CN111127885B - Traffic control method and system for low-emission urban area - Google Patents
Traffic control method and system for low-emission urban area Download PDFInfo
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- G—PHYSICS
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- G08G—TRAFFIC CONTROL SYSTEMS
- G08G1/00—Traffic control systems for road vehicles
- G08G1/01—Detecting movement of traffic to be counted or controlled
- G08G1/0104—Measuring and analyzing of parameters relative to traffic conditions
- G08G1/0125—Traffic data processing
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- G—PHYSICS
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- G—PHYSICS
- G08—SIGNALLING
- G08G—TRAFFIC CONTROL SYSTEMS
- G08G1/00—Traffic control systems for road vehicles
- G08G1/01—Detecting movement of traffic to be counted or controlled
- G08G1/0104—Measuring and analyzing of parameters relative to traffic conditions
- G08G1/0137—Measuring and analyzing of parameters relative to traffic conditions for specific applications
- G08G1/0145—Measuring and analyzing of parameters relative to traffic conditions for specific applications for active traffic flow control
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Abstract
A traffic control method for a low-emission urban area comprises the following steps: step 1, estimating the regional pollutant concentration; step 2, pricing the charge of the high pollution area; step 3, calculating emission reduction benefits of regional motor vehicles; and 4, checking and collecting the toll for the vehicles passing through the area according to the optimal management and control rate obtained in the step 3. The invention also comprises a system for implementing the method, which comprises high-definition intelligent card gate equipment and a roadside fixed monitoring station which are arranged at the urban road intersection, wherein the high-definition intelligent card gate equipment, the roadside fixed monitoring station and a cloud server realize real-time data transmission, and the cloud server is provided with a typical road traffic flow analysis module, a regional pollutant concentration estimation module, a charging pricing module of different vehicle types and a regional motor vehicle emission reduction benefit calculation module; and the cloud system outputs the optimal control rate f to the charging equipment of the urban intersection to implement charging. The method implements a targeted motor vehicle management and control measure aiming at the mobile source heavy pollution area, and relieves the road environmental pressure.
Description
Technical Field
The invention relates to a method for improving regional air quality level by charging motor vehicles, belonging to the field of intelligent transportation.
Background
The atmospheric pollution problem is increasingly prominent in the current cities, and the main reason of the phenomenon is that the total number (total flow) of vehicles passing through the urban roads is too much higher than the road load (road traffic capacity), a series of tail gas emissions caused by traffic jam are aggravated, and the current urban motor vehicles still have high-pollution emission vehicle types, so that the optimization of the road vehicle structure is accelerated according to an effective policy, and the low emission and less pollution of the vehicles are realized; the urban air has high quality and good quality.
The method charges the motor vehicles which pass through the urban area with strict air quality requirement and serious pollution so as to change the mode selection of the travelers in the transportation and the travel and accelerate the updating of the motor vehicles. After charging, the influence of different charging rates has difference, but the passing amount of the motor vehicles is reduced certainly, the number of the passing motor vehicles is counted, the concentration of the pollutants on the road is calculated, the emission reduction benefits are compared, and finally the proper charging rate is determined, namely the traffic charging control method is obtained.
Disclosure of Invention
In order to overcome the existing problems, the invention provides a traffic control method and a traffic control system for a low-emission urban area, which are used for performing traffic control of gradient charging on vehicles, so that the aims of reducing pollutant emission and improving air quality are fulfilled.
The invention provides a traffic control method and system for obtaining a toll rate by calculating and comparing total trip cost and actual road pollutant concentration. The charging rate obtained by the invention can provide reference for traffic police and environmental protection departments to control road traffic vehicles, and regulate restricted traffic and charging areas to achieve the purpose of reducing pollutant emission.
The present invention first determines the actual pollutant concentration and the charging rate of the current urban area. And then calculating to obtain the concentration of regional pollutants according to the changed traffic flow of regional road motor vehicles, obtaining the emission reduction benefit of regional motor vehicles, and obtaining the vehicle gradient charging pricing method for effective traffic control. A traffic control method for a low-emission urban area comprises the following specific steps:
1. the zone contaminant concentration is estimated.
