JP2016006390A - Electronic equipment, cross point guide method and guide program - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide electronic equipment for promoting safe lane changing, and cross point guide method and guide program.SOLUTION: A navigation device guides lane changing, when it is determined that a vehicle stops at a second cross point 320 in front of a first cross point 310, and guides lane maintenance, when it is determined that, the vehicle does not stop, based on signal information provided by an optical beacon 300. Therefore, according to a travel direction of the first cross point 310, a user can change a lane more safely.

Description

  The present invention relates to an electronic apparatus having a navigation function, and more particularly to an intersection guidance method when signal information of a plurality of intersections existing in a traveling direction is received.

  Normally, in the navigation function, when a route that turns right and left at an intersection is searched, when a certain distance is reached before the intersection, an intersection guidance by voice or image is output.

  The navigation device disclosed in Patent Document 1 obtains traffic jam information from an information providing server via wireless communication and performs guidance in the traveling direction. For example, it is determined whether or not there is a first vehicle train that continues from the guide point where the vehicle should change the course, and whether or not there is a second vehicle train between the first vehicle train and the vehicle. Whether or not there is a section in which the host vehicle can enter between the first and second lanes when the first and second lanes exist. When it is determined that there is a section, it is guided that the vehicle should enter before the first vehicle train.

  The navigation device disclosed in Patent Document 2 guides all the lanes that pass through the intersection in the traveling direction as recommended lanes for the road section immediately before the intersection whose course is to be changed, and the next intersection without changing the course at the intersection. For the road section just before the intersection where the course is to be changed, the lane located on the recommended lane side in the left-right direction is guided.

JP 2010-66001 A JP 2012-137371 A

  In a conventional navigation device, when the traveling direction of an intersection corresponds to a right turn or a left turn, guidance is performed when the vehicle reaches a certain distance before the intersection, for example, 700 m, 300 m, or 50 m. Such guidance is basically performed based on intersections including right and left turns, road links, and own vehicle position information.

  FIG. 12 is a diagram illustrating guidance when going straight at the intersection C1 and turning left at the intersection C2. When the host vehicle M reaches the position P1 at the distance L1 from the intersection C2, the navigation device performs guidance G1 for turning left at the intersection C2, for example, guidance “the distance L1 is ahead”. Next, when the vehicle M arrives at a position P2 at a distance L2 from the intersection C2, a guidance G2 of “I will be in the left direction” is performed, and when the vehicle M arrives at a position P3 immediately before the intersection C2, It ’s about to go to the left. ”

Here, it is assumed that the straight road lanes A and B and the right turn lane C are set in the road section 500 before the intersection C1, and the own vehicle M is traveling on the straight road lane B. At this time, if the signal at the intersection C1 changes to red and the own vehicle M stops at the intersection C1, the own vehicle M must change lanes to the left lane immediately after changing to the green light.
In this situation, when other vehicles Q1 and Q2 are traveling on the straight lane A, the other vehicles Q1 and Q2 also go straight at the same time immediately after the green light, so that the vehicle M is in the lane to the left lane. Change is difficult and dangerous.

  The present invention solves such a conventional problem, and an object thereof is to provide an electronic device that prompts a safe lane change, an intersection guidance method, and a guidance program.

  An electronic device having a navigation function according to the present invention includes: a receiving unit that receives road traffic information including signal information of an intersection; and a plurality of existing on a route to be guided from the road traffic information received by the receiving unit. Extraction means for extracting signal information of the intersection, intersection determination means for determining the first intersection that makes a right turn or a left turn on the route to be guided, and a second before the first intersection determined by the intersection determination means Based on the signal information of the intersection, guidance determination means for determining whether or not to change the lane in the road section before the second intersection, and output for outputting guidance on the lane change based on the determination result of the guidance determination means Means.

