CN103632557B - A kind of VMS event information dissemination method and device - Google Patents

Abstract

The invention discloses a kind of VMS event information dissemination method and device, in order to automatically to choose VMS, realization event self organization information is issued, and improves treatment effeciency.Wherein, described VMS event information dissemination method comprises: obtain event information; According to described event information, determine event type and the event class of event; According to the event type determined and event class, from predefined event information conversion table, search corresponding Information issued scope and issue duration, the corresponding relation that described event information conversion table is event type and event class and Information issued scope and issues between duration; According to the Information issued scope found, select to meet pre-conditioned VMS display device; In described issue duration, described event information issued by the VMS display device selected.

Description

Method and device for publishing VMS event information

technical field

The invention relates to the technical field of modern traffic control and guidance, in particular to a VMS event information publishing method and device.

Background technique

In order to alleviate the increasingly serious urban traffic congestion, it is necessary to regulate the travel of motor vehicles, scientifically divert vehicles on congested roads, and reasonably induce travelers to choose the optimal route to spend the least travel time and occupy the least road resources. The existing urban traffic guidance information release and control system is generally based on RTMS, coil detectors, video detectors and other sensor devices to collect traffic flow data in real time. A variety of ways to publish to travelers. At present, the induced information release and control system widely used is the VMS induced information release and control system. The existing urban road VMS information distribution system is generally composed of three parts: the central control system, the communication system and the VMS display equipment in the field. The central control system realizes traffic information processing, guidance information generation, guidance information release control, system management and other functions, the communication system realizes the transmission of released information, and the outfield VMS display equipment installed on urban roads realizes the release and display of traffic guidance information.

VMS usually adopts three forms of graphics, text, and graphics plus text to display information such as road conditions, traffic events, and traffic control measures. When an event occurs on a certain road in the road network, it is usually released through the VMS display device in text form. In the prior art, the manager determines the scope and duration of an event, and releases it through a corresponding VMS display device. This makes the existing VMS information release method greatly affected by human subjective factors, and the processing efficiency is low.

Contents of the invention

Embodiments of the present invention provide a method and device for publishing VMS event information, which are used to automatically select a VMS, realize self-organized publishing of event information, and improve processing efficiency.

An embodiment of the present invention provides a method for publishing VMS event information, including:

Get event information;

Determine the event type and event level of the event according to the event information;

According to the determined event type and event level, look up the corresponding information release range and release duration from the predefined event information conversion table. The event information conversion table is between the event type and event level and the information release range and release time. corresponding relationship;

According to the found information release range, select the VMS display device that meets the preset conditions;

Within the publishing period, the event information is published on the selected VMS display device.

An embodiment of the present invention provides a device for publishing VMS event information, including:

an acquisition unit, configured to acquire event information;

a determining unit, configured to determine the event type and event level of the event according to the event information;

A search unit, configured to search for the corresponding information release range and release duration from a predefined event information conversion table according to the determined event type and event level, the event information conversion table is the event type, event level and information release range Correspondence between release time and release time;

The selection unit is used to select the VMS display device that meets the preset conditions according to the found information release range;

A publishing unit, configured to publish the event information on the selected VMS display device within the publishing time period.

The VMS event information publishing method provided by the embodiment of the present invention acquires event information when an event occurs on the road, determines the event type and event level of the event according to the acquired event information, and searches for the corresponding event information from the predefined event information conversion table. According to the scope and duration of information release, VMS display devices that meet the requirements are selected according to the scope of information release to release within the determined release time. Processing efficiency of information release.

Additional features and advantages of the invention will be set forth in the description which follows, and in part will be apparent from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention may be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.

Description of drawings

The accompanying drawings described here are used to provide a further understanding of the present invention, and constitute a part of the present invention. The schematic embodiments of the present invention and their descriptions are used to explain the present invention, and do not constitute improper limitations to the present invention. In the attached picture:

Fig. 1a is the angle between the road section with connection relationship and the current road section E01 in the embodiment of the present invention;

Figure 1b shows the angle between the unconnected road section and the current road section E01 in the embodiment of the present invention;

Fig. 2 is a schematic diagram of the implementation flow of the VMS event information publishing method in the embodiment of the present invention;

FIG. 3 is a schematic diagram of the implementation process for determining the road section list of the guidance range of each VMS display device in an embodiment of the present invention;

Fig. 4 is a schematic diagram of the implementation process of determining the list of road sections in the scope of an event in an embodiment of the present invention;

FIG. 5 is a schematic diagram of an implementation process for selecting a VMS display device that meets preset conditions in an embodiment of the present invention;

FIG. 6 is a schematic structural diagram of a device for issuing VMS event information in an embodiment of the present invention.

detailed description

In order to realize the automatic release of VMS event information and improve the processing efficiency of event text information release, the embodiments of the present invention provide a VMS event information release method and device.

