JP3154617B2 - Method and device for assigning a management number to a road subject to traffic management - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and an apparatus for assigning a management number to a traffic management target road used in a traffic management system.

[0002]

2. Description of the Related Art A traffic management system collects traffic congestion information and event information (accidents, road closures, lamp closures, etc.) on major roads and provides them to the driver in the form of characters, figures, sounds, and the like. .

[0003] In a traffic management system, main roads subject to traffic management (hereinafter referred to as traffic management target roads) are:
Conventionally, a selected / designated road is transcribed on a management drawing of a traffic management target road map, and a management number is manually assigned. When a traffic management target road was updated (new construction, abolition, etc.), it was added and deleted on the management drawing of the traffic management target road map, and a management number was similarly assigned and abolished.

[0004] In other words, conventional management and maintenance of the roads subject to traffic management are all performed on the drawing.

When a digital road map database is provided by the Japan Digital Road Map Association,
A traffic management system using this database has been developed.

In such a traffic management system, it is necessary to associate a road to be managed and managed on a drawing with a digital road map database, and after all, the corresponding work is performed manually. Was.

[0007]

However, in the above-mentioned conventional method, the road to be traffic-managed is managed and managed on the management drawing.
Maintenance had to be performed, and the correspondence between the roads subject to traffic management and the digital road map database had to be done manually.

More specifically, first, the type of road is read from the original road map, and a road to be traffic-managed is selected.
It was necessary to post it on the control drawing.

Second, it is necessary to read the breakpoints from the original road map and to divide the roads subject to traffic management into management units on the management drawing.

Third, for the purpose of reducing the management number, when a short-distance link within an intersection, a side road link, a side line link such as SA, etc. among roads of the management unit is excluded from the numbering, The outside road had to be read from the original road map and transcribed on the management drawing.

Fourthly, it is necessary to rank the roads of the management unit to be numbered according to the type of road and to assign the management numbers on the management drawings.

Fifth, in order to realize route guidance within the road network to be traffic-managed, for each of the roads in the management unit,
In order to clarify the road of the management unit where the vehicle enters and exits, it is necessary to perform this association work on the management drawing.

Sixth, since any work is performed manually on the control drawing, the amount of work is large, the efficiency is low, it is difficult to improve the reliability (it is easy for leakage and mistakes to occur), and the application is high. There were problems such as inability to do so.

The present invention solves such a conventional problem, and eliminates the management and maintenance of the traffic management target road on the drawing and the work of corresponding the traffic management target road to the digital road map database. It is an object of the present invention to provide a method and an apparatus for assigning a management number for a traffic management object reason that can realize improvement of efficiency, improvement of reliability, and applicability / expansion.

[0015]

According to the present invention, in order to achieve the above object, a road to be traffic-managed is selected from road attributes of a digital road map database, and a unit from a break point such as an intersection to a break point is set as a management unit. It classifies, ranks the roads of the management unit based on the road attributes and coordinates, and automatically assigns a management number, and further manages the destination or origin of the outflow or inflow of vehicles for each road of the management unit. With respect to a unit road, its management number is registered as a connection road on the end or start end side.

[0016]

Therefore, according to the present invention, the management and maintenance of the traffic management target road on the drawing, and the work of coping with the traffic management target road and the digital road map database are eliminated, and the efficiency and reliability are improved. Applicability / extensibility can be realized.

[0017]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A method for assigning a management number to a traffic management target road and creating a traffic management target road database according to one embodiment of the present invention will be described below with reference to FIG.
In FIG. 1, reference numeral 11 denotes first database conversion means, 1
2 is a second database conversion unit, 13 is a third database conversion unit, 14 is a fourth database conversion unit,
Reference numeral 15 denotes fifth database conversion means.

The first data conversion means 11 stores the digital road map database 101 and the detour guidance target road data 1
02, the target road intermediate data 103 is created. Second
The data conversion means 12 generates the target road management unit data (A) 105 from the target road intermediate data 103 and the additional breakpoint data 104. Third data conversion means 31
3 is the target road management unit data (A) 105 to the target road management unit data (B) 106 and the unnumbered road data 10
7 is created. The fourth data conversion means 414 creates the target road management unit data (C) 108 from the target road management unit data (B) 106. Fifth data conversion means 5
Reference numeral 15 creates a traffic management target road database 109 from the target road management unit data (C) 108 and the unnumbered road data 107.

