CN112529246A - Transportation path planning method - Google Patents
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Abstract
A method for planning the transportation route features that more than three routes with similar distance and time are chosen by map software, and the safety value SR of the road condition in three routes is calculatedRCRoad traffic value SRTPIBridge safety value SRBrgTunnel safety value SRTunSlope safety value SRSlpAs 5 factors influencing the safety of path passage, the method is characterized in that: and giving weights to the 5 factors, then obtaining a safety index value RSI of each path in a comprehensive mode, and selecting the path according to the safety index value RSI. The route selection process utilizes related highway maintenance and periodic inspection data and road traffic condition informationThe safety evaluation results of the information and highway projects quantitatively evaluate the influence of road conditions, traffic volume, bridges, tunnels, slopes and other structures on the traffic safety of the road, and a safer and more reliable transportation path is provided.
Description
Technical Field
The invention relates to a transportation path planning method.
Background
With the rapid development of the transportation industry in China, the construction of roads and railways crosses mountains and valleys, and a large number of bridges, tunnels and slope projects are generated. In the transportation process of the vehicle, the road condition and the traffic volume of each path are different, and the types of the passing bridges, tunnels and side slopes are different, so that the risk degree brought to the safe passing of the vehicle is different, for example, the lower the evaluation grade of the technical conditions of the passing bridges, tunnels and side slopes of the path is, the worse the road condition of the path is, the larger the traffic volume is, and the larger the risk is. The existing internet intelligent map can only provide the distance of the route and the approximate congestion time, and for example, the optimal route can be obtained more accurately and reliably by considering the safety risk degree of the route passing.
Disclosure of Invention
In order to solve the technical problems, the path planning method provided by the invention starts from the aspects of the road conditions of the paths (including the road surface damage condition and the planar and longitudinal section linear design of the paths), the traffic volume, the safety risk of bridges, tunnels and side slopes, comprehensively calculates the path traffic safety index, and selects a relatively safe traffic path by combining with the real-time meteorological conditions to ensure the transportation safety.
The invention is realized by the following technical scheme.
The invention provides a transportation path planning method, which selects more than three paths with similar distance and time and carries out the safety value SR of the road condition in the three pathsRCRoad traffic value SRTPIBridge safety value SRBrgTunnel safety value SRTunSlope safety value SRSlpAnd as 5 factors influencing the path traffic safety, giving weights to the 5 factors, then comprehensively obtaining the safety index value RSI of each path, and selecting the path according to the safety index value RSI.
The safety index calculation method of each path comprises the following steps:
RSI＝SRRCgω1+SRTPIgω2+SRBrggω3+SRTungω4+SRSlpgω5；
ω1、ω2、ω3、ω4、ω5respectively is a road condition safety value SRRCRoad traffic value SRTPIBridge safety value SRBrgTunnel safety value SRTunSlope safety value SRSlpAnd (4) corresponding weight values.
The omega1、ω2、ω3、ω4、ω5Values are respectively omega1＝0.45，ω2＝0.1，ω3＝0.2， ω4＝0.15，ω5＝0.1。
The safety index value RSI needs at least one path larger than 80, and if the safety index value RSI is smaller than 80, the paths are planned again.
The safety value SR of the road conditionRCCalculating according to the road surface damage condition index PCI and the route linear safety value ASI of the path:
SRRC＝PCIgω’1+ASIgω”1；
ω’1＝0.3，ω”10.7; respectively corresponding weights of a damage condition index PCI and a route linear safety value ASI;
the route alignment safety value ASI gives a point depending on the linear incongruity and the sight distance shortage existing on the path.
The full score of the route linear safety value ASI is 100 minutes, linear incongruity positions existing on a path comprise a steep slope and a sharp bend, and 3 minutes are deducted from each position.
The road traffic value SRTPIDividing a path into n road sections, scoring the traffic condition TPI of each road section, and scoring 100, 90, 80, 70 and 60 according to the congestion condition;
traffic value SR over the entire routeTPI:
The bridge safety value SRBrgIs a bridge Total technology status safety score SR'BrgAnd bridge safety evaluation score SR'B'rgWeighted sum after:
SRBrg＝ω'3gSR'Brg+ω”3gSR”Brg；
bridge overall technology status safety score SR'BrgThe score is divided into 1, 2, 3, 4 and 5 according to the state, the scores of 1 and 2 are 100, the score of 3 is 80, the score of 4 is 40, and the score of 5 is 0;
bridge safety evaluation score SR'BrgAnd scoring according to the bridge evaluation index.
