JP2023128135A - route guidance system - Google Patents

Abstract

To provide a route guidance system capable of guiding a user to a safe route where the user is unlikely to be involved in a crime, and appropriately managing information used for evaluating the safety of the route by sequentially updating it.SOLUTION: A route guidance system 1 includes a web server 2 connected to a user terminal 9 and external servers 10a and 10b via an Internet network 11, and an external storage device 3. The web server 2 includes a processing device 4, a communication device 5, a ROM 6, a RAM 7, and an input device 8. The processing device 4 includes route guidance means 4a, information management means 4b, and calculation means 4c. In the external storage device 3, a streetlight information database 3a, a streetlight installation information database 3b, a crime/accident information database 3c, a store information database 3d, a camera installation information database 3e, a map information database 3f, and a user information database 3g are constructed.SELECTED DRAWING: Figure 1

Description

The present invention relates to a system that guides users to safe routes that are unlikely to be involved in crime, and is particularly based on information about streetlights held by electric power companies and information about the number of crimes held by police, etc. The present invention relates to a route guidance system that proposes safe routes to users.

2. Description of the Related Art Navigation devices installed in automobiles are known as devices that provide route guidance to a user's destination. In general, such navigation devices search for the cheapest route, the shortest travel time, etc. based on information about the type of road, such as an expressway or motorway, and information about the degree of road congestion. The system displays the results on a display to suggest the user's desired route. However, conventional navigation devices have a problem in that, although they take into account information about the type of road and the degree of traffic congestion when searching for a route, they do not take safety against crime into account.

To address such issues, for example, Patent Document 1 discloses an invention related to a technology for guiding a highly safe route under the name "Information processing device, information processing method, and information processing program." .
The invention related to the information processing device disclosed in Patent Document 1 includes: a determining unit that determines a position related to a moving object based on information regarding a point where a user gets on the moving object or a point where the user gets off the moving object; and this determining section. The present invention is characterized by having a presentation unit that presents information indicating the position determined by the user to the user.
According to the information processing device configured in this way, it is possible to allow a user to use a mobile object while taking into account crime prevention and security.

Furthermore, Patent Document 2 discloses an invention related to a system that provides route guidance to cars and pedestrians using computerized map data under the name "Route guidance system, route guidance method, and computer program." has been done.
The invention related to the route guidance system disclosed in Patent Document 2 includes: a current location acquisition unit that acquires information representing the current location of a user; a start/end point acquisition unit that acquires a departure point and a destination; A route search unit that searches for a highly safe route from a destination to a destination, and a route search unit that provides route guidance to the user and, if the current location is in an unsafe location, a notification that the location is an unsafe location. The present invention is characterized by comprising a guide section that presents information to the user.
According to the route guidance system configured in this way, the guidance section not only provides guidance to the user on a highly safe route, but also provides safe route guidance when the user's current location is in a less safe location. Since the user is shown that the location is a place with low safety, it is possible to provide guidance on a highly safe route and to alert the user to the location with low safety.

Further, Patent Document 3 discloses an invention related to a technique for searching for a safe route, etc. under the name "Navigation device, navigation method, and program."
The invention related to the navigation device disclosed in Patent Document 3 includes a map information storage section in which information (map information) about roads indicated by a map is stored, and information related to safety against crime on the roads indicated by the map information (safety a safety information storage unit that stores information), a reception unit that receives information indicating the current location (current location information), and a safety information storage unit that receives information indicating the current location (current location information), and a safe route or unsafe route related to the current location indicated by the current location information using road information and safety information. It is characterized by comprising a search section that searches for a route, and an output section that outputs an output according to the search result by the search section.
According to the navigation device configured in this way, it is possible to search for safe routes and unsafe routes against crime.

