JP2012251943A - Pedestrian terminal device, computer program, and method for retrieving walking course - Google Patents

Abstract

PROBLEM TO BE SOLVED: To retrieve a walking course for enabling a pedestrian to cross a driveway to smoothly advance to a sidewalk of the opposite side.SOLUTION: A pedestrian terminal device 1 retrieves a walking course and notifies a pedestrian H of the retrieved walking course. The device 1 acquires signal information about a display time of light color of a traffic signal 13 installed ahead in an advancing direction of a sidewalk 31 on which the pedestrian H walks. The device determines a walking course whose cost needed to cross a driveway 32 and advance to a sidewalk 33 of the opposite side is a minimum. When there are at least two walking courses for crossing the driveway 32 in parallel with the sidewalk 31 with the pedestrian walking thereon to advance to the sidewalk 33 of the opposite side, a walking course is determined on the basis of the acquired signal information.

Description

  The present invention relates to a pedestrian terminal device, a computer program, and a walking route search method.

  A navigation technology that searches for a route to a destination and performs route guidance according to the searched route is known. This navigation technology is a pedestrian terminal such as a portable navigation device or a mobile phone (smart phone) possessed by a pedestrian. It is also being applied to devices (see, for example, Patent Document 1).

  In the navigation technology in this pedestrian terminal device, a route search is performed by a technique such as the Dijkstra method. In addition, the search of the walking route performed by such a pedestrian terminal device is mainly performed in a micro range from the current location to a nearby position that can be moved on foot.

JP 2009-204429 A (see FIG. 1)

According to the pedestrian terminal device as described above, a rough walking route is searched. According to this route search, a route having the minimum total distance to the destination may be set as the optimum route.
However, in the case of searching for walking routes, since the distance to the destination is relatively short, the walking route set as the optimal route includes roads with pedestrian traffic lights with long waiting times. If this is the case, the signal waiting time required to cross the road (roadway) is greatly affected, and even if the total distance to the destination is the shortest, the time to arrival is different than when other walking routes are used. Can be slow.

  Accordingly, an object of the present invention is to search for a pedestrian terminal device, a computer program, and a walking route that can search for a walking route that smoothly moves the pedestrian across the roadway to the opposite sidewalk. Provide a method.

  (1) The present invention is a pedestrian terminal device that searches a walking route and notifies a pedestrian of the searched walking route, and is a traffic signal installed in front of a sidewalk along which the pedestrian is walking. A signal information acquisition unit that acquires signal information relating to the display time of the lamp color of the light source, and at least a walking route that travels from the sidewalk where the pedestrian is walking to a sidewalk on the opposite side across a roadway parallel to the sidewalk. When there are two, the walking route that minimizes the cost required to cross the roadway and proceed to the opposite sidewalk is determined based on the signal information acquired by the signal information acquisition unit. And a route search unit.

  According to the present invention, when there are at least two walking paths that cross the roadway to the opposite sidewalk, the traffic signal is installed in front of the sidewalk along which the pedestrian is walking. On the basis of the signal information relating to the display time of the lamp color, the walking route that minimizes the cost is determined. For this reason, the pedestrian who possesses this pedestrian terminal device can smoothly proceed to the sidewalk on the opposite side across the roadway by proceeding according to the walking route that minimizes the cost.

(2) In addition, the signal information acquisition unit displays a light color display time of a pedestrian traffic light to be followed when crossing a roadway parallel to the sidewalk from a position in front of the sidewalk along which the pedestrian is walking. It is preferable to acquire the signal information regarding.
In this case, walk from the position in front of the sidewalk along which the pedestrian is walking, following the pedestrian traffic light that should be followed when crossing the roadway parallel to the sidewalk, and proceeding to the sidewalk on the opposite side A determination can be made as to whether the route has the lowest cost.

(3) Moreover, the pedestrian terminal device according to the present invention further includes a walking disturbance information acquisition unit that acquires accident information relating to a traffic accident occurrence rate, and a point where the occurrence rate based on the accident information is greater than or equal to a threshold value. When it is determined that the route is determined to be included in the walking route determined by the route search unit, the information processing unit preferably includes a notification processing unit that performs processing for notifying a pedestrian of alerting.
In this case, if the walking route determined by the route search unit includes a point where the traffic accident occurrence rate is equal to or higher than the threshold, the pedestrian terminal device notifies the pedestrian of an alert. The pedestrian can walk while paying attention to the walking route determined by the route search unit.

(4) Moreover, the pedestrian terminal device of the present invention further includes a walking disturbance information acquisition unit that acquires accident information related to a traffic accident occurrence rate, and the route search unit is configured with a cost considering the accident information. It is preferable to determine a walking route that minimizes the gait.
In this case, for example, when a point having a high incidence of traffic accidents exists in the middle of the walking route, the cost can be increased on the walking route. For this reason, a safe walking route is searched as much as possible.

