CN113780783A - Automatic analysis method for risk degree of road traffic safety accident - Google Patents
Automatic analysis method for risk degree of road traffic safety accident Download PDFInfo
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Abstract
The embodiment of the invention discloses an automatic analysis method for the risk degree of a road traffic safety accident, relates to the technical field of traffic systems and quantitative risk assessment, and can improve the efficiency of professional evaluators. The invention comprises the following steps: the system comprises an input subsystem, a data acquisition subsystem, a database, a calculation subsystem, a result output subsystem and matched hardware; the data acquisition subsystem transmits the acquired road planning design data sheet and the road traffic accident data sheet to a database and stores the data sheet; the input subsystem receives the evaluation object, the evaluation time range and the evaluation index and transmits the evaluation object, the evaluation time range and the evaluation index to the calculation subsystem, and the calculation subsystem generates the current accident risk of the current year, the highest allowable accident risk of the current year and the current accident risk of the current year and summarizes the current accident risk of the current year according to the unit road sections or the unit time to obtain summarized data; and the result output subsystem determines the selected target area road and acquires the accident risk degree evaluation result of the target area road by using the collected data.
Description
Technical Field
The invention relates to the technical field of traffic systems and quantitative risk assessment, in particular to an automatic analysis method for the risk degree of a road traffic safety accident.
Background
The Risk of the road traffic safety accident (Risk) refers to the combination of the Probability of occurrence of the road traffic safety accident (Probasic) and the severity of the consequences (Loss), and the Risk of the road traffic safety accident is evaluated on one hand to evaluate the Probability of occurrence of the accident and on the other hand to evaluate the severity of the consequences possibly caused after the occurrence of the road traffic safety accident.
At present, the road safety risk assessment in the traffic field mainly depends on regular assessment by professional technicians, on one hand, the overall traffic accident is macroscopically analyzed, the development trend conditions of macroscopic traffic accidents in the whole country, in a certain province and the like are reported, the accident occurrence development trend of a specific road network or a specific road section cannot be subdivided, and the specificity and the real-time performance are not enough; on the other hand, the special risk assessment analysis is carried out on key points such as bridges and tunnels on the highway, only the local risk condition of a highway system can be assessed, all road sections of the highway and even regional road networks cannot be covered, and the comprehensive coverage is not achieved; in addition, the adopted benchmarks of various risk assessment methods are not uniform, so that the assessment results are not uniform, and the application range is limited.
With the development of intelligent traffic and intelligent road technology, how to evaluate the safe operation risk condition of the whole road network by means of advanced informatization technology to assist manual work, and improve the automation degree in road traffic safety control becomes a problem needing further research.
Disclosure of Invention
The embodiment of the invention provides an automatic analysis method for the risk degree of a road traffic safety accident, which can improve the efficiency of professional evaluators, and can automatically acquire, calculate and output the accurate distribution condition of the road traffic safety risk of a road network in the whole area only by little input.
In order to achieve the above purpose, the embodiment of the invention adopts the following technical scheme:
an automatic analysis method for road traffic safety accident risk, the method being performed by a safety accident risk assessment system comprising: the system comprises an input subsystem (1), a data acquisition subsystem (2), a database (3), a calculation subsystem (4) and a result output subsystem (5);
the data acquisition subsystem (2) transmits the acquired road planning design data sheet and the road traffic accident data sheet to the database (3) and stores the data sheet;
the input subsystem (1) receives an evaluation object, an evaluation time range and an evaluation index and transmits the evaluation object, the evaluation time range and the evaluation index to the calculation subsystem (4), and the calculation subsystem (4) generates the current accident risk of the current year, the highest allowable accident risk of the current year and the current accident risk of the current year, and summarizes the current accident risk of the current year according to unit road sections or unit time to obtain summarized data;
and the result output subsystem (5) determines the selected target area road, and acquires the accident risk degree evaluation result of the target area road by using the collected data.
The road planning design data sheet collected by the data collection subsystem (2) comprises: road section geographic information, start and stop points of a road, million kilometer accident descent rate of the road, road traffic flow and road basic design information;
the road traffic accident data sheet collected by the data collection subsystem (2) comprises: the time, the place, the geographical position, the road section, the accident type, the number of dead people, the number of serious injury people, the number of light injury people, the direct economic loss and the accident investigation report of the road traffic accident.