  Preferably, the guidance determination means further includes a stop determination means for determining whether or not to stop at the second intersection based on the signal information, and the guidance determination means is determined by the stop determination means at the second intersection. When it is determined to stop, it is determined that the lane change should be made in the road section before the second intersection. Preferably, the guidance determination unit determines that the lane change should not be performed in the road section before the second intersection when the stop determination unit determines that the vehicle does not stop at the second intersection. Preferably, the guidance determination means determines that the lane should be changed after the own vehicle has passed the second intersection. Preferably, the intersection determination means further includes lane determination means for determining whether a right turn or left turn lane is set at the first intersection, and the guidance determination means determines whether the right turn or left turn lane is detected by the lane determination means. When it is determined that it is set, it is determined that the lane change should be made in the road section before the second intersection. Preferably, the road traffic information further includes traffic jam information, and the electronic device further includes traffic jam discrimination means for discriminating whether or not there is a traffic jam based on the traffic jam information. When it is determined that there is a traffic jam between the first intersection and the second intersection, it is determined that the lane change should be performed in the road section before the second intersection. Preferably, the guidance determination means further includes second intersection lane determination means for determining whether a right turn or left turn lane is set at the second intersection, and own vehicle lane for identifying the lane in which the own vehicle is traveling. And the guidance determination means includes the second intersection lane determination means and the own vehicle lane identification means, and the vehicle is not traveling in a right turn lane or a left turn lane in a road section in front of the second intersection. In this case, it is determined that the lane change should not be performed. Preferably, the road traffic information includes information on whether or not a vehicle exists in parallel with the own vehicle, and the guidance determination means should not change lanes when a vehicle exists in parallel with the own vehicle. Is determined.

  An intersection guidance method according to the present invention is in an electronic apparatus having a navigation function, the step of receiving signal information of a plurality of intersections existing on a route to be guided, and a right turn or a left turn on the route to be guided Lane change in the road section before the second intersection based on the signal information of the second intersection before the first intersection determined by the determining step and the first intersection determined by the determining step. And a step of outputting guidance regarding lane change based on the determination result.

  An intersection guidance program according to the present invention is executed by an electronic device having a navigation function, and receives a signal information of a plurality of intersections existing on a route to be guided, and a right turn on the route to be guided. Alternatively, a lane change is made in a road section in front of the second intersection based on the signal information of the second intersection before the first intersection determined by the step of determining the first intersection that makes a left turn and the first determination. And a step of outputting guidance regarding lane change based on the determination result.

  According to the present invention, signal information of a plurality of intersections existing on a route to be guided is extracted, and a road ahead of the second intersection based on the signal information of the second intersection before the first intersection that turns right and left Since it is determined whether or not to change the lane in the section and the guidance is output based on the determination result, the user can change the lane more safely and appropriately when turning right or left at the first intersection. It can be carried out.

It is a block diagram which shows the structure of the navigation apparatus which concerns on the Example of this invention. FIG. 2 is a diagram showing a functional configuration of the intersection guidance program of the present embodiment. It is a flowchart explaining the intersection guidance method of the navigation apparatus which concerns on the Example of this invention. It is a figure which shows the example of guidance of a lane change by 1st Example of this invention. It is a figure which shows the example of a guidance of lane maintenance by 1st Example of this invention. It is a figure which shows the example of guidance by the 2nd Example of this invention. It is a flowchart of the intersection guidance which concerns on the 4th Example of this invention. It is a figure which shows the example of guidance of the lane change by 4th Example of this invention. It is an example of guidance of lane maintenance by the 4th example of the present invention. It is a figure which shows the example of guidance of the lane change by 4th Example of this invention. It is an example of guidance of lane maintenance by the 4th example of the present invention. It is a figure explaining the subject of the conventional navigation apparatus.

  Next, embodiments of the present invention will be described in detail with reference to the drawings. The electronic device of the present invention is fixedly mounted on a moving body such as an automobile, and can be brought into the moving body by a user (for example, a smartphone such as a multi-function phone or a tablet terminal), Alternatively, any one that is detachable from the moving body may be used. The electronic device of the present invention is equipped with a navigation function, but other functions such as a function for reproducing audio / video data, a function for receiving television / radio broadcasts, a function for executing application software, and the like are integrated. It may be provided. Furthermore, the electronic device of the present invention may itself store road map data for executing a navigation function in a storage device, or may be a distribution site on the Internet or via a data communication means such as wireless communication. The necessary road map data may be acquired from a distribution server or the like. In the following embodiments, a navigation device mounted on a vehicle is illustrated as an example of an electronic device.

