A method for planning hazardous chemicals transportation roads

Abstract

The invention relates to the technical field of hazardous chemical transportation, and specifically discloses a method for planning hazardous chemical transportation roads. An electronic map is constructed based on hazardous chemical transportation road scene information, an initial position and a terminal position of a hazardous chemical transportation vehicle are located in the constructed electronic map, and a plurality of transportation routes of the hazardous chemical transportation vehicles are obtained; pavement data and road boundary data of each of the transportation routes are collected to obtain a pavement characterization value of the transportation route and a road boundary behavior value of the transportation route, and a path selection value of the transportation route is obtained based on the pavement characterization value and the road boundary behavior value, and the plurality of transportation routes are classified into a first-class transportation route, a second-class transportation route and a third-class transportation route. The invention completes the planning of the transportation route by considering the route habits of other hazardous chemical transportation vehicle drivers, the time deviation of the transportation route and the degree of familiarity of the hazardous chemical transportation vehicle drivers themselves, and has high accuracy and strong reliability.

Description

Technical Field

[0001] The present invention relates to the technical field of hazardous chemical transportation, and in particular to a method for planning a hazardous chemical transportation road. Background Art

[0002] Due to the special properties of hazardous chemicals, once a transportation accident occurs, it will cause huge losses in life safety, property and environment.

[0003] Risk analysis and safe road selection for hazardous chemicals transportation are important measures to reduce hazardous chemicals transportation accidents. Therefore, studying hazardous chemicals transportation road planning methods is of great significance to reducing hazardous chemicals transportation accidents.

[0004] For example, patent application publication number CN111967644A discloses a method for planning hazardous chemical transportation roads, including: step 1, establishing a hazardous chemical road transportation risk index model; step 2, determining the index weights using the analytic hierarchy process, determining the weights of the hazardous chemical road transportation risk index model using the analytic hierarchy process, and using the 1-9 scaling method to compare and scale the indicators at each level to form a judgment matrix, and solving the weight value of each indicator when the consistency ratio of each matrix is ​​less than 0.1; step 3, obtaining the risk index information of each feasible section between the starting and ending points of the transportation direction; step 4, standardizing the index information of the transportation direction section; step 5, solving the weighted section length; step 6, using an intelligent algorithm to plan a weighted shortest path to obtain the optimal path.

[0005] In the above scheme, the hazardous chemicals transportation road planning is obtained by identifying the shortest path, which lacks consideration of the transportation road working environment and the probability of past road conditions, and has great limitations. Summary of the invention

[0006] The purpose of the present invention is to provide a method for planning hazardous chemical transportation roads, which processes the number of times each transportation route is selected by a hazardous chemical transportation vehicle and the time deviation values ​​of all hazardous chemical transportation vehicles on each transportation route during transportation within a time period to obtain the transportation number ratio of the transportation route and the deviation time ratio of the transportation route. Based on the transportation number ratio and the deviation time ratio of the transportation path and the familiarity of the hazardous chemical transportation vehicle driver with the transportation path, a selection standard value of the transportation path is obtained, and intelligent recommendations for similar transportation routes are completed in descending order of the selection standard values ​​to solve the above-mentioned background problems.

[0007] The purpose of the present invention can be achieved through the following technical solutions:

[0008] A method for planning a hazardous chemicals transportation road comprises the following steps:

[0009] An electronic map is constructed based on the hazardous chemicals transportation road scene information, and the initial position and the terminal position of the hazardous chemicals transportation vehicle are located in the constructed electronic map to obtain multiple transportation routes of the hazardous chemicals transportation vehicles;

[0010] The pavement data and the road boundary data of each of the transport paths are collected, and a pavement characterization value and a road boundary behavior value of the transport path are obtained, and a path selection value of the transport path is obtained based on the pavement characterization value and the road boundary behavior value;

[0011] Classifying the plurality of transport paths according to the path selection analysis values ​​of the transport paths, including a first-class transport path, a second-class transport path, and a third-class transport path;

[0012] Multiple transport routes in the same category are processed to obtain the transport number ratio and deviation time ratio of each transport route. Based on the transport number ratio and deviation time ratio, the selection standard value of the transport route is obtained, and the hazardous chemicals transportation road planning is completed according to the selection standard value.