And (4) processing and analyzing according to the regional high-definition bayonet to obtain typical road traffic flow information, and calculating the concentration of the road pollutants. Selecting an AERMOD model to research regional pollutants according to emission data of a living source, a moving source and an industrial source in the region to obtain the average concentration P of a certain pollutant in the regiona(unit: mg/m)3)。
2. Pricing charges for highly contaminated areas.
The discharge amount of different vehicle types under the same driving state is greatly different, the vehicle type conversion coefficient is introduced, and the vehicle type of the national V minibus is set as the unit discharge intensity of pmg/m3The unit discharge intensity of corresponding different vehicle types is gammaipmg/m3The terminal pollution discharge of the clean energy automobile is zero, but in order to prevent the terminal pollution discharge from being invalid, the unit emission can be set to be 0.01p, the emission intensity of different automobile types on the road can be obtained by analogy, and the corresponding charging rate is set to be FPij。
3. And calculating emission reduction benefits of regional motor vehicles.
At a charging rate of FPijAnd comparing the traffic volume and the air quality of the areas before and after charging, and judging whether the charging measures are effective mainly according to the air quality:
since the charging will influence the traffic flow, after the charging is adopted, Q is respectively comparedaAnd QbAnd PaAnd PbAnd comparing one by one, analyzing the traffic volume change condition of the motor vehicles passing through the area, and obtaining the actual benefit of charging on the air quality level of the area according to the area air quality improvement result. If Qa-Qb>0，Pa-Pb>When the traffic volume of the motor vehicle is reduced, the atmospheric pollution concentration in the toll collection area is reduced, and the toll collection measures have obvious effect on improving the air quality of urban areas; if Qa-Qb≤0，Pa-Pb>0, the traffic volume of the motor vehicle passing through the area is increased, the air quality of the area can be still improved, the structure of the motor vehicle is optimized, the charging can be proved to improve the air quality level, the structure optimization of the motor vehicle is accelerated, and multiple benefits are realized; qa-Qb≤0，Pa-PbIf the value is less than or equal to 0, the performance in the area after charging is poor, and the charging measures need to be adjusted.
According to the national pollutant emission standard of motor vehicles, the vehicle types are arranged according to tenDividing each of six emission standards into different categories, and introducing a vehicle model conversion coefficient gammaiWherein the unit discharge intensity is set as p mg/m for the type of the national V minibus3The basic charge rate is f (Yuan/vehicle), and the unit emission intensity of different vehicle types is gammaip mg/m3The charging rate is gammaif, the emission intensity and the charge rate of different vehicle types on the road can be obtained by analogy, and an objective function is constructed as follows:
if the pollutant concentration is required to be reduced compared with that before the control, the pollutant concentration is substituted into the concentration parameters of pollutants discharged by social vehicles and buses, and the two formulas are combined to obtain the pollutant concentration
PEmission reduction＝Pin-Pb>0, satisfies Fin<FHoneysuckle stem and leaf (3)
Equation (3) indicates that the total contaminant concentration in the area is reduced and must meet a charge rate that is less than a certain tolerance of the public at society. P can be obtained by calculating the formula (3) under the constraintEmission reductionAnd gammaif, an optimal governing rate f.
4. And (4) checking and collecting the toll for the vehicles passing through the area according to the optimal management and control rate f obtained in the step (3).