The computing subsystem (4) comprises: the system comprises a unit road section annual accumulated million vehicle kilometer accident rate calculation module (401), a unit road section unit time period annual accumulated accident consequence calculation module (402), a unit road section unit time period accident index and related parameter calculation module (403), a unit road section unit time period annual accident consequence calculation module (404) and a unit road section annual million vehicle kilometer accident rate calculation module (405);
the computing subsystem (4) further comprises: a unit section unit time interval current accident risk calculation module (406) in the current year, a unit section unit time interval highest allowable accident risk calculation module (407) in the current year, and a unit section unit time interval current accident risk calculation module (408) in the current year;
the computing subsystem (4) further comprises: the system comprises a road section \ route \ road network current annual accident risk calculation module (409), a road section \ route \ road network highest allowable risk calculation module (410) and a road section \ route \ road network current annual accident risk calculation module (411).
With the development of intelligent traffic and intelligent road technology, how to assist the manual work to evaluate the safe operation risk condition of the whole road network by means of advanced information technology, improve the coverage, the specialty, the real-time property and the universality of risk evaluation, and carry out accurate transportation, smooth and safe traffic construction of traffic transportation, and have important practical and social significance. According to the automatic analysis method for the road traffic safety accident risk degree provided by the embodiment, the road traffic safety accident risk degree in the unit section of the unit road section is obtained through automatic evaluation and calculation of the road traffic safety accident risk degree, and the road traffic safety risk distribution condition of the whole regional road network is further obtained. According to the embodiment, the accurate distribution condition of the road traffic safety risks of the road network in the whole region can be automatically acquired, calculated and output only by a small amount of input, the risks are evaluated by adopting the relative indexes of the road traffic safety accident risk degree, and the efficiency, the coverage, the specialty, the real-time performance and the universality of the road traffic safety risk evaluation are greatly improved. The method is favorable for accurately analyzing the overall accident risk profile of the road network, and then the macroscopic regulation and control of the road network are carried out by reasonably arranging measures such as road traffic plan, dispersion, management and the like, so that the overall safe operation condition of the road network is guaranteed.
Compared with the prior art, this embodiment is through the calculation to road traffic incident risk: the depth of road safety risk assessment can be improved, and kilometer-level road section risk assessment can be accurately achieved; the coverage of road safety risk assessment can be improved, and the full road network can be comprehensively and automatically assessed and analyzed; the efficiency of professional evaluators can be improved, and the accurate distribution condition of the road traffic safety risks of the road network in the whole area can be automatically acquired, calculated and output only by few inputs; the dependence degree of a road transportation supervision department on professional technicians can be greatly reduced, and the cost of professional consultation and consultant is reduced; in practical application, the method can provide high-risk road section distribution conditions for government regulatory departments, is helpful for assisting and reasonably arranging measures such as road traffic plans, dispersion, management and the like to carry out macroscopic regulation and control on the road network, and guarantees the overall safe operation condition of the road network.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic diagram of a system architecture according to an embodiment of the present invention;
fig. 2 is a schematic diagram of a specific architecture of a system according to an embodiment of the present invention.
Detailed Description
In order to make the technical solutions of the present invention better understood, the present invention will be described in further detail with reference to the accompanying drawings and specific embodiments. Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention. As used herein, the singular forms "a", "an", "the" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises" and/or "comprising," when used in this specification, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof. It will be understood that when an element is referred to as being "connected" or "coupled" to another element, it can be directly connected or coupled to the other element or intervening elements may also be present. Further, "connected" or "coupled" as used herein may include wirelessly connected or coupled. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items. It will be understood by those skilled in the art that, unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the prior art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.
The embodiment of the invention provides an automatic analysis method for the risk degree of a road traffic safety accident, which is executed by a safety accident risk degree evaluation system, wherein the safety accident risk degree evaluation system comprises: the system comprises an input subsystem (1), a data acquisition subsystem (2), a database (3), a calculation subsystem (4) and a result output subsystem (5).
The data acquisition subsystem (2) transmits the acquired road planning design data sheet and the road traffic accident data sheet to the database (3) for storage, and particularly, the data acquisition subsystem (2) can acquire information from databases of organizations, departments and companies such as traffic, management and insurance organizations, and interfaces used for acquisition are corresponding to external data interfaces of the organizations, departments and companies.