[0013] As a further solution of the present invention: the road surface data includes road surface smoothness, damage condition and anti-skid capacity index of the transportation path;

[0014] The pavement smoothness, damage condition and anti-skid ability index of the transport path are weighted to obtain the pavement characterization value of the transport path.

[0015] As a further solution of the present invention: the road boundary data includes the population density of the transport buffer area, the restricted area ratio of the transport buffer area and the road safety behavior base number;

[0016] The population density of the transport buffer area is recorded as B1;

[0017] The restricted area ratio of the transport buffer area is denoted as B2;

[0018] By formula The road boundary behavior value Bi of the transportation path is calculated; among which, B3 is the road safety behavior base.

[0019] As a further solution of the present invention: the construction of the transport buffer area is:

[0020] Along the direction of the transport path, it expands to both sides of the transport path at a distance of 1 km to form a transport buffer area of ​​the transport path.

[0021] As a further solution of the present invention: the process of obtaining the restricted area ratio is:

[0022] The restricted area in the transport buffer area is marked, and the area of ​​the restricted area is obtained. The ratio of the area of ​​the restricted area to the area of ​​the transport buffer area is calculated to obtain the restricted area ratio.

[0023] As a further solution of the present invention: the process of obtaining the road safety behavior cardinality is:

[0024] Obtain the passenger flow, vehicle flow and number of road intersections on the transportation route;

[0025] Label the flow of people on the transport path as y1;

[0026] The traffic flow of the transport path is marked as y2;

[0027] Mark the road intersection of the transport path as y3;

[0028] By formula The road safety behavior base B3 is obtained, where Sg is the accident rate of the transportation route.

[0029] As a further solution of the present invention: the road surface characterization value of the transport path is recorded as Zi, and the road boundary behavior value of the transport path is recorded as Bi, and the formula is Calculate the path selection value ZB of the transportation path;

[0030] The first limit value of the preset path selection value is ZB1, and the second limit value of the preset path selection value is ZB2, wherein ZB1<ZB2;

[0031] When ZB<ZB1, the transport paths within this range are recorded as three types of transport paths;

[0032] When ZB1≤ZB<ZB2, the transport path within this range is recorded as a Class II transport path;

[0033] When ZB≥ZB2, the transportation paths within this range are recorded as first-class transportation paths.

[0034] As a further solution of the present invention: based on the classification of the transport paths, a preset time period is set, and the ratio of the selected transport times of each transport path to the total transport times of the same transport path is calculated to obtain the transport number ratio of the transport path, which is recorded as Ys;

[0035] The mean time deviation of each transport route is calculated by comparing it with the total time deviation of similar transport routes to obtain the deviation time ratio of the transport route, which is recorded as Yt.

[0036] That is, through the formula The selection standard value Yi of the transport route is calculated, where a1 and a2 are preset proportional coefficients, Yy is the theoretical number threshold of the number of times the driver of the hazardous chemicals transport vehicle drives the transport route, and Yz is the actual number of times the driver of the hazardous chemicals transport vehicle drives the transport route.

[0037] As a further solution of the present invention: the process of obtaining the mean time deviation of each transportation path is:

[0038] During the time period, obtain the time deviation value of all hazardous chemicals transport vehicles during transportation on each transportation route;

[0039] The time deviation value is recorded as Wi, i is the number of transportations of the hazardous chemicals transport vehicle, i=1, 2, ..., Wn;

[0040] Arrange the time deviation values ​​of each hazardous chemicals transport vehicle during each transport route to obtain a time deviation value group W1, W2, W3, ..., Wn;

[0041] According to the formula The standard deviation Wa of the time deviation value group is calculated, wherein Wp is the average value of the time deviation value group W1, W2, W3, ...., Wn;

[0042] If the standard deviation Wa of the time deviation value group is greater than or equal to the preset standard deviation value Wy, delete the maximum value and / or minimum value in the time deviation value group data, and calculate the standard deviation Wa of the time deviation value group data again. When Wa is less than the preset standard deviation value Wy, sum and average the remaining data in the time deviation value group to obtain the time deviation mean for each transport path.

[0043] As a further solution of the present invention: all transportation paths of the same type are sorted in descending order according to the selection criterion value, and the transportation path corresponding to the largest selection criterion value is recorded as the priority planning path.