The invention also comprises a traffic control system of the low-emission urban area, which comprises high-definition intelligent card gate equipment and a roadside fixed monitoring station which are arranged at an urban road intersection, wherein the high-definition intelligent card gate equipment, the roadside fixed monitoring station and a cloud server realize real-time data transmission, and the traffic control system is characterized in that: the cloud server is provided with a typical road traffic flow analysis module, a regional pollutant concentration estimation module, a charging pricing module for different vehicle types and a regional motor vehicle emission reduction benefit calculation module;
typical road traffic flow analysis module: based on high-definition checkpoint data and motor vehicle registration information, road section traffic flow data in the statistical time of the designated checkpoint are accurately analyzed, and total traffic flow, various vehicle types, local/external vehicles and new vehicles are visually reflected in the form of a chartEnergy source data of different periods. According to the classification of the national emission standards of motor vehicles, accurately analyzing and processing the traffic flow data of various emission standard vehicle types within the statistical time of a specified checkpoint, and displaying the traffic flow data in a chart mode; the regional pollutant concentration estimation module specifically comprises: and (4) processing and analyzing according to the regional high-definition bayonet to obtain typical road traffic flow information, and calculating the concentration of the road pollutants. Selecting an AERMOD model to simulate the pollutant concentration of the area by combining the emission data of a living source, a moving source and an industrial source in the area to obtain the average certain pollutant concentration P of the areaa(unit: mg/m)3)；
The charging pricing module for different vehicle types specifically comprises: the discharge amount of different vehicle types under the same driving state is greatly different, the vehicle type conversion coefficient is introduced, and the vehicle type of the national V minibus is set as the unit discharge intensity p mg/m3The unit discharge intensity of corresponding different vehicle types is gammaip mg/m3The terminal pollution discharge of the clean energy automobile is zero, but in order to prevent the terminal pollution discharge from being invalid, the unit emission can be set to be 0.01p, the emission intensity of different automobile types on the road can be obtained by analogy, and the corresponding charging rate is set to be FPij。
The regional motor vehicle emission reduction benefit calculation module comprises:
at a charging rate of FPijAnd comparing the traffic volume and the air quality of the areas before and after charging, and judging whether the charging measures are effective mainly according to the air quality:
since the charging will influence the traffic flow, after the charging is adopted, Q is respectively comparedaAnd QbAnd PaAnd PbAnd comparing one by one, analyzing the traffic volume change condition of the motor vehicles passing through the area, and obtaining the actual benefit of charging on the air quality level of the area according to the area air quality improvement result. If Qa-Qb>0，Pa-Pb>0, the traffic volume of the motor vehicle is reduced, and the atmospheric pollution in the toll area is heavyThe degree is reduced, and the charging measures have obvious effect on improving the air quality of the urban area; if Qa-Qb≤0，Pa-Pb>0, the traffic volume of the motor vehicle passing through the area is increased, the air quality of the area can be still improved, the structure of the motor vehicle is optimized, the charging can be proved to improve the air quality level, the structure optimization of the motor vehicle is accelerated, and multiple benefits are realized; qa-Qb≤0，Pa-PbIf the value is less than or equal to 0, the performance in the area after charging is poor, and the charging measures need to be adjusted.
According to the national pollutant emission standard of motor vehicles, vehicle types are divided according to six emission standards of each of ten categories, and a vehicle type conversion coefficient gamma is introducediWherein the unit discharge intensity is set as p mg/m for the type of the national V minibus3The basic charge rate is f (Yuan/vehicle), and the unit emission intensity of different corresponding vehicle types is gammaip mg/m3The charging rate is gammaif, the emission intensity and the charge rate of different vehicle types on the road can be obtained by analogy, and an objective function is constructed as follows:
if the pollutant concentration is required to be reduced compared with that before the control, the pollutant concentration is substituted into the concentration parameters of pollutants discharged by social vehicles and buses, and the two formulas are combined to obtain the pollutant concentration
PEmission reduction＝Pin-Pb>0, satisfies Fin<FHoneysuckle stem and leaf (3)
Formula (3) shows that the total pollutant concentration in the area is reduced, and the charging rate is lower than a certain tolerance of the public; p can be obtained by calculating the formula (3) under the constraintEmission reductionAnd gammaif, optimal management and control rate f;
and the cloud system outputs the optimal control rate f to the charging equipment on the traffic gate to implement charging.
The present invention first determines an estimated regional pollutant concentration and a certain pricing charge. And obtaining the relation between the two under the influence of regional charging to obtain the achievable emission reduction benefit. And then constructing a target function according to parameters such as actual traffic flow of a road, pollutant discharge amount of vehicles, total charge and the like, solving an optimal scheme by a system on a cloud server through the high-definition intelligent card port equipment and the Internet of things of a roadside fixed monitoring station to finally obtain reasonable charge pricing, assisting traffic polices and environmental protection departments in managing and controlling road traffic vehicles, and adjusting travel paths of the vehicles so as to achieve the purpose of optimizing the environment of a heavily polluted area.