The tunnel safety value SRTunIs a tunnel total technology status safety score SR'TunWith the evaluation score SR of tunnel security'TunWeighted sum after:
SRTun＝ω'4gSR'Tun+ω”4gSR”Tun；
the evaluation grades of the overall technical conditions of the tunnel are 1, 2, 3, 4 and 5, the scores of the 1 class and the 2 class are 100, the score of the 3 class is 80, the score of the 4 class is 40, and the score of the 5 class is 0;
tunnel safety evaluation score SR'TunAnd scoring according to the tunnel evaluation index.
The side slope safety value SRSlpThe technical conditions of the side slope are graded and sequentially graded into 100, 80, 60, 40 and 0.
The invention has the beneficial effects that: the influence of road conditions, traffic volume, bridges, tunnels, slopes and other structures on the path traffic safety is quantitatively evaluated by using related road maintenance and periodic inspection data, road traffic condition information and safety evaluation results of road projects, and a safer and more reliable transportation path is provided for transportation.
Detailed Description
The technical solutions of the present invention are further described below, but the scope of the claims is not limited thereto.
A transportation route planning method based on route traffic safety indexes comprises the steps of selecting more than 3 alternative routes with similar transportation distances and congestion times by using map auxiliary software, taking main structures on the routes such as road conditions, road traffic volume, bridges, tunnels, slopes and the like of the routes as 5 main factors influencing route traffic safety, calculating influence values of each influence factor on the route traffic safety in a quantitative evaluation mode, giving a proper weight to each factor, comprehensively calculating the traffic safety indexes of the alternative routes, and finally selecting the route with the highest traffic safety index and proper meteorological conditions as an optimal route by combining real-time meteorological information.
Specifically, in the transportation path planning method based on the path passing safety index, the path passing safety index may be calculated according to the following formula:
RSI＝SRRCgω1+SRTPIgω2+SRBrggω3+SRTungω4+SRSlpgω5
the symbols in the formula represent the following meanings:
RSI — path traffic safety index;
SRRCthe influence score of the road condition of the path on the RSI is abbreviated as a road condition safety score;
SRTPIthe influence score of the traffic volume of the route on the RSI is abbreviated as traffic volume safety score;
SRBrgthe influence score of the bridge on the path on the RSI is abbreviated as a bridge safety score;
SRTunthe influence score of the tunnel on the path on the RSI is abbreviated as a tunnel safety score;
SRSlpthe influence score of the slope on the path on the RSI is abbreviated as a slope safety score;
ω1、ω2、ω3、ω4、ω5are respectively SRRC、SRTPI、SRBrg、SRTunAnd SRSlpAnd (3) the values of the corresponding weights are as follows: omega1＝0.45，ω2＝0.1，ω3＝0.2，ω4＝0.15， ω5＝0.1。
In the transportation path planning method based on the path passing safety index, the influence score SR of 5 influence factors such as road conditions, road traffic volume, bridges, tunnels, slopes and the like on RSIRC， SRTPI，SRBri，SRTun、SRSlpAll values are [0,100]]Determined as follows in methods A, B, C, D, E, respectively:
A. according to the conventional matters of technical evaluation of the road condition of the road passing by the path and safety evaluation of road items, the pavement damage condition index PCI and the road line shape design evaluation result of the whole path are selected as indexes for evaluating the road condition safety.
And A1, the PCI value interval is [0,100], the larger the PCI value is, the more slight the road surface damage condition of the representative path is, and the safer the vehicle passes through the path. The long-distance route usually spans different road technical condition evaluation routes, and the road surface damage condition indexes of all the evaluation routes contained in the route are weighted and averaged according to the length of each route, so that the road surface damage condition index PCI of the whole route can be obtained, namely:
wherein n is the total number of evaluation routes contained in the path; PCIiCalculating the road surface damage condition index of each evaluation unit of each route according to 7.4.5 sections in the specification of road technical condition evaluation Standard JTG 5210 and 2018 for the road surface damage condition index of the ith evaluation route, wherein the road surface damage condition index of the route is the arithmetic mean value of the road surface damage condition indexes of all the evaluation units contained in the route; l isiThe length of the route is assessed for the ith.