(5) Moreover, the said pedestrian terminal device of this invention is a requirement further which calculates | requires the estimation required time which will be required until a pedestrian walks along a sidewalk and reaches the crossing start position which crosses the said roadway. A time measurement unit, wherein the route search unit includes the predicted required time obtained by the required time measurement unit and a remaining red light color in a pedestrian traffic light to be followed when crossing the roadway from the crossing start position. It is preferable to determine a walking route based on the signal information about time.
In this case, when the estimated time has elapsed and the pedestrian reaches the crossing start position, the remaining time of the red light color in the pedestrian traffic light to be followed when crossing the road from the crossing start position is relatively short In this case, the pedestrian preferably waits for the light color to change to blue at the crossing start position, crosses the roadway, and proceeds to the sidewalk on the opposite side, and such a walking route is searched.
In contrast, when the estimated time has elapsed and the pedestrian reaches the crossing start position, the remaining time of the red light color in the pedestrian traffic light to be followed when crossing the roadway from the crossing start position is compared. If the pedestrian path that crosses the roadway at the next crossing position ahead in the direction of travel is less costly, the pedestrian will pass the first crossing start position and leave the sidewalk as it is A walking path that travels and crosses the roadway at the next crossing position is searched.

(6) The pedestrian terminal device according to the present invention further includes a peripheral information acquisition unit that acquires peripheral information about a failure or construction of a traffic light for a pedestrian around the walking position of the pedestrian, and the route search The unit preferably determines the walking route in consideration of the peripheral information.
In this case, for example, it is possible to search for a walking route so as to avoid a road where a pedestrian traffic light is broken or a road where construction is being performed.

(7) Moreover, the computer program of this invention is a computer program for functioning a computer as a pedestrian terminal device as described in any one of said (1)-(6).
When the computer program of the present invention causes the computer to function as a pedestrian terminal device, the pedestrian is walking when there are at least two walking paths that cross the roadway and go to the opposite sidewalk. Based on the signal information regarding the display time of the light color of the traffic signal installed in front of the direction of travel of the sidewalk, the walking route with the minimum cost is determined. For this reason, the pedestrian can proceed smoothly to the opposite sidewalk across the roadway by proceeding according to the walking route that minimizes the cost.

  (8) Moreover, this invention is the search method of the walk route performed by the pedestrian terminal device, Comprising: The display time of the light color of the traffic signal installed ahead of the advancing direction of the sidewalk where the pedestrian is walking If there are at least two walking routes that go to the opposite sidewalk from the sidewalk on which the pedestrian is walking, crossing the roadway parallel to the sidewalk, A walking route that minimizes the cost required to cross the road to the opposite sidewalk is determined based on the acquired signal information.

  According to the present invention, when there are at least two walking paths that cross the roadway to the opposite sidewalk, the traffic signal is installed in front of the sidewalk along which the pedestrian is walking. On the basis of the signal information relating to the display time of the lamp color, the walking route that minimizes the cost is determined. For this reason, the pedestrian who possesses this pedestrian terminal device can proceed smoothly to the opposite sidewalk across the roadway by proceeding according to the walking route that minimizes the cost.

  According to the present invention, when there are at least two walking paths that cross the roadway and go to the opposite sidewalk, the pedestrian crosses the roadway by following the determined walking path. You can go smoothly to the other sidewalk.

It is a block diagram which shows one Embodiment of the pedestrian terminal device of this invention. It is explanatory drawing explaining the road where the pedestrian is walking. It is a flowchart explaining the search method of a walking route. It is explanatory drawing of a walk route. It is explanatory drawing of the pedestrian terminal device which alert | reports alerting with respect to a pedestrian. It is explanatory drawing explaining another road where the pedestrian is walking.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
[Overall configuration of pedestrian terminal]
FIG. 1 is a block diagram showing an embodiment of a pedestrian terminal device 1 according to the present invention. This pedestrian terminal device 1 is a device possessed by a pedestrian, measures the position of itself (a pedestrian carrying the pedestrian terminal device 1), and based on position information obtained by positioning. The user's own position (current position) on the map can be estimated, and a walking route from his / her position to the destination can be searched. And the pedestrian terminal device 1 can guide a pedestrian by alert | reporting the searched walking route with respect to the pedestrian who is carrying the said pedestrian terminal device 1 at the time of a walk.

  The pedestrian terminal device 1 measures a central processing unit 2 that executes various processes for searching a walking route, an input unit 3 that is operated by a pedestrian to input information, and measures its own position (current position). A location information acquisition unit 4 that acquires location information about the location, a storage device 5 that stores map information (map data), a computer program, and the like, and a communication unit of a roadside device (infrastructure device) 10 installed on a road 11 includes a communication unit 6 that performs wireless communication with the mobile phone 11 and an output unit 7 that outputs information on route guidance. The processing of the central processing unit 2 includes communication control.