The invention has the advantages that: the urban road traffic flow control system can effectively reduce the traffic flow of the urban central area, relieve the road congestion degree, improve the traffic capacity of the urban road, implement the targeted motor vehicle control measures aiming at the mobile source heavily-polluted area and relieve the road environmental pressure.
Drawings
FIG. 1 is a flow chart of the method of the present invention.
Detailed Description
The following drawings further illustrate the technical solution of the present invention.
A traffic control method for a low-emission urban area comprises the following specific steps:
1. the zone contaminant concentration is estimated.
And (4) processing and analyzing according to the high-definition bayonet in Hangzhou city to obtain typical road traffic flow information and calculate the concentration of the road pollutants. Selecting an AERMOD model to research regional pollutants by combining emission data of urban living sources, mobile sources and industrial sources to obtain the average concentration P of a certain pollutant in a regiona(unit: mg/m)3)。
2. Pricing charges for highly contaminated areas.
The discharge amount of different vehicle types under the same driving state is greatly different, the vehicle type conversion coefficient is introduced, and the vehicle type of the national V minibus is set as the unit discharge intensity p mg/m3The unit discharge intensity of corresponding different vehicle types is gammaip mg/m3The terminal pollution discharge of the clean energy automobile is zero, but in order to prevent the terminal pollution discharge from being invalid, the unit emission can be set to be 0.01p, the emission intensity of different automobile types on the road can be obtained by analogy, and the corresponding charging rate is set to be FPij。
3. And calculating emission reduction benefits of regional motor vehicles.
At a charging rate of FPijAnd comparing the traffic volume and the air quality of the areas before and after charging, and judging whether the charging measures are effective mainly according to the air quality:
since the charging will influence the traffic flow, after the charging is adopted, Q is respectively comparedaAnd QbAnd PaAnd PbAnd comparing one by one, analyzing the traffic volume change condition of the motor vehicles passing through the area, and obtaining the actual benefit of charging on the air quality level of the area according to the area air quality improvement result. If Qa-Qb>0，Pa-Pb>When the traffic volume of the motor vehicle is reduced, the atmospheric pollution concentration in the toll collection area is reduced, and the toll collection measures have obvious effect on improving the air quality of urban areas; if Qa-Qb≤0，Pa-Pb>0, the traffic volume of the motor vehicle passing through the area is increased, the air quality of the area can be still improved, the structure of the motor vehicle is optimized, the charging can be proved to improve the air quality level, the structure optimization of the motor vehicle is accelerated, and multiple benefits are realized; qa-Qb≤0，Pa-PbIf the value is less than or equal to 0, the performance in the area after charging is poor, and the charging measures need to be adjusted.
According to the national pollutant emission standard of motor vehicles, vehicle types are divided according to six emission standards of each of ten categories, and a vehicle type conversion coefficient gamma is introducediWherein the unit discharge intensity is set as p mg/m for the type of the national V minibus3The basic charge rate is f (Yuan/vehicle), and the unit emission intensity of different vehicle types is gammaip mg/m3The charging rate is gammaif, the emission intensity and the charge rate of different vehicle types on the road can be obtained by analogy, and an objective function is constructed as follows:
if the pollutant concentration is required to be reduced compared with that before the control, the pollutant concentration is substituted into the concentration parameters of pollutants discharged by social vehicles and buses, and the two formulas are combined to obtain the pollutant concentration
PEmission reduction＝Pin-Pb>0, satisfies Fin<FHoneysuckle stem and leaf (3)
Equation (3) indicates that the total contaminant concentration in the area is reduced and must meet a charge rate that is less than a certain tolerance of the public at society. P can be obtained by calculating the formula (3) under the constraintEmission reductionAnd gammaif, an optimal governing rate f.
4. And (4) checking and collecting the toll for the vehicles passing through the area according to the optimal management and control rate f obtained in the step (3).