The input subsystem (1) receives the evaluation object, the evaluation time range and the evaluation index and transmits the evaluation object, the evaluation time range and the evaluation index to the calculation subsystem (4), and the calculation subsystem (4) generates the current accident risk of the current year, the highest allowable accident risk of the current year and the current accident risk of the current year, and summarizes the current accident risk of the current year according to the unit road sections or the unit time to obtain summarized data. The input subsystem (1) receives an evaluation object, an evaluation time range and an evaluation index which are input by technicians through administrator terminals (such as terminal equipment of staff of a traffic control center) or other equipment, wherein the evaluation object can select a unit road section, a route or a regional road network; the evaluation time range is in hours, the maximum time can be selected to be 24 hours, and the evaluation index comprises the current accident risk of the evaluation object in the evaluation time range in the current year, the current accident risk and the current maximum allowable accident risk as a control. The calculation subsystem (4) automatically calculates the current accident risk of the unit road section unit time in the current year, the highest allowable accident risk of the current year and the current accident risk of the current year according to the evaluation object (road section, route or road network), the evaluation time range and the evaluation index input by the input subsystem (1), and can summarize the unit road sections according to time or the unit road sections.
And the result output subsystem (5) determines the selected target area road, and acquires the accident risk degree evaluation result of the target area road by using the collected data. The accident risk evaluation result may include: the selected road section \ route \ road network current accident risk distribution in the current year, current accident risk distribution in the current year and the highest allowable accident risk in the current year. Specifically, the modules arranged in the result output subsystem (5) comprise a current accident risk output module, a current accident risk output module and a highest allowable accident risk output module of the evaluation object (road section, route and road network) in the current year, and can be output through a large screen, a terminal computer and a mobile phone APP. And outputting the selected road section \ route \ road network current accident risk distribution in the current year, current accident risk distribution in the current year and the highest allowable accident risk in the current year through a result output subsystem (5).
In this embodiment, the road planning and design data table collected by the data collection subsystem (2) includes: road section geographic information, start and stop points of roads, million kilometer accident descent rate of roads, road traffic flow and road basic design information. The road traffic accident data sheet collected by the data collection subsystem (2) comprises: the time, the place, the geographical position, the road section, the accident type, the number of dead people, the number of serious injury people, the number of light injury people, the direct economic loss and the accident investigation report of the road traffic accident. Specifically, the risk degree of one road includes the ratio of the traffic safety risk of the one road to the social allowable safety risk. Wherein the road traffic safety risk comprises the product of the probability that the accident has occurred in the road traffic and the loss caused by the accident. The socially tolerable security risks of this road include: the product of the socially tolerable probability of an accident and the severity of the consequences of the accident.
The data acquisition subsystem (2) can access a third party database, and the third party database comprises a database of a management department and a database of an insurance institution. The data acquisition subsystem (2) comprises a traffic accident, comprehensive traffic planning, road geographic information and traffic flow data access module for acquiring data from a traffic department. The system comprises a traffic accident investigation report data access module for collecting data from a management department and a traffic accident payment data access module for collecting data from an insurance institution.
In this embodiment, the calculation subsystem (4) includes: the system comprises a unit road section annual accumulated million vehicle kilometer accident rate calculation module (401), a unit road section unit time period annual accumulated accident consequence calculation module (402), a unit road section unit time period accident index and related parameter calculation module (403), a unit road section unit time period annual accident consequence calculation module (404) and a unit road section annual million vehicle kilometer accident rate calculation module (405). The unit section unit time interval current accident risk calculation module comprises a unit section unit time interval current accident risk calculation module (406), a unit section unit time interval highest allowable accident risk calculation module (407) in the current year, and a unit section unit time interval current accident risk calculation module (408). The system comprises a road section \ route \ road network current annual accident risk calculation module (409), a road section \ route \ road network highest allowable risk calculation module (410) and a road section \ route \ road network current annual accident risk calculation module (411).
Specifically, in a current accident risk degree calculation module (411) of the current year of the road section/route/road network, R is calculatedrΔWΔtAggregating according to road sections, and obtaining the road safety accident risk degree distribution of the road sections, the road lines and the road network in the time period, wherein:
RrΔtin order to evaluate the current accident risk degree of a road section, a route or a road network in the period of delta t in the current year, wherein,
when R isrΔtWhen the risk degree of the road traffic safety accident is less than or equal to 1, the risk degree of the road traffic safety accident is in a controllable and allowable range, the smaller the risk degree is, the lower the risk degree is, and otherwise, the risk degree of the road traffic safety accident is largeIn 1, the road traffic safety accident risk degree exceeds the allowable range, and the greater the risk, the higher the possibility of accident. RrΔWΔtAnd W is the total road mileage of the evaluation road section, the route or the road network for evaluating the current accident risk degree of the unit road section divided in the road section in the current year.