[0044] Beneficial effects of the present invention:

[0045] (1) Based on the initial position and the terminal position of the hazardous chemicals transport vehicle, the present invention collects the pavement data and road boundary data of the obtained multiple transport paths, obtains the pavement quality of each transport path by processing the pavement data, that is, the pavement characterization value of the transport path, and obtains the road condition environment of each transport path by processing the road boundary data, that is, the road boundary behavior value of the transport path, that is, the transport path is identified by the pavement quality of the transport path and the road condition environment (population density, restricted area, road intersection) corresponding to the path, and completes the classification of multiple transport paths according to the path selection value of the transport path, thereby realizing the effective integration of the transport paths;

[0046] (2) The present invention is based on similar transport routes and a preset time period. Within the time period, the number of times each transport route is selected by hazardous chemicals transport vehicles and the time deviation values ​​of all hazardous chemicals transport vehicles on each transport route during the transport process are processed to obtain the transport number ratio of the transport route and the deviation time ratio of the transport route. Based on the transport number ratio and the deviation time ratio of the transport route and the familiarity of the hazardous chemicals transport vehicle driver with the transport route, a selection standard value for the transport route is obtained. According to the order of the selection standard value from large to small, intelligent recommendation of similar transport routes is completed. That is, the transport route is planned based on the route habits of other hazardous chemicals transport vehicle drivers, the time deviation of the transport route and the hazardous chemicals transport vehicle driver's own familiarity with the route, with high accuracy and strong reliability. BRIEF DESCRIPTION OF THE DRAWINGS

[0047] The present invention will be further described below in conjunction with the accompanying drawings.

[0048] Figure 1 This is a flow chart of a method for planning a hazardous chemicals transportation road according to an embodiment of the present invention;

[0049] Figure 2 It is a flow chart of transportation route classification in a hazardous chemicals transportation road planning method according to an embodiment of the present invention. DETAILED DESCRIPTION

[0050] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0051] Example 1

[0052] See also Figure 1 As shown, the present invention is a method for planning a hazardous chemicals transportation road, comprising the following steps:

[0053] An electronic map is constructed based on the hazardous chemicals transportation road scene information, and the initial position and the terminal position of the hazardous chemicals transportation vehicle are located in the constructed electronic map to obtain multiple transportation routes of the hazardous chemicals transportation vehicles;

[0054] The pavement data and the road boundary data of each of the transport paths are collected, and a pavement characterization value and a road boundary behavior value of the transport path are obtained, and a path selection value of the transport path is obtained based on the pavement characterization value and the road boundary behavior value;

[0055] Classifying the plurality of transport paths according to the path selection analysis values ​​of the transport paths, including a first-class transport path, a second-class transport path, and a third-class transport path;

[0056] Multiple transport routes in the same category are processed to obtain the transport number ratio and deviation time ratio of each transport route. Based on the transport number ratio and deviation time ratio, the selection standard value of the transport route is obtained, and the hazardous chemicals transportation road planning is completed according to the selection standard value.

[0057] Example 2

[0058] The potential safety hazard of hazardous chemicals transportation often starts with leakage, and road bumps are an important factor leading to leakage. During transportation, the bumps and vibrations of the vehicle can easily cause damage to the packaging. These damages may be concentrated in the barrel cover not being tightened or the sealing ring failing, the welds of the iron barrel and the barrel reinforcement being damaged due to friction, and the bottom of the barrel being displaced during driving. For hazardous chemicals such as gas cylinders, there may also be problems such as the cylinder valve not wearing a safety cap or not being tightened, causing it to fall off and fail, and the welds of the welded gas cylinder being damaged and leaking due to vibration and friction. Obtain road quality data and identify the bumpy state of the road, specifically:

[0059] An electronic map is constructed based on the hazardous chemicals transportation road scene information, and the initial position of the hazardous chemicals transportation vehicle is identified and located in the constructed electronic map to obtain the initial position information of the hazardous chemicals transportation vehicle in the electronic map;

[0060] Identify and locate the terminal position of the hazardous chemicals transport vehicle in the constructed electronic map, and obtain the terminal position information of the hazardous chemicals transport vehicle in the electronic map;

[0061] Based on the initial position information and the terminal position information of the hazardous chemical transport vehicle, multiple transport routes of the hazardous chemical transport vehicle are obtained in the electronic map;

[0062] The transportation route is obtained based on the path where the initial position information and the terminal position information actually exist.