The invention also comprises a traffic control system of the low-emission urban area, which comprises high-definition intelligent card gate equipment and a roadside fixed monitoring station which are arranged at an urban road intersection, wherein the high-definition intelligent card gate equipment, the roadside fixed monitoring station and a cloud server realize real-time data transmission, and the traffic control system is characterized in that: the cloud server is provided with a typical road traffic flow analysis module, a regional pollutant concentration estimation module, a charging pricing module for different vehicle types and a regional motor vehicle emission reduction benefit calculation module;
typical road traffic flow analysis module: based on high-definition checkpoint data and motor vehicle registration information, road section traffic flow data in the statistical time of the designated checkpoint are accurately analyzed, and different period data including total flow, various vehicle types, local/external vehicles and new energy are visually reflected in a chart form. According to the classification of the national emission standards of motor vehicles, accurately analyzing and processing the traffic flow data of various emission standard vehicle types within the statistical time of a specified checkpoint, and displaying the traffic flow data in a chart mode; the regional pollutant concentration estimation module specifically comprises: and (4) processing and analyzing according to the regional high-definition bayonet to obtain typical road traffic flow information, and calculating the concentration of the road pollutants. Selecting an AERMOD model to simulate the pollutant concentration of the area by combining the emission data of a living source, a moving source and an industrial source in the area to obtain the average certain pollutant concentration P of the areaa(unit of：mg/m3)；
The charging pricing module for different vehicle types specifically comprises: the discharge amount of different vehicle types under the same driving state is greatly different, the vehicle type conversion coefficient is introduced, and the vehicle type of the national V minibus is set as the unit discharge intensity p mg/m3The unit discharge intensity of corresponding different vehicle types is gammaip mg/m3The terminal pollution discharge of the clean energy automobile is zero, but in order to prevent the terminal pollution discharge from being invalid, the unit emission can be set to be 0.01p, the emission intensity of different automobile types on the road can be obtained by analogy, and the corresponding charging rate is set to be FPij。
The regional motor vehicle emission reduction benefit calculation module comprises:
at a charging rate of FPijAnd comparing the traffic volume and the air quality of the areas before and after charging, and judging whether the charging measures are effective mainly according to the air quality:
since the charging will influence the traffic flow, after the charging is adopted, Q is respectively comparedaAnd QbAnd PaAnd PbAnd comparing one by one, analyzing the traffic volume change condition of the motor vehicles passing through the area, and obtaining the actual benefit of charging on the air quality level of the area according to the area air quality improvement result. If Qa-Qb>0，Pa-Pb>When the traffic volume of the motor vehicle is reduced, the atmospheric pollution concentration in the toll collection area is reduced, and the toll collection measures have obvious effect on improving the air quality of urban areas; if Qa-Qb≤0，Pa-Pb>0, the traffic volume of the motor vehicle passing through the area is increased, the air quality of the area can be still improved, the structure of the motor vehicle is optimized, the charging can be proved to improve the air quality level, the structure optimization of the motor vehicle is accelerated, and multiple benefits are realized; qa-Qb≤0，Pa-PbIf the value is less than or equal to 0, the performance in the area after charging is poor, and the charging measures need to be adjusted.
According to the stateThe pollutant emission standard of the bullet train is that the train type is divided according to six emission standards of each of ten categories, and the conversion coefficient gamma of the train type is introducediWherein the unit discharge intensity is set as p mg/m for the type of the national V minibus3The basic charge rate is f (Yuan/vehicle), and the unit emission intensity of different vehicle types is gammaip mg/m3The charging rate is gammaif, the emission intensity and the charge rate of different vehicle types on the road can be obtained by analogy, and an objective function is constructed as follows:
if the pollutant concentration is required to be reduced compared with that before the control, the pollutant concentration is substituted into the concentration parameters of pollutants discharged by social vehicles and buses, and the two formulas are combined to obtain the pollutant concentration
PEmission reduction＝Pin-Pb>0, satisfies Fin<FHoneysuckle stem and leaf (3)
Formula (3) shows that the total pollutant concentration in the area is reduced, and the charging rate is lower than a certain tolerance of the public; p can be obtained by calculating the formula (3) under the constraintEmission reductionAnd gammaif, optimal management and control rate f;
and the cloud system outputs the optimal control rate f to the charging equipment on the traffic gate to implement charging.
The present invention first determines an estimated regional pollutant concentration and a certain pricing charge. And obtaining the relation between the two under the influence of regional charging to obtain the achievable emission reduction benefit. And then constructing a target function according to parameters such as actual traffic flow of a road, pollutant discharge amount of vehicles, total charge and the like, solving an optimal scheme by a system on a cloud server through the high-definition intelligent card port equipment and the Internet of things of a roadside fixed monitoring station to finally obtain reasonable charge pricing, assisting traffic polices and environmental protection departments in managing and controlling road traffic vehicles, and adjusting travel paths of the vehicles so as to achieve the purpose of optimizing the environment of a heavily polluted area.