A2. According to the highway project safety evaluation specification JTG B05-2015, the evaluation of the alignment of the route is mainly performed from the aspects of the smoothness and coordination of the alignment, the smoothness of the cross section transition and the plane and vertical section visual distances. In the transportation path planning method based on the path passing safety index, the calculation mode of the influence score (abbreviated as the route linear safety score ASI) of the route linear on the path passing safety index is as follows: referring to the conventional matters for evaluating the safety of the road on which the path passes in the traffic stage, a line shape evaluation result is called, and if the path has sections with inconsistent line shapes (such as steep slopes and sharp bends) or insufficient sight distance, and every section has one position, the line shape safety score ASI is deducted from 3 points, and the full ASI is 100 points. When the linear incongruity or the sight distance insufficient road section in the path exceeds 20, the ASI directly takes 0.
In summary, the road condition safety score SRRC＝PCIgω’1+ASIgω”1Wherein the PCI and ASI are calculated in the manners of A1, A2, omega'1＝0.3，ω”1＝0.7。
B. The traffic congestion index TPI of the road obtained from the conventional traffic operation condition evaluation event is selected as an index for evaluating the traffic safety of the road by referring to the conventional traffic operation condition evaluation event of the road network where the road is located. The TPI of the road network is calculated according to the content of section 8.2.1 in GB/T29107-2012 Specification of traffic condition description of road traffic information service, the value interval of the TPI is [0,10], and the smaller the value of the TPI, the smaller the traffic volume of the road network is, the safer the vehicle is in passing. When the influence of TPI on the path traffic safety is quantitatively evaluated, a percentile score is adopted, and the evaluation rule is as described in B1:
B1. when TPI is more than or equal to 0 and less than 2, the road network is in a smooth state, and the score is 100; when TPI is more than or equal to 2 and less than 4, the road network is in a basically smooth state, 10 points are deducted on the basis of 100 points, and the score is 90; when TPI is more than or equal to 4 and less than 6, the road network is in a light congestion state, and 20 points are deducted on the basis of 100 points, and the score is 80; when TPI is more than or equal to 6 and less than 8, the road network is in a moderate congestion state, 30 points are deducted on the basis of 100 points, and the score is 70; when TPI is more than or equal to 8 and less than or equal to 10, the road network is in a serious congestion state, 40 points are deducted on the basis of 100 points, and the score is 60.
When a path crosses a plurality of road networks, the path is divided into a plurality of sections according to different crossed road networks, the path is divided into n sections according to the road networks, and the road traffic congestion index of the ith section is TPIiA path length of LiThen the TPI of the entire path is calculated as:
that is, the road traffic congestion index of the entire route is equal to the road traffic indexes of all the sections by eachWeighted average of the segment lengths. After obtaining the TPI value of the whole route, the traffic safety score SR of the route is determined according to the rule B1TPI。
C. In the transportation path planning method based on the path traffic safety index, the influence of the bridge on the path on the traffic safety is evaluated through the evaluation grade of the overall technical condition of the bridge and the safety evaluation result of the bridge, and the influence score SR of the bridge on the path traffic safety is determinedBrg. Further, SR of single-seat bridgeBrgThe sum of the bridge overall technical condition safety score and the bridge safety evaluation score after weighting is respectively, namely:
SRBrg＝ω'3gSR'Brg+ω”3gSR”Brg
weight ω'3Take 0.7, weight ω "3Taking 0.3, SR'BrgFor the safety score of the bridge general technical situation, SR "BrgAnd (4) scoring the bridge safety evaluation. SR'Brg，SR”BrgThe calculation of (A) is carried out by adopting a percentage system, and the determination method is as described in C1 and C2:
C1. according to the technical condition evaluation Standard of road bridges JTG/T H21-2011, the evaluation grades of the overall technical condition of the bridge are divided into 1, 2, 3, 4 and 5, wherein the use functions of the bridge of the 1 and 2 types are completely normal, and the safety score SR 'of the overall technical condition of the bridge is'Brg100; type 3 bridge can still maintain normal use function, and SR 'is taken'Brg80; taking SR 'if the service function of the class 4 bridge is seriously influenced and the normal use cannot be ensured'Brg40; taking SR 'when the 5-type bridge is in a dangerous state'BrgAt the same time, the traffic safety index RSI of a route containing a class 5 bridge is set to 0, i.e. a route in which a class 5 bridge is present is not proposed at all as a transport route.
