an urban route, also may be considered. Techniques are described that may help reduce the time required to identify a preferred route, including the identification and removal of no outlet routes before processing the directed links and techniques using particular data formats.

Abstract: A facility-around-route retrieval device includes a map disk 3 for storing map data and facility data, a route calculation unit 13 for calculating a route to a destination by using the map data stored in the map disk, a facility retrieval condition setting unit 16 for setting a facility retrieval condition, and a facility-around-route retrieval unit 17 for retrieving, in a case where a facility around the route calculated in the route calculation unit is retrieved in accordance with the condition set in the facility retrieval condition setting unit, the facility present only on a side of a traveling lane of a vehicle of a divided road from the facility data stored in the map disk when the route includes the divided road.

Abstract: A system for transferring information for at least one person in the area of an airport, comprising a) at least one personal end device which can be worn by the at least one person, b) a detection means for detecting the current spatial position of the at least one person in the area of the airport, c) a control means for determining at least one target time for a station located along the path to a flight gate assigned to the at least one person and/or for determining a path of the at least one person from a pre-determined position to the flight gate assigned to the person.

Abstract: Course guidance systems, methods, and programs determine that a vehicle is exiting from a facility to an out-of-facility road via an exit lane, and determine an estimated connection angle of the exit lane at an exit/entrance node. The systems, methods, and programs generate course guidance information based on the determined estimated connection angle when the vehicle is determined to be exiting. Based on the vehicle location information and the road information, the systems, methods, and programs detect whether an actual traveling road and the guidance road differ. Based on the vehicle location information and the road information, the systems, methods, and programs correct the estimated connection angle at the exit/entrance node based on a relative angle between the actual traveling road and the guidance road, and record the corrected estimated connection angle.

Abstract: A computer-implemented method for road identification includes receiving a request at a vehicle computing system for a crossroad identification. The method also includes determining, via the vehicle computing system, a crossroad along a route-being-traveled corresponding to the request. The method further includes outputting, from the vehicle computing system to an output, the determined crossroad responsive to the request.

Abstract: Provided is a technology capable of improving the accuracy of determining a position of an own vehicle in the vicinity of a branch point, in a current position determining device. The current position determining device identifies a detection range according to states of a road on which a vehicle is traveling to detect a lane change, to thereby determine a current position of the vehicle based on information on the detected lane change.

Abstract: A navigation system includes a lane information acquiring unit 27 for acquiring both the number of lanes of a road which forms an intersection, and lane information which defines a road branching off from each of the lanes, a lane direction determining unit 28 for determining the direction of each of the lanes on the basis of both the lane information acquired by the lane information acquiring unit, and a road attribute of an incoming road coming into the intersection and a road attribute of an outgoing road extending from the intersection, the road attributes of the incoming and outgoing roads being included in map data acquired by a map data acquiring unit, and a lane information display unit 29 for displaying the direction of each of the lanes determined by the lane direction determining unit with an arrow.

Abstract: The invention may allow an in-vehicle unit of a vehicle located in a shadow portion of a large-sized vehicle and an in-vehicle unit of a vehicle at a location separated from an intersection 193 to receive traffic information. A UHF beacon unit 112 is disposed at the intersection 193, thereby distributing the traffic information using a UHF beacon signal having a diffraction characteristic. This arrangement can allow the in-vehicle unit of the vehicle located in the shadow portion of the large-sized vehicle as well to receive the traffic information. Further, since the UHF signal propagates far, this arrangement can allow the in-vehicle unit of the vehicle at the location separated from the intersection 193 as well to receive the traffic information. The UHF beacon unit 112 transmits the UHF beacon signals with the different traffic information set therein by time division and frequency division.

Abstract: A navigation device which stores a captured image of an area ahead of user in a moving direction after turning at an intersection and displays the captured image before turning at the intersection, includes: a first storage unit (HDD recording/playback unit 14) storing a map; a display unit (display unit 18); and a control unit (control unit 10) displaying the map on the display unit, and the navigation device further includes a second storage unit (HDD recording/playback unit 14) storing a captured image of an area to be entered after a turn is made at an intersection, and the control unit displays the captured image stored in the second storage unit on the display unit before a mobile body reaches the intersection.