Next, the operation of the above embodiment will be described. The digital road map database contains many attributes for one road. Among these attributes, whether a certain road is suitable for traffic management is determined by 1) road type (classification of expressway national highway, urban expressway, national highway, etc.) 2) road width (5.5m to 13m, 3) Special vehicle traffic system target code (whether the road is a special vehicle traffic system target road or not).

First, the digital road map database 101 is selected from all roads by the first data conversion means 11 by using:-roads that are equal to or greater than a prefectural road;-roads that are 13 m or more in width-roads that are subject to the special vehicle traffic system Is selected, and the target road intermediate data 103 is selected.
Create In other words, roads that are not necessary for traffic management (roads that do not satisfy the above conditions) are deleted from the digital road map database 101 to create the target road intermediate data 103. At this time, a road which does not satisfy the above condition and which is to be a target of the detour guidance for traffic flow distribution whose link number has been registered in advance in the detour guidance target road data 102 is added to the target road intermediate. Create data.

Next, the roads to be traffic-managed created in the target road intermediate data 103 are defined as one of the following: an intersection, a point at a prefectural boundary, a dead end point, and a point at a secondary mesh boundary. The roads to be traffic-managed are classified using a management unit up to the breakpoint. That is, with the target road intermediate data 103 as input, the second data conversion means 12 creates target road management unit data (A) 105 divided into management units. At this time, points that do not correspond to the above-mentioned breakpoints, but whose node numbers are registered in the additional breakpoint data 104 in advance (for example, entrance points of congested parking lots) are also added as breakpoints. Road management unit data (A) 105
Create

Next, for the purpose of reducing the management number to be subsequently assigned, the target road management unit data (A) 105 is input, and the third data conversion means 13 causes the data to be a certain distance or less (for example, 50 m or less). Then, the road of the management unit corresponding to the intra-intersection link, the side road link, and the side line link such as SA is deleted, and the target road management unit data (B) 106 and the unnumbered road data 107 are created.

Next, the target road management unit data (B) 10
The roads of the management unit created in 6 are: (1) Road type (described above) (2) Route number (for example, 16 on National Highway 16) (3) Main / slave road classification code (main road is new road / bypass, (The secondary road is an old road.) (4) Link type (classification such as main road, link in intersection, side road, etc.) (5) Road attributes of coordinates of both ends of road (normalized coordinates in secondary mesh (refer to JIS)) At the same time, the fourth data conversion means 14 ranks the roads of the management unit, assigns a management number,
The target road management unit data (C) 108 is created.

Finally, in order to perform route guidance in the traffic management target road network, the target road management unit data (C) 1
08 and the unnumbered road data 107 as input,
For each road of the management unit specified by the management number, the data conversion means 15 searches for the management number as the terminal road or the starting end connection road for the destination of the outflow or inflow of the vehicle or the road of the original management unit. If an unnumbered road exists, the link number is searched, and finally the traffic management target road database 109 is created.

Next, the specific operation of the above embodiment will be described. 2 and 4 show examples of the digital road map database 101 in the secondary mesh. However,
Here, only the parts necessary for the description of the present embodiment are extracted from the digital road map database.

In the digital road map database 101, one link (road unit) is given a link number. The link number is obtained by combining the node numbers at both ends of the link in ascending order of the node numbers. Example: Link connecting node number 0001 and node number 0002 → 00010002

Although there are many road attributes for a link, FIG. Road type 1 ・ ・ ・ Highway motorway 2 ・ ・ ・ Urban expressway 3 ・ ・ ・ General highway 4 ・ ・ ・ Main local prefectural road 5 ・ ・ ・ Main local city road 6 ・ ・ ・ General prefectural road 7 ・ ・・ General city road 9 ・ ・ ・ Other roads Line number (4 digits) For example, 16 main / slave road division codes of National Route 16 1 ・ ・ ・ Main road (bypass, new road, etc.) 2 ・ ・ ・ slave road (old road) ) Link type 1 ・ ・ ・ Main line without vertical line separation 2 ・ ・ ・ Main line with vertical line separation 3 ・ ・ ・ Connection road between main lines 4 ・ ・ ・ Link within intersection 5 ・ ・ ・ Side road link 6 ・ ・ ・ SA Road width code 1 ... 13m or more 2 ... 5.5m-13m 3 ... 3.0m-5.5m Road code for special vehicle traffic system 1 ... Target 2 ... Non Object Link length Expressed in m units Coordinates of both ends Coordinates of both ends are normalized coordinates in the secondary mesh Expressed by (X, also the Y coordinate 0-10000).