C2. According to the highway project safety evaluation specification JTG B05-2015, the safety evaluation of the bridge in the handover stage mainly aims at the following 5 indexes:
(1) the mark, the marking line and the speed control facility are related to the sharp-bent section of the bridge head;
(2) the bridge guardrail and the roadbed guardrail are connected with a transition section;
(3) influence of the bridge on the road sight distance;
(4) whether the bridge abutment in the roadside clean area is protected or not;
(5) crosswind related signs and speed control facilities.
The evaluation results of the above 5 indexes were used as a bridge safety evaluation score SR "BrgThe specific scoring mode is as follows: in the above 5 indexes, SR' is obtained if the evaluation result of each index satisfies the safety evaluation requirement "BrgTaking the full score of 100; if each item does not meet the safety evaluation requirement, 10 points or 20 points are deducted according to the degree of the non-meeting requirement, specifically: if one of the two basically meets the safety evaluation requirement, 10 points are deducted; if the safety evaluation requirement is not met, deducting 20 points; if one item is not involved, the item is not deducted (e.g., in areas where crosswind effects are negligible, crosswind-related signs and equipment are not involved).
Scoring all bridges on the path according to the method, and finally taking the average value of the safety scores of all bridges as the traffic safety influence score SR of the bridge on the pathBrg。
D. In the transportation path planning method based on the path passing safety index, the influence of the tunnel on the path on the passing safety is evaluated through the tunnel overall technical condition evaluation grade and the safety evaluation result of the tunnel, and the influence score SR of the tunnel on the path passing safety is determinedTun. Further, SR of single seat tunnelTunThe sum of the tunnel total technical condition safety score and the tunnel safety evaluation score after weighting is respectively, namely:
SRTun＝ω’4gSR’Tun+ω”4gSR”Tun
weight ω'4Take 0.7, weight ω "4Taking 0.3, SR'TunFor a tunnel overall technical status safety score, SR "TunAnd (4) evaluating the score for the tunnel safety. SR'Tun，SR”TunThe calculation of (A) is carried out by adopting a percentile system, and the determination method is as described in D1, D2:
D1. according to HighwayTunnel maintenance technology JTG H12-2015, the evaluation grades of the tunnel total technical condition are divided into 1, 2, 3, 4 and 5, wherein the 1 and 2 have no influence on traffic safety, and the safety score SR 'of the tunnel total technical condition'Tun100; type 3 tunnel may affect driving safety, get SR'Tun80; taking SR 'from the type 4 tunnel with serious damage and affecting driving safety'Tun40; taking SR 'from the type 5 tunnel with serious damage and traffic safety endangered'TunAt the same time, let the traffic safety index RSI of the route including the tunnel of type 5 be 0, i.e. the route in which the tunnel of type 5 exists is not proposed at all as a transport route.
D2. According to the highway project safety evaluation specification JTG B05-2015, the safety evaluation of the tunnel in the handover phase mainly aims at the following 6 indexes:
(1) the linear continuity and the sight distance of the tunnel portal section;
(2) an antiskid transition section of a tunnel entrance and exit road surface;
(3) a connecting transition section of the tunnel portal access way end and the tunnel outer guard bar;
(4) actual lighting effect of the tunnel and glare at the opening;
(5) the setting conditions of tunnel monitoring, ventilation, fire fighting and other facilities;
(6) the safety facilities for protecting pedestrians and non-motor vehicles in the tunnel where pedestrians and vehicles travel in a mixed mode.
The evaluation results of the above 6 indexes were regarded as a tunnel security evaluation score SR "TunThe specific scoring mode is as follows: according to the degree that the indexes meet the safety evaluation requirement, obtaining the safety condition value CI of each evaluation index, wherein the value of the safety condition value CI is 0,1 or 2 (the safety value of the index item which is not involved is 2), and respectively representing that the safety evaluation requirement is completely met, the safety evaluation requirement is basically met and the evaluation requirement is not met, then SR'TunCan be calculated as follows:
CI in the formulaiIs the safety condition value of the i-th evaluation index.
