JP3860791B2 - Road information providing server, road information providing system, and road information providing method - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a road information providing server, a road information providing system, and a road information providing method for providing road information such as traffic jam information. In particular, the present invention relates to a road information providing server, a road information providing system, and a road information providing method capable of providing road information for the entire process accurately and quickly even in route designation over a wide range (long distance section).
[0002]
[Prior art]
Conventionally, as traffic jam information, information on the head position and tail position of a traffic jam section, the total length of the section, the time taken to traverse the traffic jam section from the tail to the head, etc. are installed on radio broadcasts and main trunk lines It is provided to the driver of the vehicle through the electronic bulletin board that has been used and other navigation devices mounted on the vehicle.
[0003]
In recent years, a vehicle detector that detects a traveling vehicle is installed on the side of the road, information obtained from the vehicle detector is analyzed on the center side, and a traffic congestion section is determined (for example, road traffic) An information communication system (VICS) has been introduced, and a driver can accurately obtain detailed traffic information such as the head position and the total length of a traffic jam section from this system.
[0004]
For example, JP 2002-257561 A describes a traffic jam information providing system and a traffic jam information providing device. In this traffic jam information providing system, information such as the amount of vehicle traffic on each road and the vehicle speed of the passing vehicle is acquired, and based on the traffic information, the head position of the traffic jam section, the traffic jam length, etc. are calculated. The traffic information is transmitted to the user side wirelessly. Here, a traffic information communication system (VICS) is mentioned as this traffic information providing system, and traffic information is transmitted to the user side from an optical beacon, a radio beacon, an FM multiplex broadcast antenna, or the like.
[0005]
In addition to the traffic information sent to the user, construction information that indicates the location of the construction site, accident information that indicates the location of the accident site, closed information that indicates a closed road, etc. There is common traffic information required to provide (described below). In particular, this common traffic jam information is composed of information such as a road number that allows the navigation device to identify the road where the traffic jam has occurred, the head position and the tail position of the traffic jam, and the traffic jam amount (for example, the traffic jam length).
[0006]
On the other hand, in order to receive traffic information provided from this traffic information providing system, a navigation device having a function as a traffic information providing device is mounted on the user's vehicle. Here, the traffic jam information providing apparatus is configured to receive traffic information provided from the traffic jam information providing system via a receiving antenna. As this receiving unit, for example, an optical beacon receiver that receives traffic information transmitted from the road traffic information communication system (VICS) to the vehicle side, a radio beacon receiver, and the vehicle side via FM multiplex broadcasting. An FM receiver that receives traffic information transmitted to the mobile phone.
[0007]
As described above, according to the conventional traffic jam information providing system and the traffic jam information providing device, the navigation device having the function as the traffic jam information providing device uses the traffic information including the information on the traffic jam section in which the vehicle is traveling as road information. By receiving from the traffic information communication system (VICS), individual traffic jam information for each vehicle can be provided to the vehicle occupant.
[0008]
[Problems to be solved by the invention]
However, according to the conventional traffic jam information providing system and the traffic jam information providing device as disclosed in JP 2002-257561 A, the traffic jam information is transmitted from the road traffic information communication system (VICS) by FM multiplex broadcasting, etc. Since this is received on the vehicle side, there is a problem that the user can obtain only traffic jam information only around the vehicle where FM radio waves reach.
[0009]
For this reason, there is a problem that it is impossible to obtain a wide range of traffic jam information, and it is impossible to accurately derive an actual shortest route in long-distance navigation.
[0010]
Accordingly, an object of the present invention is to provide a road information providing server, a road information providing system, and a road information providing system capable of accurately and quickly deriving the shortest route (route) information, traffic jam information in the entire process, etc. And providing a method for providing traffic information.
[0011]
[Means for Solving the Problems]
In order to solve the above-described problems, a road information providing server according to the present invention is a road information providing server that provides road traffic jam information, and stores basic traffic network storage means for storing road network information and traffic jam information. A traffic jam information storage means, a traffic jam information processing means for generating a traffic jam road network based on road network information stored in the basic road network storage means and traffic jam information stored in the traffic jam information storage means, and traffic jam information Congested road network storage means for storing the congested road network generated by the processing means, routing information for specifying the route to be searched, congested road network stored in the congested road network storage means, and basic road network storage Based on the road network information stored in the means. Information providing processing means for generating and providing road information for the entire journey, and the traffic jam information stored in the traffic jam information storage means is indicated by a travel time t (i) in the unit route (i). In this case, the traffic jam information processing means uses the average hourly speed v determined for each route type and stored in the basic road network storage means and the travel time t (i) stored in the traffic jam information storage means. The traffic congestion distance L (i) of each unit route (i) constituting the network is
<Formula 1>
L (i) = v · t (i)
To generate a congested road network .