  The pedestrian terminal device 1 according to the present embodiment includes a mobile phone (smartphone) having a function as a computer, and a computer program for causing the mobile phone to function as a device for performing a route search is installed in the mobile phone. Consists of. Note that the pedestrian terminal device 1 may be a portable navigation device having a function as a computer.

Each of the functional units described later included in the central processing unit 2 is exhibited when the computer program is executed by the central processing unit 2. That is, this computer program is for causing a mobile phone (smart phone) having a function as a computer to function as the pedestrian terminal device 1.
The computer program can be sold and transferred by being downloaded to the pedestrian terminal device 1 from a server in which the computer program is stored so as to be downloadable via a network. The computer program may be stored in a recording medium such as a CD-ROM or DVD-ROM, and sold or transferred. Each functional unit of the central processing unit 2 will be described later.

The output unit 7 includes a display 7a and a speaker 7b, and the display 7a outputs information on route guidance as an image. As information regarding this route guidance, there are a road map in the vicinity, a walking route searched by the central processing unit 2, information on alerting described later, and the like.
Further, the speaker 7b outputs information on route guidance and the like as sound. As information regarding this route guidance, there are walking routes searched by the central processing unit 2, information on alerting to be described later, and the like.

  The input unit 3 includes an operation device that functions as a user interface for a pedestrian. In the present embodiment, the input unit 3 is a touch panel device using the display 7a. When the pedestrian operates the input unit 3, various information such as a destination for searching for a walking route is input to the central processing unit 2 through the input unit 3. The input unit 3 may be a button provided separately from the display 7a (touch panel device).

Further, in order to execute a search for a walking route by the function of the central processing unit 2, the pedestrian inputs the search conditions through the input unit 3. As search conditions, distance priority gives priority to distance over time so that the distance to the destination is minimized, time priority gives priority to time over distance so as to minimize time to the destination, and There is a gradient priority that minimizes the gradient to the destination. The input unit 3 selects one of distance priority, time priority, gradient priority, and the like.
Note that these three search methods may be combined, or route search conditions other than these three search methods may be selected.

  The position information acquisition unit 4 has, for example, a GPS positioning unit, and the GPS positioning unit receives a radio wave from a GPS satellite and measures its own position (current position). The position information acquisition unit 4 includes an azimuth sensor and an acceleration sensor, and has a self-contained navigation function that detects a walking direction and a walking distance based on outputs of these sensors and estimates its own position. May be. The position information acquisition unit 4 generates position information about the position of the measured position, and gives this position information to the central processing unit 2.

  The storage device 5 includes a memory such as a ROM, a RAM, and a hard disk, and stores map information and the like in addition to the computer program. Based on the current position acquired by the position information acquisition unit 4 (the position information), the current position and the surrounding map (map information) are displayed on the display 7a, and route guidance is provided to pedestrians. The

  The communication unit 6 has a narrow area communication function for performing communication with the communication unit 11 of the roadside device 10. This narrow area communication function uses, for example, a frequency band used in road-to-vehicle communication in which an in-vehicle device (not shown) mounted on a vehicle as an ITS (road traffic information communication system) communicates with the roadside device 10. Communication function. Thereby, the pedestrian terminal device 1 can receive the information from the roadside device 10 through the communication unit 6. In addition, when the pedestrian terminal device 1 is a mobile phone (smartphone), the communication unit 6 also has a wide area communication function for causing it to function as a mobile phone, and the roadside device 10 is used by using this wide area communication function. Information (such as signal information described later) may be received.

  FIG. 2 is an explanatory diagram for explaining a road on which a pedestrian carrying the pedestrian terminal device 1 is walking. The roadside device 10 can communicate with a signal controller 12 that controls a traffic signal 13 installed on a road. Since the signal controller 12 controls the change in the lamp color of the traffic signal 13, the roadside apparatus 10 can acquire signal information related to the lamp color display time. The signal information related to the lamp color display time includes signal display information about the current lamp color (lamp color type) and information about the remaining time of the lamp color (or the duration of the lamp color). Information). Moreover, the information about the cycle of the lamp color change may be included.

The roadside device 10 can communicate with a central management device (central computer) of a traffic control center (not shown) included in the ITS. In the central management device, information on the occurrence of traffic accidents on the roads in the management area and the points of occurrence are collected, and information on the incidence of traffic accidents at each point (accident information) is accumulated. .
In addition, the central management device collects information on the failure of traffic lights (pedestrian traffic lights and vehicle traffic lights) on roads in the management area, information on road construction, etc., and accumulates such infrastructure information. ing.

  The roadside device 10 can acquire accident information and infrastructure information from the central management device, and can transmit the signal information, accident information, and infrastructure information from the communication unit 11. The pedestrian terminal device 1 existing in the communication area of the communication unit 11 can receive the information by the communication unit 6.