  FIG. 1 is a block diagram showing a configuration of a navigation device according to an embodiment of the present invention. The navigation device 100 includes a position information acquisition unit 102 that acquires own vehicle position information, a traffic information acquisition unit 104 that acquires road traffic information such as traffic jams and traffic restrictions, a user input unit 106 that receives input from a user, wired or wireless A data communication unit 108 that enables data communication with the outside, a display unit 110 that displays a road map or the like on a display, an audio output unit 112 that outputs sound, a storage unit 114, and an external device that enables connection with external devices An interface (I / F) 116 and a control unit 118 that controls each unit are configured. The configuration shown here is an example, and the navigation device is not necessarily limited to such a configuration.

  The position information acquisition unit 102 is mounted on a vehicle such as a gyro sensor or an acceleration sensor that detects the absolute position of the own vehicle using a signal transmitted from a GPS satellite 136 (see FIG. 1B), for example. The relative position of the vehicle can be detected from various sensors. Further, as shown in FIG. 1B, the position information acquisition unit 102 can access the position information distribution site (or distribution server) 130 via the network 120 and acquire the vehicle position information therefrom. . In this case, connection to the network 120 is performed via the data communication unit 108.

  The traffic information acquisition unit 104 acquires, for example, road traffic information superimposed on FM radio broadcasts and other broadcast waves, or by radio from antennas or optical beacons installed on roadsides such as highways and highways. Information can be acquired. The road traffic information may include various types of information, but may include intersection signal information, road alignment information, obstacle detection information, traffic jam information, and the like. In a further preferred aspect, signal information of a plurality of intersections of travel destinations can be acquired from an optical beacon installed on the roadside. Further, as shown in FIG. 1B, the traffic information acquisition unit 104 can access a road traffic information distribution site (or distribution server) 134 via the network 120 and acquire road traffic information therefrom. . In this case, connection to the network 120 is performed via the data communication unit 108.

  The user input unit 106 provides an interface between the user and the navigation device 100. The user input unit 106 can include an input key device, a touch panel, a voice recognition device, and the like. The data communication unit 108 enables wired or wireless data communication using WiFi, LAN, infrared communication, a telephone line, or the like. The data communication unit 108 may have a built-in function in the navigation device, or may use a communication function by externally connecting a mobile phone or a smartphone. As described above, the data communication unit 108 can be connected to various data distribution sites via the network 120 as shown in FIG.

  The display unit 110 displays a search result when a facility search or the like is performed, displays a road map when guiding a guidance route to a destination, a menu screen for making various settings of the navigation device, and the like Including a touch panel compatible display. The audio output unit 112 includes a speaker that outputs guidance route guidance, various warnings, and the like.

  The storage unit 114 can store road map data and the like necessary for the operation of the navigation device 100. In one example, the storage unit 114 includes a large-capacity storage device, and a database such as road map data and facility data can be stored therein. The road map data includes link data, intersection (node) data, and the like. In another example, the storage unit 114 can access the road map data distribution site 132 via the network 120 as shown in FIG. 1B and acquire necessary road map data and the like therefrom. In this case, connection to the network 120 is performed via the data communication unit 108.

  In a preferred embodiment, the control unit 118 includes a microcontroller including a ROM, a RAM, and the like, and the ROM or the RAM can store various programs for controlling the operation of each unit of the navigation device. Programs include, for example, those that display a road map using a map database, etc., those that search for facilities using a database, etc., those that search for destinations and waypoints, and search for the optimal route to the destination To be included. Furthermore, the control unit 118 includes an intersection guide program that guides an intersection during route guidance to a destination.

  FIG. 2 is a diagram showing a functional configuration of the intersection guidance program of the present embodiment. The intersection guidance program 200 is activated when a guidance route to the destination is searched and guidance for this route is started. The intersection guidance program 200 includes a route information acquisition unit 202 that acquires route information to the destination, an intersection determination unit 204 that determines an intersection existing on the route to the destination, and a right turn or a route on the route to the destination. A right / left turn intersection discriminating unit 206 for discriminating an intersection to turn left, a signal information extracting unit 208 for extracting signal information of an intersection on a route to a destination from road traffic information acquired by the traffic information acquiring unit 104; , Based on the signal information extracted by the signal information extraction unit 208, a guidance determination unit 210 that determines whether or not to change the lane at an intersection before the intersection that turns right and left, and a lane change based on the determination result of the guidance determination unit 210 And a guide information generation unit 212 that generates guide information regarding.