[0063] Collecting road surface data of each of the transport routes, and obtaining a road surface characterization value of the transport route based on the road surface data;

[0064] Among them, the road surface data includes the road surface smoothness, damage condition and anti-skid capacity index of the transportation route;

[0065] The pavement smoothness, damage condition and anti-skid ability index of the transport path are weighted to obtain the pavement characterization value of the transport path.

[0066] Example:

[0067] The road surface flatness of the transport route is marked as Z1;

[0068] Mark the damage status of the transport path as Z2;

[0069] The anti-skid capacity index of the transport path is marked as Z3;

[0070] That is, the pavement characterization value Zi of the transport path is obtained through the formula Zi=Z1*d1+Z2*d2+Z3*d3, where d1, d2, and d3 represent the weight values ​​of the pavement flatness, damage condition, and anti-skid ability indicators, respectively, and d1+d2+d3=1.

[0071] Collecting the road boundary data of each of the transport paths, and obtaining the road boundary behavior value of the transport path based on the road loop data;

[0072] The road boundary data include the population density of the transport buffer area, the restricted area ratio of the transport buffer area and the road safety behavior base number. The population density of the transport buffer area, the restricted area ratio of the transport buffer area and the road safety behavior base number are processed to obtain the road boundary behavior value of the transport path.

[0073] Example:

[0074] Expand along the transport path at a distance of 1 km on both sides of the transport path to form a transport buffer area of ​​the transport path;

[0075] Get the population density of the transport buffer area and mark it as B1;

[0076] Obtain the restricted area ratio of the transport buffer area, and mark the restricted area ratio as B2;

[0077] Among them, the process of obtaining the restricted area ratio is:

[0078] Mark the restricted area in the transport buffer area, obtain the area of ​​the restricted area, and calculate the ratio of the area of ​​the restricted area to the area of ​​the transport buffer area to obtain the restricted area ratio;

[0079] Restricted areas include, but are not limited to, water source protection areas, nature reserves (national parks, scenic spots, world cultural and natural heritage sites, etc.) or urban centers (hospitals, schools, government agencies, etc.);

[0080] The area of ​​the restricted area is the area of ​​the restricted area falling within the transport buffer area;

[0081] By formula Calculate the road boundary behavior value Bi of the transportation path; where B3 is the road safety behavior base;

[0082] The process of obtaining the road safety behavior base is as follows:

[0083] Obtain the passenger flow, vehicle flow and number of road intersections on the transportation route;

[0084] Label the flow of people on the transport path as y1;

[0085] The traffic flow of the transport path is marked as y2;

[0086] Mark the road intersection of the transport path as y3;

[0087] By formula Obtain the road safety behavior base B3, where Sg is the accident rate of the transportation route;

[0088] Among them, the accident rate of the transportation route is the frequency of accidents occurring on the transportation route within a preset period, and the preset period is set by the staff based on experience.

[0089] The pavement characterization value Zi of the transport path and the road boundary behavior value Bi of the transport path are processed, that is, the formula The path selection value ZB of the transportation path is calculated, where: is the preset scale factor, Greater than 0;

[0090] in, The acquisition process is:

[0091] There are m groups of historical data, each group of historical data includes the pavement characterization value of the transportation path, the road boundary behavior value of the transportation path and the path selection value of the transportation path. The m groups of historical data are fitted using a linear model, and the prepared historical data are brought into the selected fitting model for fitting, and the mean value of the fitting coefficient is obtained as the preset proportional coefficient. .

[0092] From the above formula for obtaining the path selection value of the transportation path, we can know that:

[0093] The larger the pavement characterization value of the transport path obtained by weighted processing of the pavement flatness, damage condition and anti-skid ability index, the better the pavement quality of the selected transport path, and the larger the path selection value of the transport path obtained;

[0094] By constructing the transport buffer area of ​​the transport path, the road boundary behavior value of the transport path obtained by the population density of the transport buffer area, the restricted area ratio of the transport buffer area and the road safety behavior cardinality is smaller, which means that the driving interference factors and driving risks of the selected transport path are smaller, and the path selection analysis value of the obtained transport path is greater;

[0095] By obtaining the road boundary behavior value of the transportation path, we can know that:

[0096] The smaller the population density in the transport buffer area, the smaller the risk of personnel safety caused by leakage of hazardous chemicals in the transport buffer area, and the smaller the road boundary behavior value of the transport path.