[0012]
In order to solve the above problems, the road information providing system according to the present invention is a terminal device that requests road information by specifying a route, a traffic information center that provides traffic information, and a request from the terminal device. A road information providing system comprising: a road information providing server that generates road information based on traffic jam information from a traffic jam information center and provides the road information to a terminal device; It is a server.
[0013]
In order to solve the above problems, a road information providing method of the present invention is a road information providing method executed by a computer to provide road information of a designated route, and (A) each unit route (i) The basic distance L0 (i), its type, and the average speed v determined for each route type are stored as road network information, (B) traffic information is acquired and stored, and (C) road network information is stored. The traffic jam network is generated and stored based on the traffic jam information, and (D) the route and time of the shortest route are calculated based on the traffic jam network of the designated route in response to a request accompanied by the route designation. Calculating the distance of the shortest route based on the information of the road network, generating the route, distance and time of the shortest route as road information, and (E) providing the generated road information, (B) acquires and stores travel time t (i) for each unit route (i) as traffic jam information, and step (C) uses the average speed v and travel time t (i) to The traffic jam distance L (i) of each unit route (i) constituting the road network is
<Formula 1>
L (i) = v · t (i)
To generate a congested road network .
[0015]
Further, using the traffic jam and / or congestion in each unit route (i) and the respective distances x and / or y as the traffic jam information, the basic distance L0 (i) in each unit route (i) of the road network information and the relevant route Based on the traffic jam information, the traffic jam distance L (i) of each unit route (i) constituting the traffic jam network is
<Formula 2>
L (i) = (L0 (i) -xy) + αx + βy
Where α is the weighted constant during traffic (> 1)
β is a weighted constant during congestion (> 1)
It is also possible to generate a congested road network by calculating by
[0016]
Congestion information is centrally collected and managed, a congestion road network for the entire road is generated, and road information of the corresponding (specified) route is generated based on the congestion road network according to the user's request Therefore, it is possible to accurately and quickly derive road information such as the shortest route (route) information and traffic jam information even in a wide range (long-distance section) route designation (designation of a start point position and an end point position, etc.). it can.
[0017]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of a road information providing server, a road information providing system, and a road information providing method of the present invention will be described with reference to the drawings.
[0018]
FIG. 1 is a diagram showing an example of a usage pattern of the road information providing system of the present invention. In FIG. 1, the road information providing system includes a terminal device such as a car navigation device 20a, a mobile phone 20b, a PC (Personal Computer) 20c that requests road information by specifying a route, and road traffic information that provides traffic jam information. In response to a request from a traffic information center (hereinafter also simply referred to as “VICS center”) 40 such as a communication system (VICS) and the terminal devices 20a to 20c, road information is obtained based on traffic information from the VICS center 40. A road information providing server 10 that is generated and provided to the terminal devices 20a to 20c, a dedicated line network 50 that connects the road information providing server 10 and the VICS center 40 with a dedicated line, and the terminal devices 20a to 20c and the road information providing server 10 And the network 30 that connects the communication and the GPS (Glo bal Positioning System) 60.
[0019]
Here, the terminal devices 20a to 20c can acquire the current position information from the GPS 60 and use it as the starting point position of the designated route.
[0020]
FIG. 2 is a diagram showing an example of the form of the road information providing server 10 of the present invention. In FIG. 2, the road information providing server 10 includes a VICS information receiving unit 11 that receives traffic information from the VICS center 40 (FIG. 1) at a predetermined timing (for example, every 5 minutes) via the dedicated line network 50. , A traffic information DB (Data Base) 12 for storing traffic information received by the VICS information receiving unit 11, a route type and basic distance L0 (i) for each predetermined unit route (i), and an average hourly speed v for each route type A traffic jam that generates a traffic jam road network based on the traffic network information stored in the traffic information stored in the traffic network information stored in the traffic network information stored in the traffic network information stored in the traffic network information stored in the traffic information stored in the traffic information Information processing unit 13 and a traffic jam network that stores the traffic jam network generated by traffic jam information processing unit 13 Based on the network DB 15 and the route designation information in which the route to be searched is designated, the information on all the routes in the route is obtained from the information on the congestion road network stored in the congestion road network DB 15 and the road network stored in the basic road network DB 14. And an information provision processing unit 19 that generates and provides road information.