The preferred embodiments of the present invention will be described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described here are only used to illustrate and explain the present invention, and are not intended to limit the present invention, and in the absence of conflict, the present invention The embodiments and the features in the embodiments can be combined with each other.

In the embodiment of the present invention, the urban road network is described by establishing a node-arc model, and the attribute of the road segment is represented by the arc segment weight, which is formally expressed as:

<math> <mfenced open='{' close='' separators=' '> <mtable> <mtr> <mtd> <mi>G</mi> <mo>=</mo> <mrow> <mo>(</mo> <mi>V</mi> <mo>,</mo> <mi>E</mi> <mo>,</mo> <mi>W</mi> <mo>)</mo> </mrow> </mtd> </mtr> <mtr> <mtd> <mi>V</mi> <mo>=</mo> <mo>{</mo> <msub> <mi>V</mi> <mi>i</mi> </msub> <mo>|</mo> <mn>0</mn> <mo>&amp;le;</mo> <mi>i</mi> <mo>&amp;le;</mo> <mi>n</mi> <mo>-</mo> <mn>1</mn> <mo>,</mo> <mi>n</mi> <mo>&amp;GreaterEqual;</mo> <mn>1</mn> <mo>|</mo> <mo>}</mo> </mtd> </mtr> <mtr> <mtd> <mtext>E={e|e=&lt;i,j>,i,j&amp;Element;V,i&amp;NotEqual;j|}</mtext> </mtd> </mtr> </mtable> <mtext></mtext> </mfenced> </math>

Among them, G represents the road network; V is a non-empty node set, i is a node, and n is the number of nodes;

E is a directed arc set, which represents the directed road segment set of the road network; W is an arc weight set, which represents the weight value of the directed arc segment of the road network. It should be noted that the road sections mentioned in the present invention all refer to directional road sections.

Relationship definitions between road network elements:

According to whether the current road segment is connected to other nodes or road segments, the relationship between road segments is divided into connected relationship and non-connected relationship. The road segment with connection relationship only refers to the situation that the current road segment is connected end to end with other road segments. Only the start point and end point of the road segment are connected with this road segment. In the actual road network, it indicates whether there is a connection relationship between road segments, road segments, and intersections.

The shortest path between the current road segment and other road segments refers to the path starting from the current road segment and going through the least number of road segments to reach the target road segment.

The number of nodes in the shortest path between the current road segment and other road segments refers to the number of nodes included in the path starting from the current road segment and going through the least number of road segments to reach the target road segment.

The angle between the current road segment and other road segments refers to the counterclockwise angle formed by the intersection of the extension line of the end point of the current road segment and the extension line of the starting point of other road segments. Fig. 1a and Fig. 1b respectively show the calculation methods of the included angle between the road segment with connection relation and the road segment without connection relation and the current road segment E01.

The downstream section of the current section means that if the angle between the current section and other sections is α, where The other segments of are all downstream segments of the current segment. In the actual road network, it refers to the downstream section of the section where the VMS (VariableMessageSign, variable message sign) is located. For the upstream road segment of the current road segment, the upstream road segment of the current road segment can be obtained by turning the starting point of the current road segment to find the downstream road segment of the steering road segment, and then turning these downstream road segments.

In the embodiment of the present invention, according to the content of the released event information, the event information is divided into nine categories: severe weather information, faulty vehicle information, management and control information, detour information, construction information, traffic accident information, publicity information, congestion information and Other Information.

In the embodiment of the present invention, it is possible but not limited to divide each type of event information above into three levels according to the event level (R), and each level of event information under each category corresponds to different release scopes and release durations. The range (N') is the number of nodes on the shortest path between the incident road section and the farthest affected road section, and the release time (T) is the time period for the event information to be displayed on the VMS after it is converted into text information. According to the cluster analysis of the event information release history database, the release range (N’) and release time (T) of different event types and different event levels are determined, and the event information conversion table shown in Table 1 is established accordingly:

Table 1

During specific implementation, the release ranges and release durations corresponding to different categories and different levels of event information may be the same, but the release ranges and release durations corresponding to different levels of event information under the same category should be different.