ΔW＝Wend-WstartFor estimating the road length of the divided unit section in the section, the starting point W of the unit section in the road operation basic data table is passedstartAnd end point WendThe length of the road between the two roads is given as WstartAnd WendStarting point and end point of evaluation object selected by user through safety accident risk evaluation input subsystem, where t is tend-tstartThe time period derived for the evaluation of the start and end times is typically a whole hour, tstartAnd tendAnd the start time and the end time of the evaluation time range selected by the safety accident risk evaluation input subsystem for the user.
Calculating the current accident risk degree of the unit section unit time period in the current year in a unit section unit time period current accident risk degree calculation module (408), wherein,
RΔWΔtfor evaluating the current accident risk in the current year of unit road section unit time period divided in the road section, RpΔWΔtThe highest allowable accident risk in the current year is evaluated in the unit road section unit time period divided in the road section.
In a unit section unit time interval current accident risk calculation module (406), calculating unit section unit time interval current accident risk in the current year, wherein RΔWΔt＝PΔW×LΔWΔt，PΔWAccumulating million kilometers accident rate L for the current year of unit road sections divided in the evaluation road sectionΔWΔtAnd accumulating accident consequences for the current year of unit section unit time periods divided in the evaluation section.
In a module (401) for calculating the accident rate of the unit road section accumulated in million cars per kilometer in the current year, wherein:
In a unit section unit time period current year accumulated accident consequence calculation module (402), calculating a unit section unit time period current year accumulated accident consequence, wherein:
and calculating the accident record of the accident occurrence time in the road traffic accident data table during the current year.
Unit section unit time intervalIn the highest allowable accident risk calculation module (407) of the current year, the highest allowable accident risk of the current year in the unit section unit time period is calculated, wherein RpΔWΔt＝PpΔW×LpΔWΔt，PpΔWIs the traffic accident rate index of the unit road section in the current year,
LpΔWΔt＝LlΔWΔtx (1-setting million vehicles per kilometer accident descent rate in the same year) is the highest allowable accident consequence loss in the unit time interval of the unit road section in the current year, LlΔWΔtThe annual accident consequence loss over the unit time period of the unit section.
In an annual accident consequence calculation module (404) over a unit segment unit time period, an annual accident consequence over a unit segment unit time period is calculated, wherein:
and calculating the accident records in the road traffic accident data table, wherein the accident occurrence time of the last year is the unit time period of the unit road section, and the accident records are obtained during the unit time period of each day. The direct economic loss of the accident comes from all accident records of the road traffic accident data sheet. The average traffic flow of the unit section in the unit time period range is obtained by the average traffic flow of the section in the time period range of the last year in the road operation basic data table.
In a unit section unit time interval accident index and related parameter calculation module (403), calculating a unit section current year traffic accident rate index, wherein:
wherein, PpΔWThe traffic accident rate index of the unit road section in the current year is obtained;
PlΔWthe annual million-vehicle-kilometer accident rate on the unit road section is calculated by the formula
Wherein the number of accidents occurring in the unit section in the last year is obtained by calculating the accident record of the accident occurrence time in the road traffic accident data sheet during the last year.
The calculation mode of the accident rate adjustment coefficient in the unit time interval is as follows:
wherein, muΔtThe accident rate adjustment factor is Δ t for a unit time period. And calculating the number of accident records of the accident occurrence time within the time range of delta t in the road traffic accident data table. The number of accidents occurring all day is obtained by calculating the number of all accident records in the road traffic accident data table.
In a current accident risk calculation module (409) of the current year of the road section/route/road network, R is calculatedΔWΔtAggregating according to road sections, and calculating to obtain the road safety accident risk degree distribution of a certain road section, a certain route and a certain time interval of a road network, wherein the calculation mode is as follows:
wherein R isΔtThe current accident risk of the road section in the time period delta t in the current year is evaluated.