Abstract: Provided is a technology of a navigation device which is capable of identifying an intersection or the like based on designation of an incomplete name of a street in which an input of a first keyword and an input of a second keyword are received, and a connection point of a first street having a street name which includes at least in part the first keyword and a second street having a street name which includes at least in part the second keyword is identified, to thereby save the user, who is not always familiar with the geography of a search target area, from the inconvenience of inputting a complete name of the first street, based on which the second street is retrieved and selected and an intersection point of the first street and the second street is identified.

Abstract: An efficient route-defining method includes determining a route to a destination. The exemplary method also includes determining a wireless device to server connection type and assigning a tolerance in accordance with a connection type. The tolerance is usable to determine if a vehicle is off-route, and the tolerance is increased or decreased inversely corresponding to the speed of the connection type. According to the illustrative method, the assigned tolerance is used to determine points defining the route, such that the roads comprising the route are within a bounded area. The bounded area may be defined by the tolerance in conjunction with a plurality of lines connecting successive points along the route. Finally, the method includes delivering the determined points to a vehicle computing system in communication with the server.

Abstract: A navigation apparatus dynamically sets a frequency of updating a guide arrow in accordance with certain circumstances. The navigation apparatus performs the route guidance by displaying the photographed image and includes a searching section for searching a route from a current position to a destination; and a drawing section for displaying the guide arrow which indicates the route searched by the searching section such that the guide arrow is superimposed on the photographed image, wherein the drawing section dynamically sets a frequency of updating a display of the guide arrow based on a predetermined condition.

Abstract: In a communication type navigation system, a center apparatus receives a present position and destination from an in-vehicle navigation apparatus and thereby calculates a route by searching map data, which is constantly updated. The in-vehicle navigation apparatus receives the calculated route with course information from the center apparatus. When approaching a passing point included in the route, the navigation apparatus displays the course information in the travel direction in superimposition on a forward image around the passing point. The route guide can be thus appropriately performed to follow an actual road state. The above configuration of the system helps prevent problems in costs and workloads resulting from an in-vehicle navigation apparatus holding map data therein.

Abstract: Disclosed is a method and device for aiding ground navigation of an aircraft on an airport in which a current position and current heading of the aircraft are determined by a set of information sources. A first determination unit determines, according to the determined current position and current heading, and according to information obtained from an airport database, a current traffic lane on which the aircraft is situated, and parameters relating to a next intersection of the current traffic lane. Parameters relating to the next intersection include the position of the next intersection; and the distance between the next intersection and the current position of the aircraft. A head-up display unit overlays, on an environment in front of the aircraft, a first symbol illustrating the determined current traffic lane and a set of second symbols illustrating the determined parameters of the next intersection.

Abstract: A method and apparatus for a navigation system determines whether an upcoming cross street is meaningful for a user to be displayed. The includes the steps of searching upcoming cross streets that intersect with a current street on which a user's vehicle is running for a predetermined distance range ahead of a current vehicle position, retrieving data concerning the upcoming cross streets from the map data, determining whether a cross street is meaningful for the user to be displayed on a screen of the navigation system by applying predetermined rules to the data concerning the cross street, and displaying information on the cross street that has been determined to be meaningful for the user on the screen.

Abstract: A system and method for combining sequential map segments to aggregate, analyze, and display traffic data collected from one or more probe vehicles located on one or more of the map segments.

Abstract: A motor vehicle is provided having a collision warning system that can map an upcoming road section for the motor vehicle. The system can evaluate potential paths for the road section based on vehicle travel history information through it. The system can receive the information from a transmitter proximate the road section, such as a roadside transmitter or one or more nearby vehicles having traversed the road section. The road section can include an intersection and the system can determine a lane configuration for at least a portion of it based on vehicle travel history information. The system can calculate a threat of collision for the motor vehicle with a target vehicle based on map data obtained from estimated paths or lane configurations for the road section. Methods pertaining to mapping a road section and operation of the system are also provided.

Abstract: The present invention relates to a method for displaying enlargement images of an intersection in a navigation device. More particularly, the present invention is characterized to provide enlargement images of an intersection in sequence, thereby improving visibility and accuracy of a navigation device in providing direction guidance at intersections. The present invention of a method for displaying enlargement images of an intersection in a navigation device, wherein the navigation device finds a path to destination to guide a user thereof, includes calculating distance-to-go from a present position of a vehicle to an intersection in the path; estimating a predicted time to reach said intersection on the basis of the speed of said vehicle and said distance-to-go to said intersection; and displaying enlargement images of said intersection at a set time before said predicted time to reach said intersection.