  The route information acquisition unit 202 acquires route information including the guidance route when a guidance route to the destination is searched. The route information includes a set of roads (link data) and intersections (node data) from the departure point to the destination.

  The intersection determination unit 204 determines an intersection included in the acquired route information. The intersection determination unit 204 can further acquire detailed information regarding the intersection on the route with reference to the road map data acquired from the storage unit 114 or the distribution site 132. For example, the type of intersection depends on whether the approaching link of the identified intersection is a plurality of lanes, whether a dedicated right or left lane is set for the approaching link, and the number of entering and exiting links It is possible to determine whether a traffic light is installed at an intersection (for example, a three-way intersection or a crossroad).

  The right / left turn intersection discriminating unit 206 discriminates an intersection that makes a right turn or a left turn from the intersections on the route. Preferably, the right / left turn intersection determination unit 206 can determine whether to turn right or left at the intersection based on the relationship between the entrance link and the exit link passing through the intersection. Alternatively, the right / left turn intersection determination unit 206 can also determine whether to turn right or left when the guidance route changes from a main road to another road based on the road type of the link data. In the following description, for the sake of convenience, the intersection determined by the right / left turn intersection determination unit 206 is referred to as a first intersection.

  The signal information extraction unit 208 extracts signal information related to traffic lights existing on the route from the road traffic information included in the traffic information acquisition unit 104. Typically, a traffic light is installed at an intersection, but also exists at a position where a pedestrian crossing is installed in addition to the intersection, the signal information of such a traffic signal is also extracted.

  In a preferred embodiment, the traffic information acquisition unit 104 acquires signal information provided from an optical beacon installed on a general road. For example, an optical beacon installed at a position Q before a certain intersection P provides not only signal information of the intersection P but also signal information of a plurality of intersections ahead of it. Therefore, when the own vehicle passes the optical beacon at the position Q, it can acquire the signal information of the intersection P and the signal information ahead of it at a time. The signal information can include, for example, traffic signal position information, traffic light color information (blue, red, green duration or cycle time, etc.).

  When the vehicle travels on the road section of the second intersection before the first intersection determined by the right / left turn intersection determination unit 206, the guidance determination unit 210 uses the second intersection signal information based on the second intersection signal information. It is determined what kind of guidance should be provided in the road section before the intersection. For example, the guidance determination unit 210 determines that guidance should be given to prompt a lane change in response to a right turn or a left turn at the first intersection in the road section before the second intersection. Alternatively, the guidance determination unit 210 determines that guidance should be made so as to go straight through the second intersection.

  In a preferred embodiment, the guidance determination unit 210 determines whether or not the vehicle stops at the second intersection based on the signal information. Specifically, the time T when the host vehicle passes the second intersection is estimated, and the light color of the second intersection at the estimated time T is estimated. For example, the distance from the current position acquired from the position information acquisition unit 102 to the second intersection is calculated, the traveling speed of the host vehicle is calculated based on a signal from the vehicle speed sensor, and the second intersection is calculated from the distance / speed. Estimate the time T to arrive at Furthermore, the lamp color of the second intersection after the elapse of time T is estimated based on the received signal information of the second intersection. In addition to the above, the speed of the host vehicle may use a speed limit of a road on which the host vehicle is traveling or a link travel time set for a link.

  In a preferred embodiment, when the guidance determination unit 210 determines that the vehicle stops at the second intersection, the guidance determination unit 210 determines that the lane change should be made in the road section before the second intersection, and does not stop. It is determined that the vehicle should go straight on without changing the lane in the road section before the second intersection.

  In a more preferable aspect, the guidance determination unit 210 determines the lane in which the vehicle is traveling, determines whether a right / left turn-only lane is set at the first intersection and the second intersection, Determine whether there is traffic jam between the first intersection and the second intersection or before the second intersection, or there is another vehicle in the lane adjacent to the lane where the vehicle is traveling It is possible to determine whether or not to perform guidance and comprehensively determine what guidance should be provided from these determination results.

  The guidance information generation unit 212 generates guidance information according to the determination result of the guidance determination unit 210. The guide information is preferably stored in the storage unit 114, from which the guide information is read. The guidance information generated by the guidance information generation unit 212 is provided to the display unit 110 and the voice output unit 112.