[0021]
Here, the information provision processing unit 19 is based on the communication control unit 17 that performs communication with the terminal devices 20a to 20c via the network 30 and the routing information received by the communication control unit 17, based on the congestion road network. An information processing unit 16 that generates, as road information, the traffic jam distance (L (i)) of each unit route (i) of the entire journey from the traffic jam network stored in the DB 15, and the road information generated by the information processing unit 16 Is stored in the road information DB 18.
[0022]
Further, the information provision processing unit 19 generates, as road information, the shortest route (route) from the congestion distance (L (i)) based on the start point position information and the end point position information specified from the terminal devices 20a to 20c. In addition, a plurality of routes (routes) can be generated as road information together with respective predicted times (required time, arrival time, etc.).
[0023]
The traffic information provided as traffic jam information from the road traffic information communication system (VICS) includes construction information indicating the location of the construction site, accident information indicating the location of the accident site, and closed information indicating the closed road. , There is common traffic information. In particular, the common traffic jam information includes a road number for enabling identification of a road where the traffic jam occurs, a traffic jam head position, a traffic jam position, a traffic jam amount (for example, a traffic jam length (x), a congestion length (y), It consists of information such as travel time (t) for a predetermined route.
[0024]
Next, an information providing method using the road information providing system and the road information providing server 10 of the present invention shown in FIGS. 1 and 2 will be described.
[0025]
3 to 5 are flowcharts showing an information providing method using the road information providing system of the present invention. 1 to 5, in the information providing method according to the present invention, a traffic jam network is first generated by the traffic jam information processing unit 13 and stored in the traffic jam network DB 15 (step 301).
[0026]
FIG. 4 shows details of step 301. First, the road information providing server 10 stores road network information including the basic distance L0 (i) of each unit route (i) and its type and the average speed v for each route type in the basic road network DB 14. (Step 301-1).
[0027]
Then, traffic jam information (traffic information) is acquired from the VICS center 40 and stored in the traffic jam information DB 12 (step 301-2).
[0028]
Next, the traffic jam information processing unit 13 generates a traffic jam road network based on the traffic jam information stored in the traffic jam information DB 12 and the information on the road network stored in the basic road network DB 14, and the traffic jam road information network DB 15 (Step 301-3).
[0029]
Here, a method for generating a congested road network will be described. If the traffic information stored in step 301-2 includes travel time t (i) for each unit route (i), in step 301-3, the type of route (highway, general national road) , Using the average hourly speed v determined for each prefectural road, etc., the traffic jam distance L (i) of each unit route (i)
<Formula 1>
L (i) = v · t (i)
Can be used to generate a congested road network.
[0030]
In addition, when the traffic jam information stored in step 301-2 includes the traffic jam or congestion distance (congestion distance (x) or (congestion distance (y)) in each unit route (i), In step 301-3, based on the basic distance L0 (i) in each unit route (i) of the road network, the congestion distance (x) in the unit route (i) included in the congestion information, and the congestion distance (y), The congestion distance L (i) of each unit route (i) constituting the congestion road network is
<Formula 2>
L (i) = (L0 (i) -xy) + αx + βy
Where α is the weighted constant during traffic (> 1)
β is a weighted constant during congestion (> 1)
The traffic congestion road network can be generated by calculation.
[0031]
The congestion road network generated in this way is stored in the congestion road network DB 15 (step 301-3).
[0032]
Here, Step 301-2 and Step 301-3 can be performed at a predetermined timing (for example, every 5 minutes), and Step 301-2 and Step 301-3 are performed at every update timing of the traffic jam information ( Step 301-4).
[0033]
And when there exists a request | requirement accompanying route designation from the terminal devices 20a-20c (step 301-5), the process of the production | generation of the road information in a designated route (step 302) is performed. Here, the required route designation includes information such as a departure point (start point position information), a transit point, a destination end point position information, use / unused toll roads, and the like.