Japanese Patent Application Publication No. 2020-30497 Japanese Patent Application Publication No. 2014-20989 Japanese Patent Application Publication No. 2012-189462

In the invention related to the information processing device disclosed in Patent Document 1, when determining a travel route, a logic is used that determines that the route with more streetlights is brighter and therefore safer. It is difficult to accurately evaluate the brightness of the route only by Furthermore, since the only way to determine whether there are streetlights is to conduct a field survey, there was a problem in that information regarding streetlights could not be managed appropriately.
In addition, in the invention related to the route guidance system disclosed in Patent Document 2, regarding information used for route search, places where the distance between well-lit facilities such as street lights and shops facing the street are at least a predetermined distance are identified as " However, it is difficult to judge the brightness of the target route based on the distance between streetlights and illuminated facilities, so it is difficult to judge the safety of the user. There was a problem in that it was not possible to accurately alert people to areas with low temperatures.
Furthermore, in the invention related to the navigation device disclosed in Patent Document 3, the safety information considered when searching for a safe route includes brightness information, which is information indicating the nighttime brightness of the road indicated by the map information. However, since the current or latest brightness information is obtained using illumination meters installed on roads, etc., it takes a huge amount of time to update the brightness information to the latest one and manage it appropriately. It is necessary to install a sufficient number of illumination meters. Therefore, in this invention, there was a problem that maintenance costs were high.
The present invention was made in response to these problems, and provides guidance to users on safe routes that are unlikely to be involved in crime, as well as sequentially updating information used to evaluate route safety. The purpose is to provide a route guidance system that can be appropriately managed.

In order to achieve the above object, a first invention is a route guidance system that proposes to a user a safe route that is unlikely to be involved in crime to a user terminal connected to the Internet, the system The web server is equipped with a web server connected to the Internet, and a storage device connected to the web server and in which a street light information database is constructed. The means searches for a plurality of routes connecting a departure point and a destination inputted from a user terminal, and searches for a first route for a plurality of routes based on the type and number of streetlights for each route read from a streetlight installation information database. The present invention is characterized in that ranking is performed, and the result of the first ranking is transmitted to the user terminal via a communication device together with route data regarding a plurality of routes.
The first invention has the effect that the plurality of routes obtained through the search are provided to the user of the user terminal in a state in which a priority order based on the brightness level of the streetlights is added.

In a second invention based on the first invention, the web server includes an information management means, and the information management means updates the streetlight installation information database based on the data acquired via the communication device. Features.
In addition to the effect of the first invention, the second invention has the effect that information regarding the streetlights installed on the route obtained by the search is always kept up to date.

A third invention is based on the first invention or the second invention, wherein the storage device has a crime/accident information database built therein, and the route guidance means is arranged to detect crimes for each route read from the crime/accident information database. - A second ranking is performed for multiple routes based on the number and type of accidents, and the communication device uses the results of this second ranking together with the route data regarding the multiple routes instead of the results of the first ranking. It is characterized by being transmitted to the user terminal via.
In the third invention, the plurality of routes obtained through the search are provided to the user of the user terminal with a priority order based on the number of crimes and accidents occurring and their level. .

A fourth invention is based on the first invention, wherein a camera installation information database is constructed in the storage device, and the route guidance means uses the information based on the number of security cameras installed for each route read from the camera installation information database. A third ranking is performed on the plurality of routes, and the result of the third ranking is sent to the user terminal via the communication device along with route data regarding the plurality of routes instead of the result of the first ranking. It is characterized by
In the fourth invention, the plurality of routes obtained through the search are provided to the user of the user terminal with an order of priority based on the level of security corresponding to the number of installed security cameras. It has an effect.

According to the first invention, since it is possible to accurately evaluate the brightness of a plurality of routes obtained through a search, it is possible to appropriately guide a user to a safe route that is unlikely to be involved in a crime. It is possible.

According to the second invention, in addition to the effects of the first invention, it is possible to successively update and appropriately manage the information used for evaluating the safety of the route obtained through the search.

According to the third invention, it is possible to accurately evaluate the safety of the plurality of routes obtained through the search based on the types and numbers of crimes and accidents that have occurred in the past.

According to the fourth invention, it is possible to accurately evaluate the safety of the route obtained through the search based on the number of security cameras installed.

(a) is a block diagram showing an example of the configuration of a route guidance system according to an embodiment of the present invention, and (b) is a block diagram showing an example of the configuration of the user terminal shown in FIG. 1(a). be. FIG. 2 is a diagram showing information stored in a database in an external storage device connected to a web server. (a) and (b) are block diagrams for explaining the functions of the processing device shown in FIG. 1(a). 2 is a flowchart showing the procedure of route guidance processing executed by the route guidance means shown in FIG. 1(a). 2 is a flowchart showing the procedure of database update processing executed by the information management means shown in FIG. 1(a).