In the unit section unit time interval unit year highest allowable accident risk calculation module (407), R is pairedpΔwΔtAggregating according to road sections, and calculating to obtain the road safety accident risk degree distribution of a certain road section, a certain route and a certain time interval of a road network, wherein the calculation mode is as follows:
wherein R ispΔtFor evaluating road sections, routes, or road networks at Δ tThe year of the segment is the highest tolerable risk of accident.
The method of the embodiment is implemented by an automatic evaluation and calculation system for the risk degree of the road traffic safety accident as shown in fig. 1 and 2. The system comprises a safety accident risk degree evaluation data acquisition subsystem, a traffic accident investigation report data access module and a traffic accident payment data access module, wherein the safety accident risk degree evaluation data acquisition subsystem comprises a traffic accident, comprehensive traffic planning, road geographic information and traffic flow data access module for acquiring data from a traffic department, the traffic accident investigation report data access module for acquiring data from a management department and the traffic accident payment data access module for acquiring data from an insurance institution. The safety accident risk degree evaluation database comprises a road planning and designing data table and a road traffic accident data table, wherein the road planning and designing data table comprises road section geographic information, a road starting point and a road stopping point, a road million kilometer accident descent rate, road traffic flow and road basic design information, and the road traffic accident data table comprises time, a place, a geographic position, a road section, an accident type, the number of dead people, the number of serious injury people, the number of light injury people, direct economic loss and an accident investigation report of a road traffic accident.
The safety accident risk degree evaluation input subsystem comprises an evaluation object, an evaluation time range and an evaluation index, wherein the evaluation object can select a unit road section, a route or an area road network, the evaluation time range is in hours, the maximum evaluation time range can be 24 hours, and the evaluation index comprises the current accident risk of the evaluation object in the evaluation time range in the current year, the current accident risk and the current maximum allowable accident risk serving as a comparison.
In the scheme of this embodiment, the collected traffic accident data and road design data of the traffic, management and insurance mechanism may be stored in the safety accident risk assessment database through data transmission, then the current accident risk of the unit road section unit time in the current year, the highest allowable accident risk of the current year and the current accident risk of the current year are automatically calculated according to the assessment object (road section, route or road network), the assessment time range and the assessment index input by the safety accident risk assessment input subsystem, and summarized according to time or unit road sections, and then the selected road section \ route \ road network current accident risk distribution in the current year, current accident risk distribution in the current year and the highest allowable accident risk in the current year are output. Therefore, the accurate distribution condition of the road traffic safety risks of the road network in the whole region can be automatically acquired, calculated and output only by a small amount of input, and the efficiency, the coverage, the specialty and the real-time performance of the road traffic safety risk assessment are greatly improved.
The embodiments in the present specification are described in a progressive manner, and the same and similar parts among the embodiments are referred to each other, and each embodiment focuses on the differences from the other embodiments. In particular, for the apparatus embodiment, since it is substantially similar to the method embodiment, it is relatively simple to describe, and reference may be made to some descriptions of the method embodiment for relevant points. The above description is only for the specific embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (10)
1. An automatic analysis method for road traffic accident risk, characterized in that the method is executed by a safety accident risk assessment system, which comprises: the system comprises an input subsystem (1), a data acquisition subsystem (2), a database (3), a calculation subsystem (4) and a result output subsystem (5);
the data acquisition subsystem (2) transmits the acquired road planning design data sheet and the road traffic accident data sheet to the database (3) and stores the data sheet;
the input subsystem (1) receives an evaluation object, an evaluation time range and an evaluation index and transmits the evaluation object, the evaluation time range and the evaluation index to the calculation subsystem (4), and the calculation subsystem (4) generates the current accident risk of the current year, the highest allowable accident risk of the current year and the current accident risk of the current year, and summarizes the current accident risk of the current year according to unit road sections or unit time to obtain summarized data;
and the result output subsystem (5) determines the selected target area road, and acquires the accident risk degree evaluation result of the target area road by using the collected data.
2. The method according to claim 1, wherein the road planning design data sheet collected by the data collection subsystem (2) comprises: road section geographic information, start and stop points of a road, million kilometer accident descent rate of the road, road traffic flow and road basic design information;
the road traffic accident data sheet collected by the data collection subsystem (2) comprises: the time, the place, the geographical position, the road section, the accident type, the number of dead people, the number of serious injury people, the number of light injury people, the direct economic loss and the accident investigation report of the road traffic accident.