[About each functional unit of the central processing unit 2]
In FIG. 1, the central processing unit 2 includes a route search unit 21, a signal information acquisition unit 22, a walking disturbance information acquisition unit 23, a notification processing unit 24, a required time measurement unit 25, and a surrounding information acquisition unit 26 as functional units. Have.

The route search unit 21 walks to the destination based on the location information about the location (current location) acquired by the location information acquisition unit 4 and the destination information input by the input unit 3. Search for a route.
As a route search algorithm, for example, the Dijkstra method is used, and a walking route with a minimum cost is determined. The cost is set according to the distance and time between the links. If distance priority is set as a search condition for the walking path, the walking path that minimizes the link cost related to the distance is determined. On the other hand, if time priority is set as a search condition, a walking route that minimizes the link cost related to time is determined. Alternatively, if gradient priority is set as a search condition, a walking route that minimizes the link cost related to a road gradient drop is determined.
In the present embodiment, a case where a destination is set and time priority is set as a search condition will be described.

  Before describing each functional unit, a road on which a pedestrian carrying the pedestrian terminal device 1 walks will be described with reference to FIG. The road R includes a roadway 32 and sidewalks 31 and 33 on both sides parallel to the roadway. The pedestrian H has the pedestrian terminal device 1 in which the destination G is set, and is walking on the one sidewalk 31 according to the walking route searched by the pedestrian terminal device 1.

  In the middle of the pedestrian H heading to the destination G, a pedestrian crossing 34 for the pedestrian H to cross the roadway 32 is provided on the front side in the traveling direction. And the pedestrian traffic lights 15a and 15b which the pedestrian who walks this pedestrian crossing 34 should follow, and the vehicle traffic signal which the vehicles which should stop at the stop line 35 provided before this pedestrian crossing 34 should follow. 14 is provided. These pedestrian traffic lights 15a and 15b and the vehicle traffic signal 14 are collectively referred to as a traffic traffic signal 13.

  The pedestrian traffic light 15a is a traffic signal to be followed when crossing the roadway 32 parallel to the sidewalk 31 from the position P1 ahead of the sidewalk 31 in which the pedestrian H is walking. In the present embodiment, a pedestrian bridge 36 is provided between the pedestrian crossing 34 and the destination G. Note that the map information stored in the storage device 5 may include information on the arrangement of the traffic signal 13 and the pedestrian bridge 36 in addition to the information on the road R.

  The signal controller 12 and the roadside device 10 for controlling the traffic signal 13 are installed in the vicinity of the traffic signal 13, and information on the arrangement of the traffic signal 13 and the traffic signal 13 are provided from the roadside device 10. Signal information related to the display time of the lamp color is wirelessly transmitted to the surroundings. Since the signal information is updated every moment, the roadside apparatus 10 transmits the latest signal information that is updated.

  The signal information acquisition unit 22 will be described. The signal information acquisition unit 22 of the pedestrian terminal device 1 possessed by the pedestrian H acquires the signal information of the traffic signal device 13 installed in the forward direction of the sidewalk 31 from the roadside device 10 through the communication unit 6. To do. In particular, the signal information acquired by the signal information acquisition unit 22 is at least signal information related to the display time of the lamp color of the pedestrian traffic light 15a. For example, when the pedestrian traffic light 15a has a red light color, the signal information acquisition unit 22 acquires signal display information indicating that it is a red light color and information on the remaining time that is red. .

  In addition, the area | region which receives and acquires this signal information is an area | region before the advancing direction rather than the area | region where the pedestrian H crosses the roadway 32. FIG. That is, the pedestrian terminal device 1 of the pedestrian H who is walking on the sidewalk 31 toward the destination G reaches the crossing start position (the position P1) of the pedestrian crossing 34 where the pedestrian traffic light 15a is installed. Signal information about the pedestrian traffic light 15a is received and acquired in advance at a position before the traveling direction (at a time before reaching).

The required time measuring unit 25 starts from the current position S based on the position information about the own position (current position S) acquired by the position information acquiring unit 4 and the map information stored in the storage device 5. The distance to the crossing start position that crosses the roadway 32 can be obtained.
In the present embodiment, since a pedestrian bridge 36 is provided in addition to the pedestrian crossing 34 to cross the roadway 32, the position is set as the crossing start position for crossing the roadway 32 in the forward direction of travel. In addition to P1, there is a position P2. Therefore, the required time measuring unit 25 obtains the distance from the current position S to the position P1 and the distance to the position P2 that is further ahead. The position P2 is a crossing start position that crosses the roadway 32 across the pedestrian bridge 36.