  Next, the intersection guidance operation of the navigation device according to the first embodiment of the present invention will be described with reference to the flowchart of FIG. When the destination is set by the user, a route from the current location or the departure location to the destination is searched, and guidance for the searched route is started (S100). Simultaneously with this guidance, the route information acquisition unit 202 acquires route information to the destination (S102), the intersection determination unit 204 determines an intersection existing on the route (S104), and a right / left turn intersection determination unit 206. Discriminates the first intersection that turns right and left (S106), and stores the discrimination result in the storage unit 114.

  While the host vehicle is traveling, the traffic information acquisition unit 104 acquires various road traffic information from an optical beacon, radio beacon, FM radio broadcast, road traffic information distribution site 134, etc. installed on the roadside (S108). For example, the traffic information acquisition unit 104 acquires signal information of traffic lights such as intersections from optical beacons installed on the roadside. The signal information of the traffic light may include signal information of not only the nearest intersection of the road on which the vehicle is traveling, but also a plurality of intersections installed before the intersection. Therefore, the signal information may include position information where the traffic signal is installed as information for identifying each traffic signal, and may further include information on the light color of each traffic signal.

  The signal information extraction unit 208 determines whether or not the signal information is included in the road traffic information (S110). If it is determined that the signal information is included, the guidance determination unit 210 determines that the position information acquisition unit 102 It is determined whether or not the first intersection determined by the right / left turn intersection determination unit 206 exists ahead of the own vehicle position acquired in step S112. When the first intersection exists, the guidance determination unit 210 determines whether or not the host vehicle stops at the second intersection based on the signal information of the second intersection before the first intersection (S114). ).

  The second intersection is an intersection determined by the intersection determination unit 204 and is an intersection existing ahead of the first intersection. In one aspect, the second intersection may be an intersection closest to the first intersection, and in another aspect, one or more intersections are between the first intersection and the second intersection. There may be one or more traffic lights between the first intersection and the second intersection. In yet another aspect, the second intersection can be selected according to the distance from the first intersection. For example, if it is a specification that outputs the first intersection guidance when the vehicle reaches L1 meter before the first intersection, the second intersection is an intersection that is further than the distance L1 from the first intersection. Can be.

  Next, when it is determined that the host vehicle stops at the second intersection, the guidance determination unit 210 determines that the lane change should be performed in the road section before the second intersection (S116). On the other hand, when it is determined that the host vehicle does not stop at the second intersection, it is determined that the lane should be maintained in the road section before the second intersection (S118).

  Next, the guidance information generation unit 212 generates guidance information according to the determination result of the guidance determination unit 210 (S120), and the display unit 110 and the voice output unit 112 according to the generated guidance information, guide images and guidance voices. Is output.

  Next, a specific example of intersection guidance in the navigation device of the present embodiment will be described. FIG. 4 shows an example of guiding the lane change in the road section before the second intersection. It is assumed that the guidance route K to the destination turns left at the first intersection 310. While the vehicle M is traveling on the road R according to the guidance route K, the vehicle M receives road traffic information from the optical beacon 300. As described above, the road traffic information may include various types of information. Here, the road traffic information includes signal information related to traffic lights at the second intersection 320 and the first intersection 310.

  When the signal information is received, the guidance determination unit 210 determines whether or not the own vehicle M stops at the second intersection 320. For example, the guidance determination unit 210 predicts a time T for the host vehicle M to reach the second intersection 320 from the traveling speed of the host vehicle M and the distance from the host vehicle position to the second intersection 320. Furthermore, the guidance determination unit 210 estimates the color of the traffic light at the second intersection 320 after the time T has elapsed from the received signal information. And if the traffic light of the 2nd intersection 320 is red, it will determine with the own vehicle M stopping.

  When it is determined that the host vehicle M is to stop at the second intersection, the guidance determination unit 210 determines that the lane change is to be performed, and accordingly, the guidance information generation unit 212 generates guidance information regarding the lane change. This is output in the road section before the second intersection. For example, a guidance 330 such as “change to the left lane and then go straight on the second intersection” is output. After passing through the second intersection 320, the same intersection guidance as usual is performed, and for example, a guidance 340 such as “the next intersection is about to go left” is output.