[0097] The smaller the restricted area ratio of the transport buffer area, the smaller the environmental safety risk caused by the hazardous chemicals transport vehicle once a leak occurs in the transport buffer area, and the smaller the road boundary behavior value of the transport path is;

[0098] The fewer road intersections on the transport route, the smaller the probability of an accident occurring on the transport route for hazardous chemicals transport vehicles, and the smaller the road boundary behavior value of the transport route.

[0099] Example 3

[0100] Based on the path selection analysis value of the transportation path, the transportation paths of multiple hazardous chemicals transport vehicles are classified and processed;

[0101] See also Figure 2 , the first limit value of the preset path selection value is ZB1, and the second limit value of the preset path selection value is ZB2, wherein ZB1<ZB2;

[0102] The path analysis value ZB is compared with the first limit value ZB1 of the path analysis value and the second limit value ZB2 of the path analysis value:

[0103] When ZB<ZB1, the transport paths within this range are recorded as three types of transport paths;

[0104] When ZB1≤ZB<ZB2, the transport path within this range is recorded as a Class II transport path;

[0105] When ZB≥ZB2, the transport paths within this range are recorded as first-class transport paths;

[0106] When planning the transport routes for hazardous chemicals transport vehicles, the transport route planning (being selected) priority for Class I transport routes is higher than the transport route planning priority for Class II transport routes, and the transport route planning (being selected) priority for Class II transport routes is higher than the transport route planning priority for Class III transport routes.

[0107] In a specific embodiment, when the transportation route planning of one type of transportation path cannot be planned (due to factors such as traffic control or accidents), the transportation route planning of one type of transportation path is considered; when the transportation route planning of one type of transportation path cannot be planned, the transportation route planning of three types of transportation paths is considered.

[0108] Among them, the limit values ​​of path selection value ZB1 and ZB2 are empirical values, which are obtained based on experience:

[0109] In the actual obtaining process, there are many groups of pavement characterization values ​​of the transport path and road boundary behavior values ​​of the transport path. Many groups of pavement characterization values ​​of the transport path and road boundary behavior values ​​of the transport path are processed to obtain the path selection values ​​of the corresponding groups. The staff identifies the transport path status level according to so many groups of path selection values, thereby obtaining a corresponding relationship between a path selection value and the transport path status level, and then derives and divides the path selection value according to the transport path status of the path selection value, thereby obtaining the limit values ​​ZB1 and ZB2 of the path selection value. By comparing the limit values ​​of the path selection value, the identification of the transport path status level corresponding to the path selection value is completed.

[0110] Example 4

[0111] Based on the classification of the transport paths, since there are multiple transport paths in each type of transport path, how to find the optimal planning path among multiple transport paths of the same type, based on this, the present invention also includes the following steps:

[0112] Based on the same type of transport paths, this embodiment takes a type of transport path as an example;

[0113] A preset time period is used to obtain the number of times each transport route in a category of transport routes is selected by a hazardous chemicals transport vehicle within the time period;

[0114] The selected transportation times of each transportation route are calculated by comparing the total transportation times of the same transportation route to obtain the transportation number ratio of the transportation route;

[0115] The total number of transports within the same transport route is the sum of the number of transports selected by hazardous chemicals transport vehicles on each transport route within the same transport route;

[0116] The time period is set by the staff based on experience, including but not limited to 1 month, 3 months or 6 months.

[0117] During the time period, obtain the time deviation value of all hazardous chemicals transport vehicles during transportation on each transportation route;

[0118] The time deviation value is the difference between the estimated arrival time and the arrival time of each transportation process of the hazardous chemicals transport vehicle. The estimated arrival time is based on the satellite navigation time before departure. Satellite navigation includes but is not limited to Beidou satellite navigation and Amap navigation;

[0119] The time deviation value is recorded as Wi, i is the number of transportations of the hazardous chemicals transport vehicle, i=1, 2, ..., Wn;

[0120] Arrange the time deviation values ​​of each hazardous chemicals transport vehicle during each transport route to obtain a time deviation value group W1, W2, W3, ..., Wn;

[0121] According to the formula The standard deviation Wa of the time deviation value group is calculated, wherein Wp is the average value of the time deviation value group W1, W2, W3, ...., Wn;

[0122] If the standard deviation Wa of the time deviation value group is greater than or equal to the preset standard deviation value Wy, the maximum value and / or the minimum value in the time deviation value group data is deleted, and the standard deviation Wa of the time deviation value group data is calculated again. When Wa is less than the preset standard deviation value Wy, the remaining data in the time deviation value group are summed and averaged to obtain the time deviation mean of each transportation path;

[0123] The mean time deviation of each transport route is calculated by comparing it with the total time deviation of similar transport routes to obtain the deviation time ratio of the transport route.