The block diagram shown in FIG. 1(a) shows an example of the configuration of the route guidance system of the present invention, and the block diagram shown in FIG. 1(b) is an example of the configuration of the user terminal shown in FIG. 1(a). It shows. Furthermore, FIG. 2 is a diagram showing information stored in a database in an external storage device connected to a web server, and FIGS. 3(a) and 3(b) show the processing shown in FIG. 1(a). FIG. 2 is a block diagram for explaining the functions of the device. Furthermore, FIGS. 4 and 5 are flowcharts showing the procedure of the route guidance process executed by the route guidance means and the database update process executed by the information management means shown in FIG. 1(a), respectively.
Note that in FIG. 1(a), FIG. 2, FIG. 3(a), FIG. 3(b), and FIG. 5, "DB" is used to mean a database. Furthermore, although the data d3, d4, and d5 and the command signal a1 shown in FIG. 3(a) represent different data and signals in step S6, step S8, and step S10 shown in FIG. 4, they are used. Since the steps are different and are not used simultaneously, the same reference numerals are used for the data and signals in FIG. 3A for convenience in order to avoid complicating the diagram.

As shown in FIG. 1(a), the route guidance system 1 of the present invention is comprised of a personal computer, workstation, mainframe, etc., and is connected to a user terminal 9 and external servers 10a, 10b via a LAN (Local Area Network) or It consists of a web server 2 connected via an Internet network 11 such as a WAN (Wide Area Network), and storage such as a NAS (Network Attached Storage), and is connected to the web server 2 via a SAN (Storage Area Network). It is equipped with an external storage device 3.

The web server 2 includes a processing device 4 that performs various types of processing based on data read from an external storage device 3, a communication device 5 that sends and receives data to and from the network 11, a ROM 6, a RAM 7, a touch panel, etc. It is equipped with an input device 8 such as a keyboard.
The processing device 4 includes a route guidance device 4a that presents the user with the result of searching for a route based on information input from the user terminal 9, and an information management device that reads and writes data to and from the external storage device 3. and a calculating means 4c for performing calculations according to instructions from the information managing means 4b.
The external storage device 3 is constructed with a streetlight information database 3a, a streetlight installation information database 3b, a crime/accident information database 3c, a store information database 3d, a camera installation information database 3e, a map information database 3f, and a user information database 3g. There is.

As shown in FIG. 1(b), a user terminal 9 connected to the Internet network 11 via a communication carrier including a transmitting/receiving antenna, a wireless base station, and a switching center has a processing unit 9a and a network 11. a communication section 9b for transmitting and receiving data between; an input section 9c consisting of a touch panel or keyboard; an audio output section 9d consisting of a speaker; a display section 9e consisting of a liquid crystal display or an organic EL display; and a hard disk or flash memory. , or an external storage device 9f consisting of a memory card or the like, a ROM 9g, and a RAM 9h.
The processing unit 9a expands the computer program stored in the ROM 9g into the RAM 9h and executes it. The communication unit 9b accesses the web server 2 of the route guidance system 1 via the communication carrier, transmits the data input from the input unit 9c to the communication device 5 of the web server 2, and is executed by the web server 2, The route search result sent via the communication device 5 is received. The processing unit 9a causes the display unit 9e to display the route search result received by the communication unit 9b as a map, and causes the audio output unit 9d to generate audio.
Further, the external server 10a is a server of another company that provides a navigation system, and the external server 10b is a server of a police organization that has information on crimes and accidents in each prefecture.

As shown in FIG. 2, the street light information database 3a includes a "type" indicating whether a street light is a fluorescent light, an LED light, an organic EL light, etc., and a "type" of the street light derived from this "type". "Output" is stored, and a "brightness evaluation point" calculated from this "output" is stored in association with "type".
The streetlight installation information database 3b stores the "type" and "brightness evaluation point" of the streetlight, and also associates the "coordinates" on the map corresponding to the installation location of the streetlight with the "brightness evaluation point". It is stored in a closed state.
In the crime/accident information database 3c, "type of crime" and "type of accident" are stored in association with "number of occurrences" and "coordinates" on a map corresponding to the place of occurrence. The information database 3d stores "store type", "business days (days of the week)", "business hours", and "presence or absence of security cameras" in correspondence with "coordinates" on the map corresponding to the business location. has been done.
The camera installation information database 3e stores the "coordinates" on the map corresponding to the installation location of the security camera, and the map information database 3f stores the "image data" of the map and the "route data" on the map. It is stored in association with the "coordinates" above. In the user information database 3g, "type of inquiry" and "content of inquiry" are stored in correspondence with the "satisfaction level" of the user.