Scoring all tunnels on the path according to the method, and finally taking the average value of the safety scores of all tunnels as the passing safety influence score SR of the tunnel on the pathTun。
E. According to the highway subgrade maintenance technical specification JTG 5150-2020, the technical condition of the side slope is evaluated to obtain a side slope technical condition index SSCI, and the side slope technical condition is divided into five grades of excellent, good, medium, secondary and poor according to the difference of the value areas to which the SSCI belongs. In the transportation path planning method based on the path passing safety index, the influence score SR of the slope on the path passing safety index is calculated according to the following rule E1Slp：
E1. If the grade of the technical condition of the side slope is excellent, the safety score SR of the technical condition of the side slope is obtainedSlpTaking the full score of 100; if the grade of the technical condition of the side slope is good, the SR is takenSlp80; if the grade of the slope technical condition is middle, the SR is takenSlp60; if the grade of the technical condition of the side slope is inferior, the SR is selectedSlp40; if the grade of the technical condition of the side slope is poor, the SR is selectedSlpAt the same time, the route passing safety index RSI including such a slope is made 0, that is, when a slope with a poor technical condition level is included on the route, the route is not recommended as a transportation route.
After the safety score of each side slope is obtained according to E1, the average value of the safety scores of all the side slopes on the path is taken as the passing safety influence score SR of the side slope on the pathSlp。
The road condition safety score SR of each alternative path is respectively calculated through the A, B, C, D, E stepsRCTraffic safety score SRTPIBridge safety score SRBrgTunnel safety score SRTunAnd a slope safety score SRSlpAnd further calculating the traffic safety index RSI of each path. If the RSI is larger than or equal to 90, the passing safety level of the path is determined to be optimal; if the RSI is more than or equal to 80 and less than 90, the passing safety level of the path is good; if the RSI is more than or equal to 60 and less than 80, the traffic safety level of the path is middle; if RSI is less than 60, the passage of the path is safeThe grade is poor. If all the alternative paths have the RSI less than 80, in view of transportation safety, other paths are re-selected as alternative paths, and the steps are repeated to calculate the RSI of each path until the passing safety level of the path is excellent or good.
And finally, acquiring real-time weather information of the region where the alternative path passes in the transportation period from the weather platform, and selecting the path with the maximum RSI (and the safe traffic level is at least good) and the proper weather condition in the transportation period as the optimal path. If the weather conditions of the region where the route with the optimal RSI value passes are not suitable in the transportation period, the route with the next RSI but the suitable weather conditions of the region can be selected as the optimal route on the premise that the RSI is larger than or equal to 80; if the weather conditions of the regions where all the alternative routes pass are not suitable for transportation in the transportation period, other dates are recommended to be selected for transportation or other routes are selected and the RSI value of the new route and the weather conditions of the regions where the new routes pass are reevaluated.
Unsuitable meteorological conditions include, but are not limited to: freezing weather, windy weather with wind power above eight levels (wind speed of 62-74 km/h), snow weather with the snowfall amount larger than 4.9mm/d or rain weather with the rainfall amount larger than 8.1 mm/h.
The path planning system comprises the following modules: the map navigation module, the RSI calculation module and the meteorological information reference module. The map navigation module provides an alternative route by using the navigation service of map auxiliary software; the RSI calculation module calculates the influence scores of all factors by using the input road maintenance and periodic inspection data, road traffic condition information and the safety evaluation results of road projects, calculates a route passing safety index RSI by combining the influence weights of all factors and gives a route passing safety level; and the weather information reference module gives a conclusion on whether the alternative path has proper weather conditions to pass or not according to the real-time weather information of the region where the alternative path passes in the transportation period.
Firstly, auxiliary software such as a high-grade map and a Baidu map is used for selecting 3 or more alternative paths with similar transport distance and congestion time in a map navigation module.
Next, the traffic safety index of each alternative path is calculated in the RSI calculation module, and the method steps are as described in step A, B, C, D, E, F.
A. Calculating the road condition safety score SR by using the input road maintenance and periodic inspection data and the safety evaluation result of the road project communication stageRC。
The step A comprises the following two steps:
A1. calculating a road damage condition index PCI of the path according to the input road maintenance and periodic inspection data:
wherein n is the number of road technical condition evaluation routes included in the route, PCIiRoad damage status index for the ith route (from road maintenance and periodic inspection data), LiIs the length of the ith route.