The embodiments described in this specification are merely illustrative of implementations of the inventive concept and the scope of the present invention should not be considered limited to the specific forms set forth in the embodiments but rather by the equivalents thereof as may occur to those skilled in the art upon consideration of the present inventive concept.
Claims (2)
1. A traffic control method for low-emission urban areas comprises the following steps:
step 1, estimating the regional pollutant concentration;
processing and analyzing according to the regional high-definition bayonet to obtain typical road traffic flow information, and calculating the concentration of road pollutants; selecting an AERMOD model to research regional pollutants according to emission data of a living source, a moving source and an industrial source in the region to obtain the average concentration P of a certain pollutant in the regiona mg/m3；
Step 2, pricing the charge of the high pollution area;
the discharge amount of different vehicle types under the same driving state is greatly different, the vehicle type conversion coefficient is introduced, and the vehicle type of the national V minibus is set as the unit discharge intensity p mg/m3The unit discharge intensity of corresponding different vehicle types is gammaip mg/m3The terminal pollution discharge of the clean energy automobile is zero, but in order to prevent the terminal pollution discharge from being invalid, the unit emission can be set to be 0.01p, the emission intensity of different automobile types on the road can be obtained by analogy, and the corresponding charging rate is set to be FPij；
Step 3, calculating emission reduction benefits of regional motor vehicles;
at a charging rate of FPijAnd comparing the traffic volume and the air quality of the areas before and after charging, and judging whether the charging measures are effective mainly according to the air quality:
since the charging will influence the traffic flow, after the charging is adopted, Q is respectively comparedaAnd QbAnd PaAnd PbComparing one by one, analyzing through the regionThe actual benefit of charging on the regional air quality level is obtained according to the change condition of the motor vehicle traffic volume and the regional air quality improvement result; if Qa-Qb>0，Pa-Pb>When the traffic volume of the motor vehicle is reduced, the atmospheric pollution concentration in the toll collection area is reduced, and the toll collection measures have obvious effect on improving the air quality of urban areas; if Qa-Qb≤0，Pa-Pb>0, the traffic volume of the motor vehicle passing through the area is increased, the air quality of the area can be still improved, the structure of the motor vehicle is optimized, the charging can be proved to improve the air quality level, the structure optimization of the motor vehicle is accelerated, and multiple benefits are realized; qa-Qb≤0，Pa-PbIf the value is less than or equal to 0, the performance in the area after charging is poor, and the charging measures need to be adjusted;
according to the national pollutant emission standard of motor vehicles, vehicle types are divided according to six emission standards of each of ten categories, and a vehicle type conversion coefficient gamma is introducediWherein the unit discharge intensity is set as p mg/m for the type of the national V minibus3The basic charge rate is f yuan/vehicle, and the unit emission intensity of corresponding different vehicle types is gammaip mg/m3The charging rate is gammaif, the emission intensity and the charge rate of different vehicle types on the road can be obtained by analogy, and an objective function is constructed as follows:
if the pollutant concentration is required to be reduced compared with that before the control, the pollutant concentration is substituted into the concentration parameters of pollutants discharged by social vehicles and buses, and the two formulas are combined to obtain the pollutant concentration
PEmission reduction＝Pin-Pb>0, satisfies Fin<FHoneysuckle stem and leaf (3)
Formula (3) shows that the total pollutant concentration in the area is reduced, and the charging rate is lower than a certain tolerance of the public; p can be obtained by calculating the formula (3) under the constraintEmission reductionAnd gammaif, optimal management and control rate f;
and 4, checking and collecting the toll for the vehicles passing through the area according to the optimal control rate f obtained in the step 3.