3. The method according to claim 1 or 2, wherein the risk degree of one road comprises a ratio of the traffic safety risk of the one road to a socially tolerable safety risk;
wherein, the road traffic safety risk comprises the product of the probability of accident occurrence of the road traffic and the loss caused by the accident occurrence; the socially tolerable security risks of this road include: the product of the socially tolerable probability of an accident and the severity of the consequences of the accident.
4. The method according to claim 2, characterized in that the computing subsystem (4) comprises: the system comprises a unit road section annual accumulated million vehicle kilometer accident rate calculation module (401), a unit road section unit time period annual accumulated accident consequence calculation module (402), a unit road section unit time period accident index and related parameter calculation module (403), a unit road section unit time period annual accident consequence calculation module (404) and a unit road section annual million vehicle kilometer accident rate calculation module (405);
the computing subsystem (4) further comprises: a unit section unit time interval current accident risk calculation module (406) in the current year, a unit section unit time interval highest allowable accident risk calculation module (407) in the current year, and a unit section unit time interval current accident risk calculation module (408) in the current year;
the computing subsystem (4) further comprises: the system comprises a road section \ route \ road network current annual accident risk calculation module (409), a road section \ route \ road network highest allowable risk calculation module (410) and a road section \ route \ road network current annual accident risk calculation module (411).
5. The method as claimed in claim 4, wherein R is calculated in the calculation module (411) for the current accident risk degree of the road section/route/road network in the current yearrΔWΔtAggregating according to road sections, and obtaining the road safety accident risk degree distribution of the road sections, the road lines and the road network in the time period, wherein:
RrΔtfor assessing the current annual risk of accidents of road sections, routes or road networks during the time interval delta t, RrΔWΔtW is the total road mileage of an evaluation road section, a route or a road network for evaluating the current accident risk degree of the unit road section divided in the evaluation road section in the current year;
ΔW＝Wend-Wstartfor evaluating the road length of divided unit sections in a section, WstartAnd WendAt the start and end points,. DELTA.t ═ tend-tstartTime periods, t, derived for evaluating start and end timesstartAnd tendStart time and end time.
6. The method according to claim 4, characterized in that the unit road segment unit time segment present year current accident risk is calculated in a unit road segment unit time segment present year current accident risk calculation module (408), wherein,
RΔWΔtfor evaluating unit road section unit time interval divided in road section, current yearRisk of accident, RpΔWΔtThe highest allowable accident risk in the current year is evaluated in the unit road section unit time period divided in the road section.
7. The method according to claim 4, characterized in that the unit road segment unit time segment present year present accident risk is calculated in a unit road segment unit time segment present year present accident risk calculation module (406), wherein,
RΔWΔt＝PΔW×LΔWΔt，PΔWaccumulating million kilometers accident rate L for the current year of unit road sections divided in the evaluation road sectionΔWΔtAnd accumulating accident consequences for the current year of unit section unit time periods divided in the evaluation section.
8. The method according to claim 5, wherein the cumulative million car kilometers accident rate of the unit road section in the current year is calculated in a cumulative million car kilometers accident rate calculation module (401), wherein:
in a unit section unit time period current year accumulated accident consequence calculation module (402), calculating a unit section unit time period current year accumulated accident consequence, wherein:
the total number of accidents occurring in unit section unit time interval in the current year is obtained by calculating the accident record of the accident occurrence time in the current year in the road traffic accident data table;
9. The method according to claim 4, characterized in that in the unit road section unit time period highest allowable accident risk calculation module (407) the unit road section unit time period highest allowable accident risk in the year is calculated, wherein RpΔWΔt＝PpΔW×LpΔWΔt，PpΔWIs a traffic accident rate index, L, of the unit road section in the yearpΔWΔt＝LlΔWΔtX (1-setting million vehicles per kilometer accident descent rate in the same year) is the highest allowable accident consequence loss in the unit time interval of the unit road section in the current year, LlΔWΔtThe annual accident consequence loss over the unit time period of the unit section.
10. The method according to claim 8, characterized by calculating the annual accident consequence on a unit segment unit time period in an annual accident consequence calculation module (404) on a unit segment unit time period, wherein:
and calculating the accident records in the road traffic accident data table, wherein the accident occurrence time of the last year is the unit time period of the unit road section, and the accident records are obtained during the unit time period of each day.
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