A2. According to the project safety evaluation result of the road where the input path passes, calculating a route linear safety score ASI, wherein the calculation mode of the ASI is as follows: if the route has the line-shaped uncoordinated road sections (such as steep slopes and sharp bends) or the sight distance is insufficient, the line-shaped safety score ASI of the route is deducted by 3 points, the full ASI is 100 points, and when the line-shaped uncoordinated road sections or the sight distance is insufficient in the route exceeds 20 points, the ASI directly takes 0.
After the steps A1 and A2, the road condition safety score SR can be calculatedRC：
SRRC＝PCIgω’1+ASIgω”1
Wherein, omega'1Taking 0.3, omega "1Take 0.7.
B. Calculating the safety score SR of the traffic volume of the route according to the input traffic condition information data of the road where the route passesTPI。SRTPIDetermining according to the road traffic congestion index TPI, and when the path is divided into n sections according to different road networks, calculating the TPI of the whole path by adopting the following formula:
in the formula, TPIiRoad traffic congestion index, L, for the i-th zoneiIs the length of the ith segment. After obtaining the TPI of the entire path, SR is calculated according to the following rule B1TPI：
B1. When TPI is more than or equal to 0 and less than 2, SRTPITaking 100; when TPI is more than or equal to 2 and less than 4, SRTPITaking 90; when TPI is more than or equal to 4 and less than 6, SRTPITaking 80; when TPI is more than or equal to 6 and less than 8, SRTPITaking 70; when TPI is more than or equal to 8 and less than or equal to 10, SRTPIAnd taking 60.
C. Calculating a bridge safety score SR according to bridge regular inspection data in the input highway maintenance and regular inspection data and a bridge safety evaluation result in the safety evaluation results of the road project delivery stageBrg。
Step C again comprises the following two steps:
C1. calculating the total technical condition safety score SR 'of each bridge according to the input bridge scheduled inspection data'Brg: SR 'when the bridge total technical condition grade is type 1 or type 2'BrgTaking 100; SR 'when the bridge overall technical condition grade is 3 types'BrgTaking 80; SR 'when the bridge general technical status grade is 4 types'BrgTaking 40; SR 'when the bridge overall technical condition grade is 5 types'BrgTake 0 and make the traffic safety index RSI of the path containing 5 type bridges 0.
C2. Calculating a bridge safety evaluation score SR' according to the input bridge safety evaluation result "Brg，SR”BrgThe calculation is carried out in the following way:
the following 5 indexes in the bridge safety evaluation result are checked in sequence:
(1) the mark, the marking line and the speed control facility are related to the sharp-bent section of the bridge head;
(2) the bridge guardrail and the roadbed guardrail are connected with a transition section;
(3) influence of the bridge on the road sight distance;
(4) whether the bridge abutment in the roadside clean area is protected or not;
(5) crosswind related signs and speed control facilities.
SR' if the evaluation result of each item meets the safety evaluation requirement "BrgTaking the full score of 100; if each item does not meet the safety evaluation requirement, deducting 10 points or 20 points according to the degree of the non-meeting requirement, namely, deducting 10 points if one item basically meets the safety evaluation requirement; if the safety evaluation requirement is not met, deducting 20 points; if one item is not involved, the item is not deducted.
After the steps C1 and C2, the safety score SR of each bridge on the path can be calculatedBrg：
SRBrg＝ω'3gSR'Brg+ω”3gSR”Brg
In formula (II), omega'3Taking 0.3, omega "3Take 0.7.
After the safety score of each bridge is obtained, the average value of the safety scores of all bridges on the path is taken as the traffic safety influence score SR of the bridge on the pathBrg。
D. According to tunnel regular inspection data in the input road maintenance and regular inspection data and tunnel safety evaluation results in the safety evaluation results of the road project delivery stage, calculating a tunnel safety score SRTun。
Step D again comprises the following two steps:
D1. calculating the total technical condition safety score SR 'of each tunnel according to the input tunnel regular inspection data'Tun: SR 'when the tunnel total technical status grade is type 1 or type 2'TunTaking 100; SR 'when the tunnel total technical status grade is 3 types'TunTaking 80; SR 'when the tunnel total technical status grade is 4 types'TunTaking 40; SR 'when the tunnel total technical condition grade is 5 types'TunAnd taking 0, and simultaneously setting the traffic safety index RSI of the path containing the 5-type tunnel to be 0.