The route guidance means 4a of the route guidance system 1 performs route guidance processing that searches for a safe route that is unlikely to be involved in crime in response to a request from the user terminal 9, and presents the result to the user of the user terminal 9. I do. Further, the information management means 4b of the route guidance system 1 performs a database update process in which information acquired via the communication device 5 and information input from the input device 8 are reflected in the database stored in the external storage device 3.
Among these processes, the route guidance process executed by the route guidance means 4a will be described first with reference to FIGS. 3(a) and 4.
The user of the user terminal 9 starts an application for using the route guidance system 1, operates the input section 9c to input the departure point and destination, and then selects a safety option and a route option on the application. (Steps S1 to S3 shown in FIG. 4). Specifically, select one of "Brightness Priority", "Crime/Accident Free Priority", and "Traffic Volume/Camera Priority" as the safety option, and choose "Transportation Method (walking, car, train)" as the route option. Select one of the options and enter the "departure time" or "arrival time".

As shown in FIG. 3(a), data d1 regarding the departure point, destination, safety options, and route options received by the communication device 5 of the Web server 2 via the communication unit 9b is sent to the route guidance means 4a. The route guide means 4a searches for a route from the departure point to the destination based on the conditions selected or input in the route option (step S4 shown in FIG. 4). When the route guidance means 4a determines that "brightness priority" is selected in the safety option in step S5, it sends the route data d2 regarding the route obtained by the search in step S4 to the external storage device 3, and Using the coordinates on the map corresponding to the map as a key, the number of streetlights installed along the route, the "brightness evaluation points", the business location of the store, and the type of lighting in the store are obtained from the streetlight installation information database 3b and the store information database 3d. , data d3 regarding the "brightness evaluation score" derived from business days (days of the week) and business hours is read out.
The calculation means 4c receives the command signal a1 for starting the calculation of the "brightness evaluation index" as well as the route data d2 and the data d3 from the route guidance means 4a, and operates the streetlights installed along the route and The average value of the "brightness evaluation points" obtained for each route by dividing the total "brightness evaluation points" of the stores located in the store by the distance of the route is used as the "brightness evaluation index", and the "brightness evaluation index" The data d4 is sent to the route guidance means 4a in such a state that the correspondence with each route can be known. The route guidance means 4a ranks the routes based on the data d4 so that routes with a high "brightness evaluation index" are given priority, and then ranks the routes based on the data d5 regarding the route ranking and a map read from the map information database 3f. The information-related data d11 is sent to the communication device 5 together with the route data d2 (step S6 shown in FIG. 4). Then, the processing unit 9a of the user terminal 9 receives route data d2, data d5, and d11 from the communication device 5 of the Web server 2 via the communication unit 9b. Note that if the route guidance means 4a determines in step S5 that "brightness priority" is not selected as a safety option, it bypasses step S6 and proceeds to the process of step S7.

If the route guidance means 4a determines that "priority to no crime/accident" is selected in the safety option in step S7, it sends the route data d2 regarding the route obtained by the search in step S4 to the external storage device 3, and stores the route. Data d3 regarding the "type" and "number" of crimes and accidents occurring on the route is read from the crime/accident information database 3c using the coordinates on the map corresponding to the map as a key.
The calculation means 4c receives the command signal a1 for starting the calculation of the "crime/accident evaluation index" as well as the route data d2 and the data d3 from the route guidance means 4a, and calculates the "number of crimes and accidents occurring on the route." The average number of crimes and accidents for each route is calculated by dividing the total number of ``numbers of crimes and accidents'' by the distance of the route. The "type" of crimes and accidents is taken into consideration when calculating the total number of incidents. For example, if it is determined that the severity of a crime or accident is minor based on the ``type'' of the crime or accident, the number of incidents corresponding to that ``type'' is multiplied by a coefficient smaller than 1.
The calculating means 4c sets the average value of the "number of crimes and accidents" as a "crime/accident evaluation index" and routes the data d4 regarding this "crime/accident evaluation index" in such a manner that the correspondence with each route can be understood. It is sent to the guide means 4a. Then, the route guidance means 4a ranks the routes based on the data d4 so that routes with a low "crime/accident evaluation index" are prioritized, and then uses the data d5 regarding the route ranking and the map information database 3f. The data d11 regarding the read map information is sent to the communication device 5 together with the route data d2 (step S8 shown in FIG. 4). Then, the processing unit 9a of the user terminal 9 receives route data d2, data d5, and d11 from the communication device 5 of the Web server 2 via the communication unit 9b. Note that if the route guide means 4a determines in step S7 that "priority for no crime/accident" is selected in the safety option, the route guide means 4a bypasses step S8 and proceeds to the process of step S9.