And the walking speed of the pedestrian H is calculated | required by the acceleration sensor which the positional information acquisition part 4 has. Therefore, the required time measuring unit 25 performs calculation based on the distance to the crossing start position (position P1) and the walking speed of the pedestrian H, and the pedestrian H walks along the sidewalk 31 from the current position S. Thus, the estimated required time required to reach the crossing start position (position P1) that crosses the roadway 32 along the pedestrian crossing 34 is obtained.
Further, the required time measuring unit 25 performs a calculation based on the distance to the first crossing start position (position P2) and the walking speed of the pedestrian H, and the pedestrian H follows the sidewalk 31 from the current position S. The estimated required time that will be required to reach the second crossing start position (position P2) is obtained.

  The walking disturbance information acquisition unit 23 will be described. When a traffic accident has occurred in the past in the pedestrian crossing 34 shown in FIG. 2 and the area in the vicinity thereof, information on the accident is accumulated in a central management device (not shown) of the traffic control center. A traffic accident occurrence rate is obtained as accident information, and this occurrence rate can be obtained, for example, by the number of traffic accidents with respect to the number of vehicles on the road.

  The accident information related to the occurrence rate is transmitted from the central management device to the roadside device 10, and the walking disturbance information acquisition unit 23 of the pedestrian terminal device 1 transmits the accident information transmitted from the roadside device 10 through the communication unit 6. get. As will be described later, the route search unit 21 can determine the walking route with the lowest cost in consideration of the accident information.

  The notification processing unit 24 has a function of comparing the occurrence rate based on the accident information acquired by the walking disturbance information acquisition unit 23 with a threshold set in advance in the notification processing unit 24. Further, the notification processing unit 24 has a function of determining whether or not a point where the occurrence rate is equal to or higher than the threshold is included in the walking route determined by the route search unit 21. Then, when it is determined that a point where the occurrence rate is equal to or greater than the threshold is included in the determined walking route, the notification processing unit 24 performs a process for notifying the pedestrian of alerting. .

  For example, the display 7a may include a road map including a walking route on the display 7a, or a road ahead of the pedestrian H in the traveling direction. Meaning information is displayed as an image. In addition to the display on the display 7a or separately from the display, information indicating that there are many accidents on the road ahead in the traveling direction of the pedestrian H is output from the speaker 7b by voice.

  The peripheral information acquisition unit 26 will be described. For example, when the pedestrian traffic light 15a shown in FIG. 2 is out of order, the information is stored in a central management device (not shown) of the traffic control center. The infrastructure information regarding this failure is transmitted from the central management apparatus to the roadside apparatus 10. And the surrounding information acquisition part 26 of the pedestrian terminal device 1 acquires the said infrastructure information transmitted from the roadside apparatus 10 through the communication part 6 as surrounding information. Then, the route search unit 21 may determine the walking route in consideration of this peripheral information. For example, the route search unit 21 searches for a walking route that does not pass the pedestrian crossing 34 that crosses the roadway 32 in accordance with the pedestrian traffic light 15a.

[Walking route search method]
A walking route search method executed by the pedestrian terminal device 1 having the above configuration will be described. FIG. 3 is a flowchart for explaining a walking route search method.
In FIG. 2, the pedestrian H inputs the destination G to the pedestrian terminal device 1 by the input unit 3 at the current position S (step S1 in FIG. 3). The position information acquisition unit 4 acquires position information about its own position (current position S) (step S11).

  Furthermore, at the current position S, the signal information acquisition unit 22 crosses the roadway 32 parallel to the sidewalk 31 from the position P1 in the traveling direction of the sidewalk 31 where the pedestrian H is walking from the roadside device 10. Signal information relating to the display time of the lamp color of the pedestrian traffic light 15a to be obeyed is acquired (step S21).

  When the destination G is input to the pedestrian terminal device 1 by the input unit 3 (step S1), the required time measurement unit 25 will be required to reach the crossing start position (position P1) as described above. A predicted required time and a predicted required time required to reach the crossing start position (position P2) are obtained (step S2).

  And the route search part 21 searches the walk route to the destination G based on the acquired said positional information and the information of the input destination G (step S3). A specific example of searching for walking routes will be described. As a walking route from the current position S to the destination G, there are candidates for the route K1 and the route K2, as shown in FIG. FIG. 4 is an explanatory diagram showing a simplified version of FIG. 2, and information shown on either the left or right side of FIG. 4 is displayed on the display 7 a of the pedestrian terminal device 1.

  The route K1 is a walking route from the front position P1 to the destination G via the sidewalk 33 on the opposite side after walking on the pedestrian crossing 34. The route K2 is a walking route that is different from the first position P1 ahead of the traveling direction and travels from the second position P2 that is further forward in the traveling direction to the destination G through the sidewalk 33 on the opposite side across the footbridge 36. . In this way, there are two walking paths that cross the roadway 32 from the sidewalk 31 on which the pedestrian H is walking and proceed to the destination G via the sidewalk 33 on the opposite side.