D2. Calculating a tunnel security evaluation score SR' from an input tunnel security evaluation result "Tun，SR”TunThe calculation is carried out in the following way:
and sequentially checking the following 6 indexes in the tunnel safety evaluation result:
(1) the linear continuity and the sight distance of the tunnel portal section;
(2) an antiskid transition section of a tunnel entrance and exit road surface;
(3) a connecting transition section of the tunnel portal access way end and the tunnel outer guard bar;
(4) actual lighting effect of the tunnel and glare at the opening;
(5) the setting conditions of tunnel monitoring, ventilation, fire fighting and other facilities;
(6) the safety facilities for protecting pedestrians and non-motor vehicles in the tunnel where pedestrians and vehicles travel in a mixed mode.
According to the degree that the indexes meet the safety evaluation requirement, obtaining the safety condition value CI of each evaluation index, wherein the value of the safety condition value CI is 0,1 or 2 (the safety value of the index item which is not involved is 2), and respectively representing that the safety evaluation requirement is completely met, the safety evaluation requirement is basically met and the evaluation requirement is not met, then SR'TunCalculated as follows:
in the formula, CIiIs the safety condition value of the i-th evaluation index.
After the steps D1 and D2, the safety score SR of each tunnel on the path can be calculatedTun：
SRTun＝ω’4gSR’Tun+ω”4gSR”Tun
In formula (II), omega'4Taking 0.3, omega "4Take 0.7.
After the safety score of each tunnel is obtained, the average value of the safety scores of all tunnels on the path is taken as the traffic safety influence score SR of the tunnel on the pathTun。
E. Calculating a slope safety score SR according to slope technical condition grade evaluation data in the input road maintenance and periodic inspection dataSlp，SRSlpIs calculated as described in rule E1:
E1. according to the input slope technical condition grade evaluation data, if the slope technical condition grade is excellent, then SRSlpTaking the full score of 100; SR if the grade of the technical status of the side slope is goodSlp80; if the grade of the technical condition of the side slope is middle, then SRSlp60; if the grade of the technical condition of the side slope is inferior, the SR is selectedSlp40; if the grade of the technical condition of the side slope is poor, the SR is selectedSlpLet the route passing safety index RSI including such a slope be 0 at the same time.
After the safety score of each side slope is obtained according to E1, the average value of the safety scores of all the side slopes on the path is taken as the passing safety influence score SR of the side slope on the pathSlp。
F. After the step A, B, C, D, E, obtaining the influence score of each influence factor on the path passing safety, and calculating the passing safety index of each alternative path according to the weight parameters of each input influence factor and the following formula:
RSI＝SRRCgω1+SRTPIgω2+SRBrggω3+SRTungω4+SRSlpgω5
in the formula, ω1、ω2、ω3、ω4、ω5Are respectively SRRC、SRTPI、SRBrg、SRTunAnd SRSlpThe corresponding weight values, each weight value parameter is: omega1＝0.45，ω2＝0.1，ω3＝0.2， ω4＝0.15，ω50.1. If there is a type 5 bridge, a type 5 tunnel, or a type 5 slope on the route, RSI is 0, and the route planning system does not suggest the route as a transportation route at all.
And F, obtaining the passing safety index RSI of each path. If the RSI is larger than or equal to 90, the path passing safety level output by the path planning system is excellent; if the RSI is more than or equal to 80 and less than 90, the passing safety level of the path is good; if the RSI is more than or equal to 60 and less than 80, the passing safety level of the path is middle; if the RSI is less than 60, the path passing safety level is poor.
If all the alternative paths are under good pass safety levels (RSI is less than 80), returning to the map navigation module, replanning the alternative paths, then in the RSI calculation module, repeating the A, B, C, D, E, F steps to calculate the RSI of each new path, and outputting the path pass safety levels until the path pass safety levels reach good or good (RSI is more than or equal to 80).
Finally, in a meteorological information reference module, selecting a path with the maximum RSI value and suitable meteorological conditions as an optimal path according to real-time meteorological information of the regions where all paths with the RSI larger than or equal to 80 pass in a transportation period, and outputting the optimal path; if the weather conditions of the area where the route with the optimal RSI passes are not suitable in the transportation period, selecting the route with the next RSI but suitable weather conditions as the optimal route, and outputting the optimal route; if the weather conditions of all the route passing areas are not suitable in the transportation period, the transportation period is changed, the optimal route is selected again, or the map navigation module is returned to plan the route again, the step A, B, C, D, E, F is repeated in the RSI calculation module to calculate the RSI value of the new route, and whether the weather conditions are suitable or not is evaluated in the weather information reference module.