  FIG. 5 shows an example of guidance for maintaining the lane in the road section before the second intersection. The guidance determination unit 210 determines that the lane should be maintained when it is determined that the host vehicle M passes the second intersection 320 with a green light (when it is determined not to stop). The guide information generation unit 212 generates a guide according to the determination result, and thereby, for example, a guide 332 such as “Please maintain the lane” is output in the road section before the second intersection 320. Is done. More preferably, the guidance determination unit 210 determines that the lane change should be made after passing through the second intersection 320, and accordingly, after passing through the second intersection 320, “this is the left direction” Such a guide 334 is output.

  4 and 5 show an example in which the second intersection 320 is adjacent to the first intersection 310. As described above, the second intersection is more than the first intersection 310. Any one or more intersections or traffic lights may exist between the first intersection 310 and the second intersection 320 as long as they exist in the foreground.

  Next, a second embodiment of the present invention will be described with reference to FIG. In the second embodiment, intersection guidance when a parallel vehicle exists in a lane adjacent to a lane in which the host vehicle is traveling will be described. As shown in FIG. 6, when an imaging camera 350 for monitoring the traveling state of the road section before the second intersection 320 is installed, the lane A of the road section of the second intersection 320 is taken from the captured image. , B, and C can be detected. Such vehicle detection information by the imaging camera 350 is provided together with signal information by the optical beacon 300.

  When the vehicle information is acquired by the traffic information acquisition unit 104, the guidance determination unit 210 determines that the vehicle M is to stop at the second intersection 320. If there is a parallel running vehicle Q, it is determined that the lane change should not be performed. It is inappropriate to prompt the lane change when the parallel running vehicle Q is present in the lane A as the lane change timing. Therefore, guidance for changing the lane is not performed before the second intersection 320 or guidance for maintaining the lane is performed.

  As another preferable example of the second embodiment, the guidance determination unit 210 determines a lane in which the host vehicle M is traveling in a road section before the second intersection 320. For example, the lane is determined based on the vehicle position obtained from the position information acquisition unit 102 and the lane information of the road R. Or you may discriminate | determine the lane which the own vehicle drive | works from radio | wireless communication, such as DSRC installed in the roadside, and the image | video of the vehicle-mounted camera mounted in the own vehicle. The guidance determination unit 210 determines whether the lane in which the vehicle M is traveling and the lane of the parallel running vehicle are the same, and if not, the lane of the parallel running vehicle matches the lane on the lane change side. If they match, it is determined that the lane change should not be performed. In the example of FIG. 6, when the own vehicle M is traveling on the lane B and the parallel running vehicle is traveling on the lane A, the lane is even if the own vehicle M stops at the second intersection 320. Determine that changes should not be made.

  Next, a third embodiment of the present invention will be described. In the third embodiment, intersection guidance when a dedicated lane is set for the approach link of the first intersection 310 will be described.

  The guidance determination unit 210 acquires the lane information of the approach link of the first intersection 310 from the storage unit 114 or the like, and determines whether or not a dedicated lane such as a right turn or a left turn is set at the first intersection 310. As shown in FIG. 4, when the route is a left turn at the first intersection 310, it is determined whether or not the lane D of the first intersection 310 is a left turn exclusive lane. When the left turn exclusive lane is set, the guidance determination unit 210 determines that the lane change should be performed in the road section of the second intersection 320. In this case, not only when it is determined that the vehicle M stops at the second intersection 320, but also when the vehicle M determines that it can pass the traffic light at the second intersection 320 in blue, It is determined that the lane change should be made in the road section in front. Thereby, the lane change at an early timing is made possible.

  Next, it is determined whether a right turn or left turn dedicated lane is set at the second intersection 320. In the example of FIG. 4, it is determined whether the lanes A and C are a left turn lane and a right turn lane, respectively. Even if it is determined that the vehicle M is stopped at the second intersection 320 when the vehicle is traveling in lane B and a left turn exclusive lane is set in lane A, the guidance determination unit 210 It is determined that the lane change should not be performed in the road section before the second intersection 320.

  Next, a fourth embodiment of the present invention will be described. If there is traffic jam before and after the intersection, the lane may not be changed as intended. Therefore, in the fourth embodiment, the optimum lane guidance is urged depending on whether or not there is a traffic jam in the vicinity of the first intersection and the second intersection.