First, using the road attributes of the digital road map database 101, a road is selected under any of the following conditions: a road that is equal to or larger than a prefectural road; a road that is 13 m or more in width; Then, the target road intermediate data 103 as shown in FIG. 6 is created. Stated another way, roads that are not necessary for traffic management (roads that do not satisfy the above conditions) are deleted from the digital road map database to create target road intermediate data. At this time, a road which does not satisfy the above condition and which is to be a target of detour guidance for traffic flow distribution with a link number registered in advance in the detour guidance target road data 102 as shown in FIG. 5 is added. Then, the target road intermediate data 103 is created. In this example, the link numbers 00020003 and 00080010
Are excluded from the target roads. In reality, roads that are excluded are overwhelmingly large.

As a result, it is not necessary to read the type of the road from the original road map, select the road to be traffic-managed, and manually transcribe the road on the management drawing. This method has an effect that a road to be traffic-managed can be automatically selected using a digital road map database.

Next, the traffic management target road created in the target road intermediate data 103 is divided into one of the following: an intersection with the traffic management target road, a point at a prefectural boundary, a dead end point, and a point at a secondary mesh boundary. The traffic management target road is divided into points, and the sections from the break point to the break point are used as a management unit. That is, the target road intermediate data 103 is input, and the target road management unit data (A) as shown in FIG. At this time, a point (for example, an entrance point of a congested parking lot) in which a node number is not registered in the additional break point data 104 as shown in FIG. In addition, target road management unit data (A) 105 is created.

As a result, it is not necessary to read a breakpoint from the original road map and divide the road to be traffic-managed into management units on the management drawing. This method has an effect that a road to be traffic-managed is automatically divided into management units using a digital road map database.

Next, in order to reduce the number of management numbers when assigning a management number to a road divided into management units, links within an intersection of a certain distance or less (for example, 50 m or less), side road links, side line links such as SAs, etc. The road of the management unit corresponding to (hereinafter referred to as unnumbered road) is the target road management unit data (A)
The remaining data is deleted from the target road management unit data (B) 106 as shown in FIG. Further, the deleted link number is created as unnumbered road data 107 as shown in FIG.

As a result, it is not necessary to read the roads to be excluded from the original road map and transfer them to the management drawing as in the related art. This method has an effect of automatically selecting a road that is not to be assigned a management number by using a digital road map database.

Next, the target road management unit data (B) 10
(1) Road type (described above) (2) Route number (for example, 16 of National Highway 16) (3) Main / slave road classification code (for example, main road is new road / bypass) (4) Link type (classification of main road, links in intersections, connecting roads, etc.) (5) Based on road attributes of coordinates of both ends of the road (coordinates in secondary mesh (refer to JIS)) Then, the roads of the management unit are ranked and a management number is assigned.

[0035] One management number is assigned to a road separated from an up / down line (see link type) in the forward direction of one-way traffic. For other roads, two management numbers in both directions are given to one management unit.

Specific rules for assigning a management number are as follows. (1) Assigned in ascending order from a road with a high road type (a road with a small road type code). (2) When the road types are the same, the roads are assigned in ascending order from the road with the line number among the road with the line number and the road without the line number. (3) Among the roads with the line numbers, the roads with the smaller line numbers are assigned in ascending order. (4) When the road type and the line number are the same, or when the road type is the same and there is no line number, the roads are assigned in ascending order from the main road among the main road and the sub roads. (5) When the road type, the line number, and the main / sub road division code are the same, or when the road type and the main / sub road division code are the same and there is no line number, the roads with the smaller link type code are assigned in ascending order. (6) When the road type, the line number, the main / slave road division code and the link type code are the same, or when the road type, the main / sub road division code and the link type code are the same and there is no line number, Connect only those that have connectivity. Let both ends of the connected road be nodes a and b. However, the lower left corner of the secondary mesh ((x coordinate + y
(Coordinate) is smaller than the other. A management number is assigned in a direction starting from the node a. Assigned to the road of the next management unit in ascending order. The assignment of the management number is continued in one direction up to the road ending at the node b. Then node b
Is assigned a management number in the direction starting from (in the opposite direction)
Assigned in ascending order until reaching the node.