[0124] Among them, the total time deviation within the same type of transportation path is the sum of the mean time deviation of each transportation path within the same type of transportation path.

[0125] The transport number ratio of the transport path is denoted as Ys;

[0126] The deviation time ratio of the transport path is recorded as Yt;

[0127] That is, through the formula The standard value Yi for selecting the transport route is calculated, where a1 and a2 are preset proportional coefficients, and a1 and a2 are both greater than 0. Yy is the theoretical number threshold of the number of times the driver of the hazardous chemicals transport vehicle drives the transport route, which is set by the staff based on experience. Yz is the actual number of times the driver of the hazardous chemicals transport vehicle drives the transport route.

[0128] It can be seen from the above formula for obtaining the selection standard value of the transport path that the greater the actual number of times the hazardous chemicals transport vehicle driver travels the transport path, the more familiar the hazardous chemicals transport vehicle driver is with the transport path, and the smaller the difference between the theoretical number threshold and the actual number, the greater the selection standard value of the transport path obtained;

[0129] The larger the transport number ratio of a transport path, the more times the transport path is selected by the drivers of hazardous chemicals transport vehicles among similar transport paths, and the larger the selection standard value of the transport path is.

[0130] The smaller the deviation time ratio of the transport path is, the less time is wasted in the transport process of the transport path among similar transport paths (that is, the fewer sudden factors of road conditions are), and the larger the selection standard value of the transport path is.

[0131] All transport paths of the same type are sorted in descending order according to the selection criterion value, the transport path corresponding to the largest selection criterion value is recorded as the priority planning path, and the remaining transport paths are recommended in descending order according to the selection criterion value.

[0132] The core of the present invention is: based on the initial position and the terminal position of the hazardous chemicals transport vehicle, the pavement data and road boundary data of the obtained multiple transport paths are collected, and the pavement quality of each transport path, that is, the pavement characterization value of the transport path, is obtained by processing the pavement data, and the road condition environment of each transport path, that is, the road boundary behavior value of the transport path, is obtained by processing the road boundary data, that is, the transport path is identified by the pavement quality of the transport path and the road condition environment corresponding to the path;

[0133] The core of the present invention lies in: based on similar transportation routes and a preset time period, the number of times each transportation route is selected by a hazardous chemical transport vehicle and the time deviation values ​​of all hazardous chemical transport vehicles on each transportation route during the transportation process are processed within the time period to obtain the transportation number ratio of the transportation route and the deviation time ratio of the transportation route. Based on the transportation number ratio and the deviation time ratio of the transportation route and the familiarity of the hazardous chemical transport vehicle driver with the transportation route, the selection standard value of the transportation route is obtained, and intelligent recommendation of similar transportation routes is completed according to the order of the selection standard value from large to small.

[0134] The above is a detailed description of an embodiment of the present invention, but the content is only a preferred embodiment of the present invention and cannot be considered to limit the scope of implementation of the present invention. All equivalent changes and improvements made within the scope of the present invention should still fall within the scope of the patent coverage of the present invention.