[0034]
FIG. 5 shows details of the processing from step 302 to step 303. 3 and 5, when there is a request accompanied with route designation (step 301-5 in FIG. 4), a congested road network of the designated route is searched and collected (step 302-1).
[0035]
FIG. 6 shows an example in the case where a route from the designated start point position S to end point position E is searched. As shown in FIG. 6, the congestion road network DB 15 stores a congestion distance L (i) for each predetermined unit route (i). FIG. 6 particularly shows a traffic jam network from the starting position S to the interchange A. There are a plurality of routes from the starting point position S to the interchange A. By comparing the addition of L (i) from S to A, the shortest route (L (4)-> L (8)-> L ( 9)-> L (13)-> L (20)-> L (24)). Here, in the comparison of L (i), in addition to the case of directly comparing the total distance ΣL (i), the passing time t (i) is obtained for each unit route (i) and added. To be able to. That is, using the average speed v according to the type of unit route (i),
<Formula 3>
t (i) = L (i) / v
To obtain the time t (i) required to pass through the unit route (i), and add this for each route (route) to obtain the route (route) having the smallest value of Σt (i). Route (route). In addition, it is good to memorize | store accident information, construction information, a road stop, etc. as point information like the x mark shown on the unit route (22), for example. When the cross mark shown on the unit path (22) is closed, L (22) = ∞ or t (22) = ∞ may be set, and a predetermined numerical value may be input as a dummy. . Alternatively, the unit route (22) may be deleted.
[0036]
Such a route search is also performed between the interchange C and the end point position E. In addition, from Interchange A to Interchange C, the car runs on a highway. At this time, traffic information between AB and BC is taken into consideration in the above-described <Expression 1> or <Expression 2>, and the traffic congestion distance L (i) can be obtained. ) Can be obtained.
[0037]
In the above route search, not only the shortest route (the route (route) with the minimum value of ΣL (i) and Σt (i)) but also the traffic distance ΣL (i) and the passage time Σt (i) are set in ascending order. You can also selectively search for routes. Further, using <Expression 3>, in addition to the required time t (i) (t (i) = L (i) / v) for each route and unit route (i), the estimated arrival time (current time + Σt ( i)) and the like. Furthermore, it is also possible to search on the condition such as a route that does not use a toll road (highway) or a route that gives priority to a toll road (highway) depending on whether toll road is used / not used.
[0038]
Road information (direction (route), distance, time (passing time, arrival time, etc.)) transmitted to the terminal devices 20a to 20c is generated in response to requests from the terminal devices 20a to 20c. That is, road information can be generated based on a congested road network under the above-described conditions. The road information generated in this way is stored in the road information DB 18 (step 302-2).
[0039]
The road information generated and stored is provided to the terminal devices 20a to 20c (step 303-1). At this time, the provision timing may be performed immediately after the generation of the road information, or may be performed in response to a request from the terminal devices 20a to 20c.
[0040]
In addition, when there is a road information update request from the terminal devices 20a to 20c (step 303-2), the processing from step 302-1 may be repeated.
[0041]
The road information providing server, the road information providing system, and the road information providing method according to the present invention have been described above. However, the above-described processing of step 301, step 302, and step 303 can be performed independently. That is, during the generation of the road information in step 302 and the provision of the road information in step 303, the congested road network in step 301 can be generated and stored (updated).
[0042]
【The invention's effect】
As described above, according to the road information providing server, the road information providing system, and the road information providing method of the present invention, the congestion information is collected and managed in a unified manner, the congestion road network of the entire road is generated, and the user In response to the request, road information of the corresponding (designated) route can be generated based on the traffic jam road network, so a wide range (long-distance section) route designation (designation of start point position and end point position, etc.) ), Road information such as shortest route information and traffic jam information can be derived accurately and quickly.
[Brief description of the drawings]
FIG. 1 is a diagram showing an example of a usage pattern of a road information providing system according to the present invention.
FIG. 2 is a diagram showing an example of a form of a road information providing server according to the present invention.
FIG. 3 is a flowchart showing a road information providing method according to the present invention.
FIG. 4 is a flowchart showing a road information providing method according to the present invention.