When the positional relationship of the links in the digital road map database 101 is as shown in FIG. 2, the selected traffic management target road and the result of the management number assignment are converted into the target road management unit data (C) 108 as shown in FIG. Create as This is illustrated in FIG. Note that FIG.
In the case of the link number 00010002, for example, it indicates that 00: forward direction 0001 → 0002 direction 01: reverse direction 0001 ← 0002 direction.

As a result, it is not necessary to prioritize the roads of the management unit to be numbered by the type of the roads and assign the management numbers on the management drawing. This method has an effect of automatically assigning a management number to a traffic management target road divided into management units using a digital road map database.

Finally, the connection relation between the target roads is incorporated into the database for the purpose of performing route guidance on the traffic management target road network. That is, the target road management unit data (C) 108 and the unnumbered road data 107 are input, and for each management unit road designated by the management number, the road of the management unit to which the vehicle flows out is determined on the terminal side. Search for the management number as a connecting road. Specifically, a management unit road having the end node number as the start node number is searched. Further, a link number in the unnumbered road data sharing the node number is searched, and a management unit road having the other end node number as a start end node number is searched. In addition, a similar search can be performed for the connection road on the starting end side from which the vehicle flows.

Through the above five steps, a traffic management target road database 109 as shown in FIG. 12 is created. FIG. 12 shows an example of management numbers 1 to 5. Explaining with management number 5, one link (001100)
12), the direction is 0011 → 0012. The connecting road on the starting end side (the road into which the vehicle flows) is the fourth road in one. There are three connecting roads (roads where vehicles flow out) on the terminal side, which are Nos. 6, 14, and 16. However, when the vehicle flows out, it passes through an unnumbered road. For No. 6, for link No. 14 of 00120013, for link No. 16 of 00120014, 00120013 and 00130
015 (see FIG. 3).

As a result, it is not necessary to perform the work of associating the connecting road on the starting end or the ending side on the management drawing as in the related art. This method has an effect of using a digital road map to automatically search for a connecting road at the start or end of a road in a certain management unit.

[0042]

The effects of the present invention are listed below. First, using the road attributes (road type, road width, special vehicle traffic system target code) of the digital road map database, the road to be traffic controlled is automatically selected, and a link number is previously stored in another data file. Can be added to the traffic management target road for which the detour guidance is registered.

The second is to automatically divide as a management unit from breakpoints such as intersections and dead ends as breakpoints, and to add breakpoints whose node numbers have been registered in another data file in advance. In addition, traffic management target roads can be classified into management units.

Third, in order to reduce the management number, when the road of the divided management unit is a link in an intersection, a connecting road / side road link, a side road link such as SA, etc., within a certain distance, the road is automatically set. It can be excluded from the management number assignment target.

Fourth, ranking is performed on traffic management target roads classified into management units based on road attributes (road type, route number, main / slave road division code, link type, coordinates of both ends). Then, the management number can be automatically given.

Fifth, for each management unit road designated by a management number for the purpose of route guidance, for the management unit road to which the vehicle flows out, the management number is set as the terminal connection road, and the traffic management target is used. Can be automatically registered in the road database. Similarly, the management number of the road of the original management unit into which the vehicle flows can be automatically registered in the traffic management target road database as the connection road on the starting end side.

As a result, there is no need to manage and maintain the roads to be traffic-managed on the drawing as in the prior art, and to perform the corresponding work between the roads to be traffic-managed and the digital road map database, thereby improving the efficiency and reliability. , Applicability, and expandability can be realized.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a flow of assigning a management number to a traffic management target road according to an embodiment of the present invention.

FIG. 2 is a schematic diagram showing the positional relationship of links in a digital road map database.

FIG. 3 is a schematic diagram showing a traffic management target road to which a management number is assigned.

FIG. 4 is a list showing an example of a digital road map database.

FIG. 5 is a list showing an example of detour guidance target road data.

FIG. 6 is a list showing an example of target road intermediate data.

FIG. 7 is a list showing an example of additional breakpoint data;

FIG. 8 is a list showing an example of target road management unit data (A).

FIG. 9 is a list showing an example of target road management unit data (B).

FIG. 10 is a list showing an example of unnumbered road data.

FIG. 11 is a list showing an example of target road management unit data (C).