In the actual road network, for example, there are traffic incidents that often affect the upstream road section of the accident road section. The number of intersections between the accident road section and the affected road section is used to measure the impact range of the event. The upstream road segments whose number of intersections is less than the above number are all affected road segments.

It can be seen from Table 1 that the main factors affecting the release of event information are the release scope and duration of event information. Event levels are positively correlated with release scope and release duration. The higher the event level, the larger the scope and duration of the release; otherwise, the smaller. The degree of impact is negatively correlated with the number of intersections contained between the incident road segment and the affected road segment. The greater the number of intersections between the incident road segment and the affected road segment, the smaller the impact of the road segment event; on the contrary, the greater it is. Accordingly, in the embodiment of the present invention, the model of the road section affected by the event is established according to the two factors of the event level, the number of road section intersections included between the incident road section and the affected road section, so as to select the road section set that is most affected by the event. The built model looks like this: Among them, E is a set of directed arcs, which represents the set of directed roads in the road network; R represents the type of event and the corresponding level; W'∈N;N' _ij ∈N, and W' represents the weight of the event level, N' _ij is the number of nodes contained in the shortest path between the event-occurring road segment and any road segment E _ij , indicating the number of intersections between the event-occurring road segment and the affected road segment.

Based on this, as shown in FIG. 2, it is a schematic diagram of the implementation flow of the VMS event information publishing method provided by the embodiment of the present invention, which may include the following steps:

S201. Obtain event information;

S202. Determine the event type and event level of the event according to the event information;

During specific implementation, when an event occurs, the event information is read and the event type and event level of the event are determined, so as to determine the release range and release duration of the event information according to the time information conversion table.

S203. According to the determined event type and event level, search for the corresponding information release range and release duration from the predefined event information conversion table;

Specifically, the event information conversion table may be as shown in Table 1, which is the corresponding relationship between the event type and event level, and the information release scope and release duration;

S204. Select a VMS display device that satisfies the preset condition according to the found information release range;

S205. Publish the event information on the selected VMS display device within the publishing time period.

Wherein, in step S204, the VMS device that satisfies the preset condition can be selected according to the method: for each VMS display device set in the road network, determine the list of road sections in the induction range of the VMS display device; according to the found information release range, Determine the list of road sections in the scope of the event; for each road section included in the list of road sections in the scope of the event, determine whether the road section belongs to the road section included in the induced range road section list of any VMS display device; if so, determine the VMS display device to which the road section belongs It is a VMS device that meets the preset conditions.

Specifically, as shown in Figure 3, the induction range list of each VMS device can be determined according to the following steps:

S301. Determine that the road section where the VMS display device is located is the current road section;

S302, sequentially accessing a road segment connected to the current road segment;

S303, judging whether the section has been visited, if yes, execute step S304, otherwise execute step S305;

S304. Determine whether each road segment connected with the current road segment has been visited, if yes, execute step S310, otherwise, execute step S302;

S305. Set the section as visited;

S306. Determine whether the road section is a downstream road section of the road section where the VMS display device is located, if yes, execute step S307, otherwise, execute step S302;

S307, judging whether there are other VMS display devices on the road section, if yes, execute step S302, otherwise, execute S308;

S308. Continue to judge whether the number of important functional road sections included in the shortest path between the road section and the road section where the VMS display device is located is less than a preset value, if yes, execute step S309, otherwise, execute step S302;

S309. Add the segment to the list of induced range segments;

S310. Determine whether each road segment contained in the road segment list of the guiding range has been visited, if yes, the process ends, otherwise, execute step S311;

S311 , sequentially accessing each road segment contained in the list of induced range road segments, determining the road segment as the current road segment, and executing step S302 .