When the route guidance means 4a determines that "traffic volume/camera priority" is selected as a safety option in step S9, it sends the route data d2 regarding the route obtained by the search in step S4 to the external storage device 3, and stores the route. Data d3 regarding the number of security cameras installed on the route is read from the camera installation information database 3e and the store information database 3d using the coordinates on the map corresponding to the map as a key, and the data d3 is sent to the external server 10a connected to the network 11. The access is made to obtain data d6 regarding traffic volume held by other companies providing navigation systems.
The calculation means 4c receives the command signal a1 for starting the calculation of the "traffic volume/camera evaluation index" as well as the route data d2, data d3, and d6 from the route guidance means 4a. The average value of the "number of security cameras" is calculated for each route by dividing the sum of "the number of cameras" by the distance of the route, and based on data d6, the average value of the "number of security cameras" is calculated so that the smaller the traffic volume, the larger the value Set quantity index. Thereafter, the calculation means 4c sets the value obtained by adding the traffic volume index to the "number of security cameras" as a "traffic volume/camera evaluation index", and uses data d4 regarding this "traffic volume/camera evaluation index" to correspond to each route. It is sent to the route guidance means 4a in such a state that it can be understood. Then, the route guidance means 4a ranks the routes based on the data d4 so that a route with a high "traffic volume/camera evaluation index" is given priority, and then combines the route ranking data d5 and the map information database 3f. The map information data d11 read from the map information is sent to the communication device 5 together with the route data d2 (step S10 shown in FIG. 4). Then, the processing unit 9a of the user terminal 9 receives route data d2, data d5, and d11 from the communication device 5 of the Web server 2 via the communication unit 9b. Note that if the route guidance means 4a determines in step S9 that "traffic volume/camera priority" is not selected as a safety option, it bypasses step S10 and proceeds to step S11.
In step S11, the processing unit 9a of the user terminal 9 displays on the display unit 9e a route ranked according to one of the following conditions: “brightness priority,” “crime/accident free priority,” and “traffic volume/camera priority.” Display it as a map (step S11 shown in FIG. 4). Then, in step S12, if the user of the user terminal 9 has not terminated the application for using the route guidance system 1, the information management means 4b determines that the route is not finalized, and performs the processing in step S2. The route guidance process is repeated again. On the other hand, if the user of the user terminal 9 terminates the application for using the route guidance system 1, the information management means 4b determines that the route has been determined in step S12, and ends the route guidance process. let

Next, the database update process executed by the information management means 4b will be explained using FIG. 3(b) and FIG. 5.
As shown in FIG. 3(b), the information management means 4b accesses other servers (not shown) connected to the network 11 or external servers 10b, and accesses information held by other organizations including police organizations. When the data d7, the data d8 sent via email from the user terminal 9 via the network 11, or the data d9 input from the input device 8 are acquired, a database update process is performed.
For example, if the information management means 4b determines that the data d7 to d9 are streetlight installation information in step S1 shown in FIG. The "brightness evaluation point" data d10 corresponding to the "type" of the streetlight is read out, included in the streetlight installation information, and stored in the streetlight installation information database 3b (step S2 shown in FIG. 5). Note that if the data d7 to d9 are not street light installation information, the information management means 4b bypasses step S2 and proceeds to the process of step S3.

When the information management means 4b determines that the data d7 to d9 are crime/accident information in step S3, it updates the crime/accident information database 3c using the data d7 to d9 (step S4 shown in FIG. 5). . Note that if the data d7 to d9 are not crime/accident information, the information management means 4b bypasses step S4 and proceeds to step S5.
Next, when the information management means 4b determines that the data d7 to d9 are store information in step S5, it updates the store information database 3d using the data d7 to d9 (step S6 shown in FIG. 5). Note that if the data d7 to d9 are not store information, the information management means 4b bypasses step S6 and proceeds to the process of step S7.
Further, when the information management means 4b determines that the data d7 to d9 are camera installation information in step S7, it updates the camera installation information database 3e using the data d7 to d9 (step S8 shown in FIG. 5). . Note that if the data d7 to d9 are not camera installation information, the information management means 4b bypasses step S8 and proceeds to the process of step S9.
When the information management means 4b determines that the data d7 to d9 are user information in step S9, it updates the user information database 3g using the data d7 to d9 (step S10 shown in FIG. 5). . Note that if the data d7 to d9 are not user information, the information management means 4b ends the database update process without executing step S10.