Such inappropriate meteorological conditions include, but are not limited to: freezing weather, high wind weather with wind power above eight levels (wind speed of 62-74 km/h), snow weather with the snowfall amount larger than 4.9mm/d or rain weather with the rainfall amount larger than 8.1 mm/h.
Claims (10)
1. A method for planning the transportation route features that more than three routes with similar distance and time are chosen by map software, and the safety value SR of the road condition in three routes is calculatedRCRoad traffic value SRTPIBridge safety value SRBrgTunnel safety value SRTunSlope safety value SRSlpAs 5 factors influencing the safety of path passage, the method is characterized in that: and giving weights to the 5 factors, then obtaining a safety index value RSI of each path in a comprehensive mode, and selecting the path according to the safety index value RSI.
2. A transportation path planning method according to claim 1, characterized in that: the safety index calculation method of each path comprises the following steps:
RSI＝SRRCgω1+SRTPIgω2+SRBrggω3+SRTungω4+SRSlpgω5；
ω1、ω2、ω3、ω4、ω5respectively is a road condition safety value SRRCRoad traffic value SRTPIBridge safety value SRBrgTunnel safety value SRTunSlope safety value SRSlpAnd (4) corresponding weight values.
3. A transportation path planning method according to claim 2, characterized in that: the omega1、ω2、ω3、ω4、ω5Values are respectively omega1＝0.45，ω2＝0.1，ω3＝0.2，ω4＝0.15，ω5＝0.1。
4. A transportation path planning method according to claim 1, characterized in that: at least one path of the security index value RSI is larger than 80, and if the path of the security index value RSI is smaller than 80, the path is re-planned.
5. A transportation path planning method according to claim 1, characterized in that: the safety value SR of the road conditionRCCalculating according to the road surface damage condition index PCI and the route linear safety value ASI of the path:
SRRC＝PCIgω’1+ASIgω”1；
ω’1＝0.3，ω”10.7; respectively corresponding weights of a damage condition index PCI and a route linear safety value ASI;
the route alignment safety value ASI gives a point depending on the linear incongruity and the sight distance shortage existing on the path.
6. A transportation path planning method according to claim 4, characterized in that: the full score of the route linear safety value ASI is 100 minutes, linear incongruity positions existing on a path comprise a steep slope and a sharp bend, and 3 minutes are deducted from each position.
7. A transportation path planning method according to claim 1, characterized in that: the road traffic value SRTPIDividing the route into n road sections, scoring the traffic condition TPI of each road section, and dividing the traffic condition TPI into 100, 90, 80, 70 and 60 according to the congestion condition;
traffic value SR over the entire routeTPI:
8. A transportation path planning method according to claim 1, characterized in that: the bridge safety value SRBrgIs a bridge Total technology status safety score SR'BrgAnd bridge safety evaluation score SR'BrgWeighted sum after:
SRBrg＝ω'3gSR'Brg+ω”3gSR”Brg；
bridge overall technology status safety score SR'BrgThe score is divided into 1, 2, 3, 4 and 5 according to the state, the scores of 1 and 2 are 100, the score of 3 is 80, the score of 4 is 40, and the score of 5 is 0;
bridge safety evaluation score SR'BrgAnd scoring according to the bridge evaluation index.
9. A transportation path planning method according to claim 7, characterized in that: the tunnel safety value SRTunIs a tunnel total technology status safety score SR'TunWith the evaluation score SR of tunnel security'TunWeighted sum after:
SRTun＝ω'4gSR'Tun+ω”4gSR”Tun；
the evaluation grades of the overall technical conditions of the tunnel are divided into 1, 2, 3, 4 and 5, the scores of the 1 class and the 2 class are 100, the score of the 3 class is 80, the score of the 4 class is 40 and the score of the 5 class is 0;
tunnel safety evaluation score SR'TunAnd scoring according to the tunnel evaluation index.
10. A transportation path planning method according to claim 1, characterized in that: the side slope safety value SRSlpGrading the technical conditions of the slopes according to the technical conditions of the slopes and sequentially grading the technical conditions of the slopes into 100, 80, 60, 40 and 0.
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