During specific implementation, the event information can also include the road section information where the incident occurred. Based on this, as shown in Figure 4, the list of road sections in the scope of the incident can be determined according to the following steps:

S401. Determine the turning section of the incident section, and determine the turning section as the current section;

S402. Read a road segment connected to the current road segment in sequence;

S403, judging whether the section is visited, if yes, execute step S404, otherwise, execute step S405;

S404. Determine whether all road sections connected with the current road section have been visited, if yes, execute step S409, otherwise, execute step S402;

S405. Set the section as visited;

S406. Determine whether the road section is a road section downstream of the turning accident road section, if yes, execute step S407, otherwise execute step S402;

S407. Judging whether the number of nodes included in the shortest path between the road section and the turning accident road section does not exceed a preset value, if yes, execute step S408, otherwise, execute step S402;

S408. Add the road section to the initial event impact range list;

S409. Determine whether all the road sections included in the list of initial event impact ranges have been visited, if yes, perform step S410, otherwise, perform step S411;

S410 , divert each road segment contained in the initial event-influenced range road segment list to obtain the event-affected range road segment list, and the process ends.

S411 , sequentially accessing a road segment contained in the road segment list of the initial event affected range, determining that the road segment is the current road segment, and executing step S402 .

Based on the list of VMS induction range road sections and the list of event affected range road sections determined above, as shown in Figure 5, you can follow the steps to select a VMS display device that meets the preset conditions:

S501. For each VMS display device, read the road section list of the induction range of the VMS display device;

S502. Add a VMS identifier for each VMS display device to form a list of VMS identifiers;

Wherein, the VMS identifier may be, but not limited to, display device serial number information for the VMS.

S503. Read the list of event impact ranges;

S504. Access one VMS identifier in the VMS identifier list in sequence;

S505. Determine whether the VMS identifier has been visited, if yes, perform step S509, otherwise, perform step S506;

S506. Set the VSM identifier as accessed;

S507. Judging whether the induced range segment list of the VMS device corresponding to the VMS identifier and the event affected range segment list include the same segment, if yes, execute step S508, otherwise, execute step S504;

S508. Add the VMS identifier to the VMS list for event information release;

S509. Determine whether each VMS identifier included in the VMS identifier list has been accessed, if yes, execute step S510, otherwise, execute step S504;

S510. Determine that the VMS display device corresponding to the VMS identifier contained in the VMS list issued by the event information is a VMS display device that meets the condition.

During specific implementation, after a VMS display device meeting the conditions is selected, the event information may be published on the selected VMS display device.

Based on the same inventive concept, the embodiment of the present invention also provides a device for publishing VMS event information. Since the problem-solving principle of the above-mentioned device is similar to the method for publishing VMS event information, the implementation of the above-mentioned device can refer to the implementation of the method. No longer.

As shown in FIG. 6, it is a schematic structural diagram of a VMS event information release device provided by an embodiment of the present invention, including:

An acquisition unit 601, configured to acquire event information;

A determining unit 602, configured to determine the event type and event level of the event according to the event information acquired by the acquiring unit 601;

The search unit 603 is configured to search for the corresponding information release range and release duration from a predefined event information conversion table according to the event type and event level determined by the determination unit 602. The event information conversion table is the event type and event level The corresponding relationship with the scope and duration of information release;

A selection unit 604, configured to select a VMS display device that satisfies preset conditions according to the information distribution range found by the search unit 603;

The publishing unit 605 is configured to publish the event information on the VMS display device selected by the selecting unit 604 within the publishing time period.

During specific implementation, the selection unit 604 may include:

The first determining subunit is used to determine the list of road segments in the induced range of the VMS display device for each VMS display device set in the road network;

The second determining subunit is used to determine the list of road sections in the range affected by the event according to the found information release range;

The judging subunit is used for judging, for each VMS display device, whether the road segment list of the induced range of the VMS display device and the list of road segments affected by the event include the same road segment;

The third determination subunit is configured to determine that the VMS display device is a VMS device that satisfies a preset condition when the determination result of the determination subunit is yes.

Among them, the first determining subunit is specifically used to determine the induction range list of each VMS display device according to the following method: determine that the road section where the VMS display device is located is the current road section, and perform steps A1-A6: A1, for connections with the current road section For each section of the relationship, determine whether the section has been visited, if not, execute step A2, if so, the process ends; A2, mark the section as visited; A3, judge whether the section is the section where the VMS display device is located Downstream road section, if so, execute step A4, if no, process ends; A4, judge whether there are other VMS display devices on this road section, if so, process end, if not, perform step A5; A5, continue to judge this road section and described VMS Display whether the number of important functional road sections included in the shortest path between the road sections where the device is located is less than the first preset value, if yes, perform step A6, if not, the process ends; A6, add the road section to the list of road sections in the induced range ; and for each road segment contained in the list of road segments within the guidance range, sequentially determine the road segment as the current road segment, and execute steps A1-A6.