  In this case, in step S3 of FIG. 3, the route search unit 21 determines a walking route that minimizes the cost required to cross the roadway 32 and proceed to the destination G via the opposite sidewalk 33. This determination is based on the signal information regarding the display time of the light color of the pedestrian traffic light 15a acquired in step S21 of FIG. 3 in addition to the position information about the current position S and the input destination G information. Done.

  Here, the difference in cost (required time) between the route K1 and the route K2 in FIG. 4 will be described. When the light color of the pedestrian traffic light 15a is red, a signal waiting time occurs in the route K1, but the signal waiting time is not required in the route K2. In addition, time is required for going up the pedestrian bridge 36 on the route K2, but such time is not required on the route K1.

In addition, in the route K1, if the pedestrian traffic light 15a is blue when the pedestrian H reaches the position P1, the vehicle reaches the destination G without stopping by crossing the pedestrian crossing 34. Is possible. In this case, for example, it is assumed that the required time (total cost) from the current position S to the destination G is 15 minutes. The required time of the route K1 is a time that changes because it is affected by the waiting time of the pedestrian traffic light 15a, but the required time (15 minutes) is the shortest required time of the route K1. It should be noted that the period of change in the lamp color of the pedestrian traffic light 15a is 2 minutes.
On the other hand, according to the route K2, it is possible to reach the destination G without stopping by crossing the pedestrian bridge 36. In this case, for example, the required time from the current position S to the destination G ( Assume that the total cost is 16 minutes. The time required for the route K2 is a fixed time because it is not affected by the waiting time of the pedestrian traffic light 15a.

Therefore, in the state where the pedestrian H is present at the current position S, the pedestrian terminal device 1 obtains the estimated required time (step S2) and the signal information (step S21), so the route search When the pedestrian H reaches the front position P1, the unit 21 can predict the light color of the pedestrian traffic light 15a.
For example, even if the light color of the pedestrian traffic light 15a is red at the present time, if it is calculated based on the signal information, at the position P1 where the pedestrian H has arrived after the estimated required time has elapsed, the pedestrian traffic light 15a It can be predicted that the light color of the traffic light 15a is blue.
In this case, the route search unit 21 determines the route K1 as the optimum route because the total cost related to time is smaller in the route K1 (15 minutes) than in the route K2 (16 minutes).

  On the other hand, at the position P1 where the pedestrian H has reached after the estimated required time has elapsed, the route search unit 21 predicts that the light color of the pedestrian traffic light 15a is red, Moreover, when the calculation is based on the signal information and the remaining red time is relatively long and the required time for the route K1 (16 minutes) is longer than the required time for the route K2 (16 minutes), the route is longer. If the search unit 21 determines, the route K2 is determined as the optimum route because the total cost related to time is smaller in the route K2 than in the route K1. That is, the pedestrian H passes the first crossing start position P1 and proceeds on the sidewalk 31 as it is, and a route K2 that crosses the roadway 32 is searched by the pedestrian bridge 36 that is the next crossing position.

  However, the route search unit 21 determines that the remaining red time is relatively short and the shortest required time of the route K1 (assuming 15 minutes 30 seconds) is shorter than the required time of the route K2 (16 minutes). In this case, the route search unit 21 determines the route K1 as the optimum route because the sum of the costs regarding the time of the route K1 is equal to or less than the route K2. In other words, the pedestrian H waits for the light color to change to blue at the position P1, crosses the roadway 32, and proceeds to the sidewalk 33 on the opposite side.

Further, there is no difference between the required time of the route K2 (16 minutes) and the shortest required time of the route K1 (16 minutes) due to the remaining time of red (0 minutes), or the absolute value of the above difference is a predetermined period (assuming 30 When the route search unit 21 determines that the time is equal to or less than (seconds), the route search unit 21 makes the total sum of costs regarding the time of the route K1 equal to the route K2. In this case, the route may be determined according to the second priority item. For example, when the gradient priority is the second priority item, the cost for the second priority item is lower on the route K1 crossing the pedestrian crossing 34 than on the route K2 crossing the pedestrian bridge 36. In other words, the pedestrian H waits for the light color to change to blue at the position P1, crosses the roadway 32, and proceeds to the sidewalk 33 on the opposite side.
If it is considered that there is no significant difference between the costs of K1 and K2 from any viewpoint such as distance priority and time priority, the pedestrian H is guided to cross the pedestrian crossing 34 as early as possible. It is desirable. This is because the prediction result of the route search unit 21 may be greatly distorted due to a change in the walking speed of the pedestrian H or a change in the behavior of the pedestrian H due to other factors.

  As described above, the route search unit 21 calculates the predicted required time obtained by the required time measuring unit 25 in step S2 and the red light color of the pedestrian traffic light 15a to be followed when crossing the roadway 32 from the crossing start position P1. Based on the signal information about the remaining time, an optimal walking route is determined. Then, the map information around the current position S is displayed on the display 7a together with the determined optimal walking route (step S4 in FIG. 3).