Claims

1. A method for planning a hazardous chemicals transportation road, characterized in that: The following steps are involved: An electronic map is constructed based on the hazardous chemicals transportation road scene information, and the initial position and the terminal position of the hazardous chemicals transportation vehicle are located in the constructed electronic map to obtain multiple transportation routes of the hazardous chemicals transportation vehicles; The pavement data and the road boundary data of each of the transport paths are collected, and a pavement characterization value and a road boundary behavior value of the transport path are obtained, and a path selection value of the transport path is obtained based on the pavement characterization value and the road boundary behavior value; Classifying the plurality of transport paths according to the path selection analysis values ​​of the transport paths, including a first-class transport path, a second-class transport path, and a third-class transport path; Process multiple transport routes in the same category to obtain the transport number ratio and deviation time ratio of each transport route, obtain the selection standard value of the transport route based on the transport number ratio and deviation time ratio, and complete the planning of hazardous chemicals transportation roads according to the selection standard value; Road boundary data include population density in the transport buffer area, restricted area ratio in the transport buffer area, and road safety behavior base; The population density of the transport buffer area is recorded as B1; The restricted area ratio of the transport buffer area is denoted as B2; By formula Calculate the road boundary behavior value Bi of the transportation path; where B3 is the road safety behavior base; The process of obtaining the Luan behavior base is as follows: Obtain the passenger flow, vehicle flow and number of road intersections on the transportation route; Label the flow of people on the transport path as y1; The traffic flow of the transport path is marked as y2; Mark the road intersection of the transport path as y3; By formula Obtain the road safety behavior base B3, where Sg is the accident rate of the transportation route; The pavement characterization value of the transport path is recorded as Zi, and the road boundary behavior value of the transport path is recorded as Bi. Calculate the path selection value ZB of the transportation path; The first limit value of the preset path selection value is ZB1, and the second limit value of the preset path selection value is ZB2, wherein ZB1<ZB2; When ZB<ZB1, the transport paths within this range are recorded as three types of transport paths; When ZB1≤ZB<ZB2, the transport path within this range is recorded as a Class II transport path; When ZB≥ZB2, the transport paths within this range are recorded as first-class transport paths; Based on the classification of transportation routes and the preset time period, the selected transportation times of each transportation route are calculated with the total transportation times of the same transportation route to obtain the transportation number ratio of the transportation route, which is recorded as Ys; The mean time deviation of each transport route is calculated by comparing it with the total time deviation of similar transport routes to obtain the deviation time ratio of the transport route, which is recorded as Yt. That is, through the formula The selection standard value Yi of the transport route is calculated, where a1 and a2 are preset proportional coefficients, Yy is the theoretical number threshold of the number of times the hazardous chemicals transport vehicle driver drives the transport route, and Yz is the actual number of times the hazardous chemicals transport vehicle driver drives the transport route.

2. A method for planning hazardous chemicals transportation roads according to claim 1, characterized in that: Pavement data include the pavement smoothness, damage condition and skid resistance index of the transport route; The pavement smoothness, damage condition and anti-skid ability index of the transport path are weighted to obtain the pavement characterization value of the transport path.

3. A method for planning hazardous chemicals transportation roads according to claim 1, characterized in that: The construction of the transport buffer area is: Along the direction of the transport path, it expands to both sides of the transport path at a distance of 1 km to form a transport buffer area of ​​the transport path.

4. A method for planning hazardous chemicals transportation roads according to claim 1, characterized in that: The process of obtaining the restricted area ratio is: The restricted area in the transport buffer area is marked, and the area of ​​the restricted area is obtained. The ratio of the area of ​​the restricted area to the area of ​​the transport buffer area is calculated to obtain the restricted area ratio.

5. A method for planning hazardous chemicals transportation roads according to claim 1, characterized in that: The process of obtaining the mean time deviation of each transportation path is as follows: During the time period, obtain the time deviation value of all hazardous chemicals transport vehicles during transportation on each transportation route; The time deviation value is recorded as Wi, i is the number of transportations of the hazardous chemicals transport vehicle, i=1, 2, ..., Wn; Arrange the time deviation values ​​of each hazardous chemicals transport vehicle on each transport route to obtain a time deviation value group W1, W2, W3, ..., Wn; According to the formula The standard deviation Wa of the time deviation value group is calculated, wherein Wp is the average value of the time deviation value group W1, W2, W3, ...., Wn; If the standard deviation Wa of the time deviation value group is greater than or equal to the preset standard deviation value Wy, delete the maximum value and / or minimum value in the time deviation value group data, and calculate the standard deviation Wa of the time deviation value group data again. When Wa is less than the preset standard deviation value Wy, sum and average the remaining data in the time deviation value group to obtain the time deviation mean for each transport path.

6. A method for planning hazardous chemicals transportation roads according to claim 1, characterized in that: All transportation paths of the same type are sorted in descending order according to the selection criterion value, and the transportation path corresponding to the largest selection criterion value is recorded as the priority planning path.

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