During specific implementation, the event information includes incident road section information; and the second determination subunit is specifically used to determine the list of road sections in the scope of the event affected by the following method: according to the incident road section information, determine the turning section of the incident road section, determine The road section where the turning accident occurred is the current road section, and steps B1-B5 are executed: B1, for each road section connected with the current road section, determine whether the road section has been visited, if not, perform step B2, if so, The process ends; B2, marking the road section as visited; B3, judging whether the road section is the downstream road section of the turning accident road section, if so, performing step B4, if not, the process ends; B4, judging the road section and the turning Whether the number of nodes contained in the shortest path between the incident road sections is less than the second preset value, if yes, perform step B5, if not, the process ends; B5, add the road section to the list of road sections in the initial event affected range; and For each road section included in the road section list of the scope of influence of the initial event, determine the road section as the current road section, and perform steps B1 to B5; turn each road section included in the road section list of the scope of influence of the initial event, and obtain List of road segments affected by the event.

The VMS event information publishing method provided by the embodiment of the present invention acquires event information when an event occurs on the road, determines the event type and event level of the event according to the acquired event information, and searches for the corresponding event information from the predefined event information conversion table. According to the scope and duration of information release, VMS display devices that meet the requirements are selected according to the scope of information release to release within the determined release time. Processing efficiency of information release.

Those skilled in the art should understand that the embodiments of the present invention may be provided as methods, systems, or computer program products. Accordingly, the present invention can take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the present invention may take the form of a computer program product embodied on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) having computer-usable program code embodied therein.

The present invention is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It should be understood that each procedure and/or block in the flowchart and/or block diagram, and combinations of procedures and/or blocks in the flowchart and/or block diagram can be realized by computer program instructions. These computer program instructions may be provided to a general purpose computer, special purpose computer, embedded processor, or processor of other programmable data processing equipment to produce a machine such that the instructions executed by the processor of the computer or other programmable data processing equipment produce a Means for realizing the functions specified in one or more steps of the flowchart and/or one or more blocks of the block diagram.

These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing apparatus to operate in a specific manner, such that the instructions stored in the computer-readable memory produce an article of manufacture comprising instruction means, the instructions The device realizes the function specified in one or more procedures of the flowchart and/or one or more blocks of the block diagram.

These computer program instructions can also be loaded onto a computer or other programmable data processing device, causing a series of operational steps to be performed on the computer or other programmable device to produce a computer-implemented process, thereby The instructions provide steps for implementing the functions specified in the flow chart flow or flows and/or block diagram block or blocks.

While preferred embodiments of the present invention have been described, additional changes and modifications can be made to these embodiments by those skilled in the art once the basic inventive concept is appreciated. Therefore, it is intended that the appended claims be construed to cover the preferred embodiment as well as all changes and modifications which fall within the scope of the invention.

Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalent technologies, the present invention also intends to include these modifications and variations.

Claims (4)

1. a VMS event information dissemination method, is characterized in that, comprising:

Obtain event information;

According to described event information, determine event type and the event class of event;

According to the event type determined and event class, from predefined event information conversion table, search corresponding Information issued scope and issue duration, the corresponding relation that described event information conversion table is event type and event class and Information issued scope and issues between duration;

According to the Information issued scope found, select to meet pre-conditioned changeable-message sign VMS display device, specifically comprise: for each the VMS display device arranged in road network, determine the induction scope section list of this VMS display device, concrete, determine the induction range list of each VMS display device in accordance with the following methods: determine that section, VMS display device place is current road segment, and perform steps A 1 ~ A6:A1, each section of annexation is had for current road segment, judge that whether this section is accessed, if not, perform steps A 2, if, flow process terminates, A2, mark this section for access, A3, judge that whether this section is the downstream road section in section, VMS display device place, if so, perform steps A 4, if not, flow process terminates, A4, judge whether this section there is other VMS display device, if so, flow process terminates, if not, perform steps A 5, whether the critical function section quantity that A5, the shortest path that continues to judge between this section and section, described VMS display device place comprise is less than the first preset value, if so, execution steps A 6, and if not, flow process terminates, A6, this section is added in described induction scope section list, and for each section that described induction scope section list comprises, determine that this section is current road segment successively, and perform steps A 1 ~ A6, and according to the Information issued scope found, determine the section list of events affecting scope, for each VMS display device, judge whether the induction scope section list of this VMS display device and the section list of events affecting scope comprise same section, if so, determine that this VMS display device is meet pre-conditioned VMS equipment,

In described issue duration, described event information issued by the VMS display device selected.