In addition, as described above, the walking disturbance information acquisition unit 23 acquires accident information related to the incidence of traffic accidents (step S31). Therefore, in step S3, the route search unit 21 may determine the walking route with the minimum cost in consideration of the acquired accident information.
For this reason, the route search unit 21 has a function of resetting the cost of each link, and can set the cost of a link having a high accident occurrence rate high based on the accident information. In this case, for example, even if one of the routes (route K1) has a smaller total cost than the other route (route K2) among the routes K1 and K2, this one route. (Link K1) includes a link with a high accident occurrence rate, so that the cost increases, and the other route (route K2) can be determined as the optimum route.

In this case, if there is a point with a high incidence of traffic accidents in the middle of one of the candidate walking routes, the cost of that one walking route is high, and other walking routes are In some cases, priority is given and a walking route that is as safe as possible is searched.
For example, in FIG. 2, when the incidence of a traffic accident is high at the pedestrian crossing 34, the cost of the route K1 in FIG. 4 is higher than the cost of the route K2, and the route K2 is selected.

  Moreover, in the pedestrian terminal device 1 according to the present embodiment, since the accident information related to the traffic accident occurrence rate is acquired by the walking disturbance information acquisition unit 23 (step S31), the notification processing unit 24 determines the occurrence rate. If it is determined that a point that is equal to or greater than the threshold is included in the determined walking route, a process for notifying the pedestrian H of alerting is performed (step S5).

For example, when the route K1 is determined as the optimum route by the route search unit 21 and the traffic accident occurrence rate in the pedestrian crossing 34 is equal to or greater than the threshold value, as shown in FIG. Along with the map information around the position S and the determined optimal walking route, information indicating that traffic accidents frequently occur on the pedestrian crossing 34 is displayed. As a result, the pedestrian H can walk while paying attention to the determined route K1.
The roadside device 10 may also transmit to the pedestrian terminal device 1 not only the accident information but also infrastructure information such as road construction information and traffic signal failure that may interfere with walking other than the accident information. . And the pedestrian terminal device 1 may perform the process for alert | reporting alerting with respect to a pedestrian, when this infrastructure information is received (the walk obstruction information acquisition part 23).

According to the pedestrian terminal device 1 according to the above-described embodiment, the waiting time of the pedestrian traffic light 15a to be followed when crossing the roadway 32 from the position P1 ahead in the traveling direction according to the walking speed of the pedestrian H. Even if there are two walking paths that cross the roadway 32 and proceed to the destination G through the opposite sidewalk 33, a preferable walking path, that is, a walking path that minimizes cost is determined in advance. Is done.
For this reason, the pedestrian H who has this pedestrian terminal device 1 proceeds smoothly according to the walking path that minimizes the cost, so that the pedestrian H smoothly proceeds to the destination G across the roadway 32 through the opposite sidewalk. be able to. Moreover, useless running to the position P1 becomes unnecessary, and unsafe behavior by the pedestrian H is suppressed.

  In addition, the pedestrian terminal device 1 according to the present embodiment uses the traffic signal 13 installed in front of the moving direction and the traffic signal signal information within a predetermined range from the current position of the pedestrian terminal device 1 for route search. Use. For example, as shown in FIG. 2, a pedestrian traffic light (traffic signal) 17 is installed behind the pedestrian H, and the pedestrian traffic light 17 is within a predetermined range from the current position of the pedestrian terminal device 1. When installed outside, the pedestrian terminal device 1 does not use the signal information of the pedestrian traffic light 17 for route search even if the signal information of the pedestrian traffic light 17 is wirelessly transmitted.

  However, when the pedestrian traffic light 17 is installed within a predetermined range from the current position of the pedestrian terminal device 1, the pedestrian terminal device 1 uses the signal information of the pedestrian traffic signal 17 for route search. In this way, when a route search is performed immediately after a pedestrian passes a certain intersection, it is possible to perform a route search considering the traffic signal information of the intersection that has passed, thus eliminating unnecessary search conditions. On the other hand, it is possible to increase the possibility of searching for the optimum route from the current position of the pedestrian to the destination.

  For this reason, the signal information to be transmitted includes identification information that can identify the pedestrian traffic light. As this identification information, for example, information on the position (latitude, longitude) of the pedestrian traffic light is included. If the pedestrian terminal device 1 receives this identification information, the pedestrian terminal device 1 can determine whether or not it is signal information about a pedestrian traffic light installed ahead of the traveling direction. Become. For this reason, even if the signal information about the pedestrian traffic light installed behind is received, it is possible to process the signal information not to be used for route search.

  Moreover, although the case of the straight road R was demonstrated in FIG. 2, the form of a road is not restricted to this, For example, the road containing the intersection J1 may be sufficient as shown in FIG. Also in this case, the signal information acquisition unit 22 of the pedestrian terminal device 1 is a traffic signal installed at the intersection where the roadways 32 and 37 intersect in front of the traveling direction of the sidewalk 31 on which the pedestrian H is walking. Signal information relating to the lamp color display time of 13 (especially pedestrian traffic light 15a) is acquired.