Abstract: A navigation device includes a map database 5 that holds map data; a location and direction measurement unit 4 that measures the current location and direction of a vehicle; a route calculation unit 12 that, based on map data read from the map database 5, calculates a route from the current location measured by the location and direction measurement unit to a destination; a camera 7 that captures video images ahead of the vehicle; a video image acquisition unit 8 that acquires the video images ahead of the vehicle captured by the camera; a road width acquisition unit 16 that, based on road width data included in the map data read from the map database, calculates the width of a road segment that enters last into an intersection to which the vehicle is to be guided from among road segments that make up the route calculated by the route calculation unit; a video image composition processing unit 14 that limits the length of a portion that indicates a turning direction of a route guide arrow to the road width ca

Abstract: A route guiding apparatus includes a subtraction distance calculating unit 18 for calculating a distance from an entrance of a guidance intersection determined by a route guidance unit 16 to a center of the guidance intersection according to the width of a road going out of the guidance intersection in a direction along a route to define the distance as a subtraction distance, a notification distance calculating unit 19 for subtracting the subtraction distance calculated by the subtraction distance calculating unit from the distance from a current position detected by a current position detecting unit 12 to the center of the guidance intersection determined by the route guidance unit to calculate a notification distance to be notified, and a display unit 20 for displaying the notification distance calculated by the notification distance calculating unit.

Abstract: A method for route simulation operation on a navigation system is able to complete the route simulation operation within a short period of time. The method includes the steps of: calculating a route from a starting point to a destination; determining a first route simulation speed for a preset number of first turns from the starting point; determining a second route simulation speed for a preset number of last turns before the destination; determining a third route simulation speed for a remaining part of the calculated route; and displaying a progression indicator on the calculated route to the destination on a map image on the screen of the navigation system and moving the progression indicator based on the simulation speeds determined in the above steps.

Abstract: Information is acquired that indicates a current road on which a vehicle is traveling. Information is acquired that relates to a plurality of branching roads that branch off from the current road at a branching point that lies ahead in the direction of movement of the vehicle. In a situation where route guidance is not being used, a determination is made as to whether or not there is a possibility that the vehicle will proceed on one of the branching roads that is of a different type from the current road, instead of on one of the branching roads that is of the same type as the current road and has an attribute that is of the same type as an attribute of the current road. If it is determined that there is a possibility that the vehicle will proceed on one of the branching roads that is of a different type, guidance is performed that informs the driver that the possibility exists.

Abstract: A navigation system is provided for instructing an operator of a vehicle. The navigation system includes a navigation processor configured to obtain a destination location, and to generate a proposed route to the destination location. The navigation system also includes a presentation element coupled to the navigation processor, the presentation element configured to provide navigation instructions to the operator. A selection module is coupled to or incorporated into the navigation processor, and the selection module is configured to select a cartographic resolution from a plurality of different cartographic resolutions, resulting in a selected cartographic resolution. The presentation element provides navigation instructions for at least a portion of the proposed route, using the selected cartographic resolution.

Abstract: A method of stitching converging path segments to aesthetically label Y-intersections, path bifurcations or splits in roads or the like entails determining which pair of adjacent path segments subtend the largest angle. The path segments subtending the largest angle are reconstructed (stitched together) and a single instance of the label is then rendered along the reconstructed path. Although this stitching can be performed on the client device, pre-stitching server-side is even more efficient in terms of economizing over-the-air bandwidth and onboard processing resources.

Abstract: A method for operating a navigation device provides a driver with the option of being presented with an overview of the route lying ahead in addition to a detailed illustration of the current position along the route section, namely without any complicated interactions with the navigation device. This navigation device independently changes the scale of the display of the route on the display means in dependence on a manually selected operating mode. The advantage of this method can be seen in a semi-automated solution that always enables the driver to decide exactly which information should be displayed by his navigation device at which time.

Abstract: A control circuit of a navigation apparatus acquires exit port information in a rotary intersection for route guidance. It is determined whether a guidance point or guidance target used as an exit path from the rotary intersection is a learned road acquired by the road learning function. When the exit path is not a learned road, namely, when the exit path is an existing road in a ready-made map data, an “exit path guidance for existing roads” aimed at an exit port to an existing road is executed. In contrast, when the exit path from the rotary intersection is a learned road, an “exit path guidance for learned roads” aimed at an exit port to a learned road is executed.