2. the method for claim 1, is characterized in that, comprises incident road section information in described event information; And

According to the Information issued scope found, determine the section list of events affecting scope, specifically comprise:

According to described incident road section information, that determines incident section turns to section, turns to incident section to be current road segment, and perform step B1 ~ B5 described in determining:

B1, have each section of annexation for described current road segment, judge that whether this section is accessed, if not, perform step B2, if so, flow process terminates;

B2, mark this section for access;

B3, judge this section whether for described in turn to the downstream road section in incident section, if so, perform step B4, if not, flow process terminates;

B4, judge whether this section and the described node quantity turning to the shortest path between incident section to comprise are no more than the second preset value, if so, perform step B5, if not, flow process terminates;

B5, this section is added in the section list of primary event coverage;

For each section comprised in described primary event coverage section list, determine that this section is current road segment, and perform step B1 ~ B5;

Each section comprised in described primary event coverage section list is turned to, obtains the section list of events affecting scope.

3. a VMS event information distributing device, is characterized in that, comprising:

Acquiring unit, for obtaining event information;

Determining unit, for according to described event information, determines event type and the event class of event;

Search unit, the event type determined for basis and event class, from predefined event information conversion table, search corresponding Information issued scope and issue duration, the corresponding relation that described event information conversion table is event type and event class and Information issued scope and issues between duration;

Selection unit, for the Information issued scope that basis finds, select to meet pre-conditioned VMS display device, comprise: first determines subelement, for for each the VMS display device arranged in road network, determine the induction scope section list of this VMS display device, specifically for determining the induction range list of each VMS display device in accordance with the following methods: determine that section, VMS display device place is current road segment, and perform steps A 1 ~ A6:A1, each section of annexation is had for current road segment, judge that whether this section is accessed, if not, perform steps A 2, if, flow process terminates, A2, mark this section for access, A3, judge that whether this section is the downstream road section in section, described VMS display device place, if so, perform steps A 4, if not, flow process terminates, A4, judge whether this section there is other VMS display device, if so, flow process terminates, if not, perform steps A 5, whether the critical function section quantity that A5, the shortest path that continues to judge between this section and section, described VMS display device place comprise is less than the first preset value, if so, execution steps A 6, and if not, flow process terminates, A6, this section is added in described induction scope section list, and for each section that described induction scope section list comprises, determine that this section is current road segment successively, and perform steps A 1 ~ A6, second determines subelement, for according to the Information issued scope found, determines the section list of events affecting scope, judgment sub-unit, for for each VMS display device, judges whether the induction scope section list of this VMS display device and the section list of events affecting scope comprise same section, 3rd determines subelement, for when the judged result of described judgment sub-unit is for being, determines that this VMS display device is meet pre-conditioned VMS equipment,

Release unit, in described issue duration, described event information is issued by the VMS display device selected.

4. device as claimed in claim 3, is characterized in that, comprise incident road section information in described event information; And

Described second determines subelement, specifically for determining the section list of events affecting scope in accordance with the following methods: according to described incident road section information, that determines incident section turns to section, turn to incident section to be current road segment described in determining, and perform step B1 ~ B5:B1, have each section of annexation for described current road segment, judge that whether this section is accessed, if not, perform step B2, if so, flow process terminates; B2, mark this section for access; B3, judge this section whether for described in turn to the downstream road section in incident section, if so, perform step B4, if not, flow process terminates; B4, judge whether this section and the described node quantity turning to the shortest path between incident section to comprise are less than the second preset value, if so, perform step B5, if not, flow process terminates; B5, this section is added in the section list of primary event coverage; And for each section comprised in described primary event coverage section list, determine that this section is current road segment, and perform step B1 ~ B5; Each section comprised in described primary event coverage section list is turned to, obtains the section list of events affecting scope.