  In this case, as a walking path candidate for reaching the destination G from the current position S, the sidewalk 31 on which the pedestrian H is walking is moved to the carriageway 32 and the sidewalk 31 that are parallel to the sidewalk 31. There are at least two walking paths that cross both of the intersecting roadways 37 and proceed to the destination G via the opposite sidewalk 33. That is, after crossing the roadway 32 and crossing the roadway 37 and passing through the intersection J0 (the solid line in FIG. 6), after crossing the roadway 37 and crossing the roadway 32 and passing through the intersection J0. There is a second path (broken line in FIG. 6).

In this case, the route search unit 21 determines a walking route that minimizes the cost required to travel to the destination G through the opposite sidewalk 33 across the roadways 32 and 37, and the signal information acquisition unit 22. Is determined based on the acquired signal information. As a result, the pedestrian H does not need to run vainly and unsafe behavior by the pedestrian H is suppressed.
In the route that passes through this intersection J0, the intersecting roadway will be crossed twice, but depending on the form of the intersection (for example, in the case of 5 or 6 differences), the number of intersecting roadways is more than twice. Will be crossed. That is, when crossing an intersection, it is necessary to cross the intersecting road at least twice.

Moreover, the walk route which the pedestrian H walks from the sidewalk and crosses the roadway to the destination through the opposite sidewalk is not limited to two, and may be three or more, at least two It only has to exist.
The above-described embodiments are all illustrative and do not limit the scope of the present invention. The scope of the present invention is shown not by the above embodiment but by the scope of claims for patent, and includes modifications within the scope equivalent to the configurations of the scope of claims for patent.

  1: pedestrian terminal device 2: central processing unit 13: traffic signal 15a, 15b: pedestrian traffic light 21: route search unit 22: signal information acquisition unit 23: walking disturbance information acquisition unit 24: Information processing unit, 25: time required measurement unit, 26: peripheral information acquisition unit, 31: sidewalk, 32: roadway, 33: sidewalk, H: pedestrian, K1, K2: route

Claims (8)

A pedestrian terminal device that searches a walking route and notifies a pedestrian of the searched walking route,
A signal information acquisition unit that acquires signal information related to the display time of the light color of the traffic light installed in front of the direction of travel of the sidewalk on which the pedestrian is walking;
If there are at least two walking paths that go from the sidewalk on which the pedestrian is walking to the opposite sidewalk across the roadway parallel to the sidewalk, cross the roadway and the opposite side A route search unit that determines a walking route that minimizes the cost required to proceed to the sidewalk based on the signal information acquired by the signal information acquisition unit;
A pedestrian terminal device comprising:   The signal information acquisition unit acquires signal information related to the display time of the pedestrian traffic light to be followed when crossing a roadway parallel to the sidewalk from a position in front of the sidewalk along which the pedestrian is walking. The pedestrian terminal device according to claim 1. A walking disturbance information acquisition unit that acquires accident information on the incidence of traffic accidents;
If it is determined that a point where the occurrence rate based on the accident information is equal to or greater than a threshold is included in the walking route determined by the route search unit, a process for notifying a pedestrian of alerting is performed. A notification processing unit to perform;
The pedestrian terminal device according to claim 1, comprising: A walking obstruction information acquisition unit that acquires accident information related to the incidence of traffic accidents,
The pedestrian terminal device according to any one of claims 1 to 3, wherein the route search unit determines a walking route having a minimum cost in consideration of the accident information. A time measurement unit for obtaining a predicted time required for a pedestrian to walk along a sidewalk and reach a crossing start position crossing the roadway;
The route search unit includes the signal information about the estimated required time obtained by the required time measurement unit and the remaining time of red light in a pedestrian traffic light to be followed when crossing the roadway from the crossing start position. The pedestrian terminal device according to any one of claims 1 to 4, wherein a walking route is determined based on: A peripheral information acquisition unit for acquiring peripheral information about failure or construction of pedestrian traffic lights around the walking position of the pedestrian,
The pedestrian terminal device according to any one of claims 1 to 5, wherein the route search unit determines a walking route in consideration of the peripheral information.   The computer program for functioning a computer as a pedestrian terminal device as described in any one of Claims 1-6. A method for searching a walking route performed by a pedestrian terminal device,
Obtain signal information about the display time of the light color of traffic lights installed in front of the direction of travel on the sidewalk where pedestrians are walking,
If there are at least two walking paths that go from the sidewalk on which the pedestrian is walking to the opposite sidewalk across the roadway parallel to the sidewalk, cross the roadway and the opposite side A walking route search method comprising: determining a walking route that minimizes the cost required to proceed to the sidewalk based on the acquired signal information.

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