  FIG. 7 is an operation flow of intersection guidance according to the fourth embodiment. First, the own vehicle M acquires road traffic information from the optical beacon 300, VICS (registered trademark), the road traffic information distribution site 134 (FIG. 1), etc. (S200). The intersection guidance program 200 extracts traffic jam information from the road traffic information and provides the extracted traffic jam information to the guidance determination unit 210.

  Next, the guidance determination unit 210 determines whether or not the own vehicle stops at the second intersection as in the first embodiment (S202). When it is determined that the vehicle does not stop at the second intersection, the guidance determination unit 210 further determines that the traffic is the first between the first intersection 310 and the second intersection 320 based on the congestion information. It is determined whether or not there is a traffic jam (S204). If it is the first traffic jam, the guidance determination unit 210 determines that the lane should be changed to the traveling direction side in the road section before the second intersection (S206). This is because if there is a traffic jam when passing through the second intersection, the lane change may not be executed as intended. On the other hand, if there is no first traffic jam, it is determined that the lane should be maintained as in the first embodiment (S208).

  When it is determined that the vehicle stops at the second intersection, the guidance determination unit 210 determines whether the traffic congestion is the second traffic congestion in the road section before the second intersection based on the traffic congestion information. (S210). If it is the second traffic jam, the guidance determination unit 210 determines that the lane should be maintained (S208). In this case, the lane change becomes easier after passing through the second intersection. If it is not the second traffic jam, it is determined that the lane should be changed to the course change side (S206).

  FIG. 8 is an example of lane change guidance when there is a first traffic jam in the fourth embodiment, and shows a case where a right turn is made at the first intersection 310. When it is determined that the guidance determination unit 210 passes the traffic light at the second intersection 320 in blue, and there is a traffic jam 400 between the first intersection 310 and the second intersection 320, the second determination is performed. In the road section before the intersection 320, it is determined that the lane change to the traveling direction side should be performed. In the example of the figure, in order to make a right turn at the first intersection 310, the guidance determination unit 210 determines that the course direction to the right lane or the center lane should be determined, and according to the determination result, for example, “to the center lane” A guidance 410 such as “Change to straight direction” is output. If the own vehicle M passes the second intersection 320 in the left lane, it is very difficult to move to the right turn lane F due to the traffic jam 400 before the first intersection 310. On the other hand, if the own vehicle M passes the second intersection 320 in the center lane, the vehicle M can be easily moved to the right turn lane F as compared with the lane change from the left lane.

  FIG. 9 is an example of lane keeping guidance when there is a second traffic jam in the fourth embodiment. When the guidance determination unit 210 determines that the vehicle stops at the second intersection 320, and there is a traffic jam 420 on the route change side before the second intersection 320, the road before the second intersection 320 In the section, it is determined that the lane should be maintained, and a guidance 430, for example, “Please maintain the lane” is output based on the determination result. Further, the guidance determination unit 210 determines that the lane should be changed after passing through the second intersection 320, and a guidance 440 such as “This is the right direction” is output according to the determination result.

  In a further preferred aspect of the fourth embodiment, the guidance determination unit 210 determines whether or not there is a lane change according to the determination of the lane in which the traffic jam occurs and the determination of the lane in which the vehicle M is traveling. It is desirable to do. In the example of FIG. 8, when the lane in which the vehicle M is traveling is the left lane, the lane change to the central lane or the right lane is prompted. In the example of FIG. 9, the traffic jam 420 is the central lane or the right lane. In some cases it is desirable to encourage lane keeping.

  Further, for example, in the example of FIG. 8, when the own vehicle M is already traveling in the center lane or the right lane, guidance for maintaining the lane change may be output. Further, in the example of FIG. 9, when the own vehicle M is lined up in the traffic jam 420, the route is changed to the left lane so as to avoid the traffic jam 420, and after passing through the second intersection 320, the lane to the right lane A guidance prompting the change may be output.

  FIGS. 10 and 11 are examples of guidance when the traveling direction of the first intersection is a left turn in the fourth embodiment, and FIG. 10 is determined not to stop at the second intersection. FIG. 11 shows an example of guidance when there is a traffic jam, and FIG. 11 shows an example of guidance when there is a second traffic jam if it is determined that the traffic stops at the first intersection.