FIG. 5 is a flowchart showing a road information providing method according to the present invention.
FIG. 6 is a diagram illustrating an example in a case where a route from a designated start point position S to an end point position E is searched.
[Explanation of symbols]
10 road information providing server 11 VICS information receiving unit 12 traffic jam information DB
13 Traffic Information Processing Unit 14 Basic Road Network DB
15 Traffic jam network DB
16 Information processing unit 17 Communication control unit 18 Road information DB
19 Information Provision Processing Unit 20a Car Navigation Device 20b Mobile Phone 20c PC
30 Network 40 VICS Center 50 Private network 60 GPS

Claims (7)

A road information providing server that provides road traffic information,
Basic road network storage means for storing road network information;
Traffic information storage means for storing traffic information;
A traffic jam information processing unit for generating a traffic jam road network based on the information on the road network stored in the basic road network storage unit and the traffic jam information stored in the traffic jam information storage unit;
A congested road network storage means for storing the congested road network generated by the traffic information processing means;
Based on the routing information in which the route to be searched is specified, the traffic road network stored in the traffic road network storage means, and the road network information stored in the basic road network storage means, Information providing processing means for generating and providing road information for the entire route in the route;
With
When the traffic information stored in the traffic information storage means is indicated by the travel time t (i) in the unit route (i),
The traffic jam information processing means
Each of the traffic jam network is configured using the average speed v determined for each route type and stored in the basic road network storage means and the travel time t (i) stored in the traffic jam information storage means. The congestion distance L (i) of the unit route (i)
<Formula 1>
L (i) = v · t (i)
To generate a congested road network,
A road information providing server characterized by that. The traffic jam information processing means
The basic distance L0 (i) in each unit route (i) of the road network information stored in the basic road network storage means and the unit included in the traffic jam information stored in the traffic jam information storage means Based on the congestion and / or congestion in the route (i) and the respective distances x and / or y, the congestion distance L (i) of each unit route (i) constituting the congestion road network is
<Formula 2>
L (i) = (L0 (i) -xy) + αx + βy
Where α is the weighted constant during traffic (> 1)
β is a weighted constant during congestion (> 1)
To generate a congested road network,
The road information providing server according to claim 1, wherein: A terminal device that requests road information by specifying a route;
A traffic information center that provides traffic information,
In response to a request from the terminal device, based on the traffic jam information from the traffic jam information center, road information is generated and provided to the terminal device;
In a road information providing system comprising:
The road information providing server is the road information providing server according to claim 1 or 2 ,
A road information provision system characterized by this. 4. The road information providing system according to claim 3 , wherein the traffic jam information center is a road traffic information communication system (VICS). The terminal device, GPS (Global Positioning System) after acquiring current position information, road information providing system according to claim 3 or 4 further characterized in that the starting point position of the path to be specified. A road information providing method executed by a computer to provide road information of a specified route,
(A) The basic distance L0 (i) of each unit route (i) and its type, and the average speed v determined for each route type are stored as road network information,
(B) Obtain and store traffic information,
(C) generating and storing a traffic jam road network based on the road network information and the traffic jam information;
(D) In response to a request with route designation, the route and time of the shortest route are calculated based on the congested road network of the designated route, and the distance of the shortest route is calculated based on the information of the road network. Calculate and generate the shortest route directions, distance and time as road information,
(E) providing the generated road information;
The step (B) acquires and stores the travel time t (i) in each unit route (i) as traffic jam information,
Wherein step (C), said using the average speed v and the travel time t (i), traffic congestion distance L of each unit pass constituting a congested road network (i) a (i),
<Formula 1>
L (i) = v · t (i)
To generate a congested road network,
A road information providing method characterized by that. The step (B) acquires and stores the traffic jam and / or congestion in each unit route (i) and the respective distances x and / or y as traffic jam information,
In the step (C), the basic distance L0 (i) in each unit route (i) of the road network and the distance x and / or the congestion and / or congestion in the unit route (i) included in the traffic jam information. Or based on y, the traffic jam distance L (i) of each unit route (i) constituting the traffic jam road network is
<Formula 2>
L (i) = (L0 (i) -xy) + αx + βy
Where α is the weighted constant during traffic (> 1)
β is a weighted constant during congestion (> 1)
To generate a congested road network,
The road information providing method according to claim 6 .

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