As explained above, in the route guidance system 1 of the present invention, when the user selects the safety option of "brightness priority", the Since priority is added, the user can accurately evaluate the brightness of the route. In addition, if the user selects the safety option "Prioritize no crimes or accidents," the safety evaluation of the multiple routes obtained through the search will be performed based on the type and number of crimes and accidents that have occurred in the past. Can be done accurately. Furthermore, if the user selects the safety option "traffic volume/camera priority", the level of security corresponding to the number of security cameras installed and the traffic volume derived from the traffic volume for multiple routes obtained by the search. Since priority is added based on the index of the likelihood of an accident occurring, users can accurately evaluate the safety of the route in question. Therefore, according to the route guidance system 1 of the present invention, it is possible to appropriately guide the user to a safe route that is unlikely to be involved in a crime.
Further, according to the route guidance system 1 of the present invention including the information management means 4b, it is possible to sequentially update and appropriately manage the information used for evaluating the safety of the route obtained through the search.

Note that the route guidance processing in the route guidance system 1 of the present invention is not limited to the procedure shown in FIG. 4. For example, in step S4 of FIG. 4, instead of searching for a route, the communication device 5 of the Web server 2 sends the departure point and destination received from the user terminal 9 to an external server 10a of another company providing the navigation system. The navigation system may be used to obtain route data d2 regarding the route.
Furthermore, the streetlight information database 3a, streetlight installation information database 3b, crime/accident information database 3c, store information database 3d, camera installation information database 3e, map information database 3f, and user information database 3g are not limited to the external storage device 3. It may be constructed in an internal storage device such as RAM 7.

INDUSTRIAL APPLICATION This invention can be utilized when it is necessary to suggest a safe route that is unlikely to be involved in a crime to a user using a user terminal.

1...Route guidance system 2...Web server 3...External storage device 3a...Street light information database 3b...Street light installation information database 3c...Crime/accident information database 3d...Store information database 3e...Camera installation information database 3f...Map information database 3g... User information database 4...Processing device 4a...Route guidance means 4b...Information management means 4c...Calculating means 5...Communication device 6...ROM 7...RAM 8...Input device 9...User terminal 9a...Processing section 9b...Communication section 9c ...Input section 9d...Audio output section 9e...Display section 9f...External storage device 9g...ROM 9h...RAM 10a, 10b...External server 11...Network a1...Command signal d1...Data d2...Route data d3-d11...Data

Claims (4)

A route guidance system that proposes a safe route to a user terminal connected to the Internet that is unlikely to be involved in a crime,
a web server connected to the Internet via a communication device;
A storage device connected to this web server and in which a street light installation information database is constructed,
The web server includes a processing device having route guidance means,
The route guidance means searches for a plurality of routes connecting the departure point and the destination inputted from the user terminal, and based on the type and number of streetlights for each route read from the streetlight installation information database. A route characterized in that a first ranking is performed for a plurality of the routes, and a result of the first ranking is transmitted to the user terminal via the communication device along with route data regarding the plurality of routes. Guidance system. The web server includes information management means,
The route guidance system according to claim 1, wherein the information management means updates the streetlight installation information database based on data acquired via the communication device. A crime/accident information database is constructed in the storage device,
The route guidance means performs a second ranking on the plurality of routes based on the number and type of crimes/accidents for each route read from the crime/accident information database, and According to claim 1 or 2, the result is transmitted to the user terminal via the communication device together with the route data regarding the plurality of routes instead of the first ranking result. route guidance system. A camera installation information database is constructed in the storage device,
The route guidance means performs a third ranking on the plurality of routes based on the number of security cameras installed for each route read from the camera installation information database, and ranks the third ranking results in the third ranking. 2. The route guidance system according to claim 1, wherein the route guidance system transmits to the user terminal via the communication device together with the route data regarding a plurality of the routes instead of the ranking result.

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