FIG. 12 is a list showing an example of a traffic management target road database;

[Explanation of symbols]

 11 First data conversion means 12 Second data conversion means 13 Third data conversion means 14 Fourth data conversion means 15 Fifth data conversion means 101 Digital road map database 102 Detour guidance target road data 103 Target road middle Data 104 Additional breakpoint data 105 Target road management unit data (A) 106 Target road management unit data (B) 107 Unnumbered road data 108 Target road management unit data (C) 109 Traffic management target road database

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int. Cl. ⁷ , DB name) G08G 1/00 G06F 17/30 G06T 1/00 G08G 1/09

Claims (10)

(57) [Claims] 1. A road to be traffic-managed is selected from road attributes of a digital road map database, and a section from a break point such as an intersection to a break point is classified as a management unit, and a road of the management unit is classified based on the road attribute. A ranking is automatically assigned and a management number is automatically assigned, and for each road of the management unit, the destination of the outflow or inflow of the vehicle or the road of the original management unit is registered in the traffic management target road database as a connection road on the end or start end side. How to assign the management number of the road subject to traffic management. 2. The traffic management target according to claim 1, wherein the road management target road is automatically selected using the road type, road width, and the road attribute of the special vehicle traffic system target code included in the digital road map database. Road management number assignment method. 3. A road to be subjected to detour guidance for traffic flow distribution is registered in a detour guidance target road data as a link number of a digital road map database, and a traffic management target road is referred to by referring to the data file. 3. The method for assigning a management number of a road subject to traffic management according to claim 2, wherein the management number is added. 4. The selected roads subject to traffic management are automatically classified as intersections, points at prefectural boundaries, dead ends, and points at secondary mesh boundaries, and the separation points are used as management units. The method for assigning a management number of a traffic management target road according to claim 2 or 3. 5. If it is desired to further separate at a specific point at a point which does not correspond to a breakpoint, register those points as node numbers of a digital road map database in additional breakpoint data and refer to the data. The method for assigning a management number for a traffic-managed road according to claim 4, wherein the road is classified as a management unit. 6. The roads of the divided management units are ranked according to the road type, the line number, the main / slave road division code, the link type, and the road attribute of the coordinates of both ends of the road, and the management number is automatically assigned. The method for assigning a management number for a traffic management target road according to claim 4 or 5. 7. When a road of a divided management unit is an intra-intersection link, a side road link, and a side line link such as SA, which are not more than a certain distance, the road is excluded from a target to which a management number is assigned in order to reduce the management number. The method for assigning a management number of a traffic management target road according to claim 6. 8. For each route of the management unit designated by the management number, for the route of the management unit to which the vehicle flows out for route guidance, the management number is set as the connection road on the terminal side, and the traffic management target road is used. 8. The traffic management target road management according to claim 6, wherein the management number is registered in the traffic management target road database as a connection road on the starting end side with respect to the road of the original management unit into which the vehicle flows. Numbering method. 9. When the connecting road at the terminal end or the starting end is a road to which a management number is not assigned, in order to secure connectivity, a link within an intersection, a side road link, and a side line link such as an SA to which a management number is not assigned is provided. 9. The method according to claim 8, wherein the link number is registered in a traffic management target road database. 10. A digital road map database and detour guidance target road data are input, a traffic management target road is selected from road attributes of the digital road map database and link numbers of detour guidance target road data, and target road intermediate data is obtained. The first data conversion means to be output and the target road intermediate data and the additional breakpoint data are input, and are divided into management units based on the breakpoints such as intersections and the node numbers of the additional breakpoint data, and the target road management is performed. Second data conversion means for outputting the unit data (A) and the target road management unit data (A) as inputs, and deletes links within an intersection, side road links, side road links such as SA, etc., which are within a certain distance or less. Target road management unit data (B)
And third data converting means for outputting unnumbered road data, and the target road management unit data (B),
The roads in the management unit are ranked based on the road type, line number, main / slave road division code, link type, and coordinates of both ends of the road, and the management number is automatically assigned to the target road management unit. A fourth data converting means for outputting data (C), and inputting the target road management unit data (C) and the unnumbered road data as input, and for each road of a management unit designated by a management number, For the road of the outgoing or inflowing destination or the original management unit, search for the management number as the connection road on the end or start side, and if there is an unnumbered road, search for the link number and search for traffic management. A management number assigning device for a traffic management target road, comprising: a fifth data conversion means for outputting a target road database.