2. The system for implementing the traffic control method for low-emission urban areas according to claim 1, wherein: including setting up at urban road intersection's high definition intelligence bayonet socket equipment, the fixed monitoring station in roadside, high definition intelligence bayonet socket equipment, the fixed monitoring station in roadside realize real-time data transmission with high in the clouds server, its characterized in that: the cloud server is provided with a typical road traffic flow analysis module, a regional pollutant concentration estimation module, a charging pricing module for different vehicle types and a regional motor vehicle emission reduction benefit calculation module;
typical road traffic flow analysis module: accurately analyzing road traffic flow data in the statistical time of the designated gate based on high-definition gate data and motor vehicle registration information, and visually reflecting different period data including total flow, various vehicle types, local/external vehicles and new energy in a chart form; according to the classification of the national emission standards of motor vehicles, accurately analyzing and processing the traffic flow data of various emission standard vehicle types within the statistical time of a specified checkpoint, and displaying the traffic flow data in a chart mode;
the regional pollutant concentration estimation module specifically comprises: processing and analyzing according to the regional high-definition bayonet to obtain typical road traffic flow information, and calculating the concentration of road pollutants; selecting an AERMOD model to simulate the pollutant concentration of the area by combining the emission data of a living source, a moving source and an industrial source in the area to obtain the average certain pollutant concentration P of the areaa mg/m3；
The charging pricing module for different vehicle types specifically comprises: the discharge amount of different vehicle types under the same driving state is greatly different, the vehicle type conversion coefficient is introduced, and the vehicle type of the national V minibus is set as the unit discharge intensity p mg/m3The unit discharge intensity of corresponding different vehicle types is gammaip mg/m3The terminal pollution discharge of the clean energy automobile is zero, but in order to prevent the terminal pollution discharge from being invalid, the unit emission can be set to be 0.01p, and the emission intensity of different automobile types on the road can be obtained by analogy, and the corresponding charge is set according to the emission intensityA charge rate of FPij；
The regional motor vehicle emission reduction benefit calculation module comprises:
at a charging rate of FPijAnd comparing the traffic volume and the air quality of the areas before and after charging, and judging whether the charging measures are effective mainly according to the air quality:
since the charging will influence the traffic flow, after the charging is adopted, Q is respectively comparedaAnd QbAnd PaAnd PbComparing one by one, analyzing the traffic volume change condition of the motor vehicles passing through the area, and obtaining the actual benefit of charging on the air quality level of the area according to the area air quality improvement result; if Qa-Qb>0，Pa-Pb>When the traffic volume of the motor vehicle is reduced, the atmospheric pollution concentration in the toll collection area is reduced, and the toll collection measures have obvious effect on improving the air quality of urban areas; if Qa-Qb≤0，Pa-Pb>0, the traffic volume of the motor vehicle passing through the area is increased, the air quality of the area can be still improved, the structure of the motor vehicle is optimized, the charging can be proved to improve the air quality level, the structure optimization of the motor vehicle is accelerated, and multiple benefits are realized; qa-Qb≤0，Pa-PbIf the value is less than or equal to 0, the performance in the area after charging is poor, and the charging measures need to be adjusted;
according to the national pollutant emission standard of motor vehicles, vehicle types are divided according to six emission standards of each of ten categories, and a vehicle type conversion coefficient gamma is introducediWherein the unit discharge intensity is set as p mg/m for the type of the national V minibus3The basic charge rate is f yuan/vehicle, and the unit emission intensity of corresponding different vehicle types is gammaip mg/m3The charging rate is gammaif, the emission intensity and the charge rate of different vehicle types on the road can be obtained by analogy, and an objective function is constructed as follows:
if the pollutant concentration is required to be reduced compared with that before the control, the pollutant concentration is substituted into the concentration parameters of pollutants discharged by social vehicles and buses, and the two formulas are combined to obtain the pollutant concentration
PEmission reduction＝Pin-Pb>0, satisfies Fin<FHoneysuckle stem and leaf (3)
Formula (3) shows that the total pollutant concentration in the area is reduced, and the charging rate is lower than a certain tolerance of the public; p can be obtained by calculating the formula (3) under the constraintEmission reductionAnd gammaif, optimal management and control rate f;
and the cloud system outputs the optimal control rate f to the charging equipment on the traffic gate to implement charging.
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| CN201911308334.4A CN111127885B (en) | 2019-12-18 | 2019-12-18 | Traffic control method and system for low-emission urban area |
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