  The preferred embodiment of the present invention has been described in detail above, but the present invention is not limited to the specific embodiment, and various modifications can be made within the scope of the present invention described in the claims. Deformation / change is possible. In particular, the determination result after using the road traffic information is based on the manufacturer's design items, and is not limited to the determination result described in the present embodiment.

100: Navigation device 102: Location information acquisition unit 104: Traffic information acquisition unit 106: User input unit 108: Data communication unit 110: Display unit 112: Audio output unit 114: Storage unit 116: External interface (I / F) 118: Control unit 120: network 130; location information distribution site 132: road map data distribution site 134: road traffic information distribution site 136: GPS satellite 200: intersection guidance program 202: route information acquisition unit 204: intersection determination unit 206: right / left turn intersection Discriminator 208: Signal information extractor 210: Guidance determiner 212; Guidance information generator 300: Optical beacon 310: First intersection 320: Second intersection 330, 332, 334, 340: Guidance 350: Imaging camera 400: Traffic jam 410: Information 420: Traffic jam 430, 440 :guide

Claims (10)

An electronic device with a navigation function,
Receiving means for receiving road traffic information including signal information of intersections;
Extracting means for extracting signal information of a plurality of intersections existing on the route to be guided from the road traffic information received by the receiving means;
An intersection discriminating means for discriminating a first intersection that makes a right turn or a left turn on the route to be guided;
Guidance determination means for determining whether or not to change lanes in the road section before the second intersection based on the signal information of the second intersection before the first intersection determined by the intersection determination means;
Output means for outputting guidance on lane change based on the determination result of the guidance determination means;
An electronic device. The guidance determination means further includes stop determination means for determining whether to stop at the second intersection based on the signal information, and the guidance determination means determines that the stop determination means stops at the second intersection. 2. The electronic device according to claim 1, wherein when it is determined, the lane change is to be made in the road section before the second intersection. The said guidance determination means determines that it should not change a lane in the road area before the 2nd intersection, when it determines with the said stop determination means not stopping at a 2nd intersection. Electronic devices. The electronic device according to claim 3, wherein the guidance determination unit determines that the lane should be changed after the vehicle has passed the second intersection. The intersection determination means further includes a lane determination means for determining whether a right turn or a left turn lane is set at the first intersection, and the guidance determination means sets a right turn or a left turn lane by the lane determination means. The electronic device according to any one of claims 1 to 4, wherein if it is determined that the lane change is to be made in the road section before the second intersection. The road traffic information further includes traffic jam information,
The electronic device further includes a traffic jam determining means for determining whether there is a traffic jam based on the traffic jam information,
The guidance determination means determines that a lane change should be made in a road section in front of the second intersection when the congestion determination means determines that there is congestion between the first intersection and the second intersection. An electronic device according to any one of claims 1 to 5. The guidance determination means further includes second intersection lane determination means for determining whether a right turn or a left turn lane is set at the second intersection;
Vehicle lane identification means for identifying the lane in which the vehicle is traveling,
The guidance determination means changes the lane when the vehicle is not traveling on a right turn lane or a left turn lane in a road section before the second intersection by the second intersection lane determination means and the own vehicle lane identification means. The electronic device according to claim 1, wherein the electronic device is determined not to be. The road traffic information includes information on whether or not a vehicle exists in parallel with the own vehicle,
The electronic device according to claim 1, wherein the guidance determination unit determines that a lane change should not be performed when a vehicle is present in parallel with the host vehicle. An intersection guide method in an electronic device having a navigation function,
Receiving signal information of a plurality of intersections existing on the route to be guided;
Determining a first intersection to turn right or left on the route to be guided;
Determining whether or not to change the lane in the road section before the second intersection based on the signal information of the second intersection before the first intersection determined by the determining step;
Outputting guidance on lane change based on the determination result;
Guide method of intersection having An intersection guidance program executed by an electronic device having a navigation function,
Receiving signal information of a plurality of intersections existing on the route to be guided;
Determining a first intersection to turn right or left on the route to be guided;
Determining whether or not to change the lane in the road section before the second intersection based on the signal information of the second intersection before the first intersection determined by the determining step;
Outputting guidance on lane change based on the determination result;
Intersection guide program with

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