CN113591327A - Local traffic planning multi-scale evaluation method based on VISSIM - Google Patents
Local traffic planning multi-scale evaluation method based on VISSIM Download PDFInfo
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Abstract
The invention relates to the technical field of traffic control, in particular to a local traffic planning multi-scale evaluation method based on VISSIM. The method comprises the following steps: inputting a traffic planning scheme of a current local area; acquiring a traffic map of a current local area, analyzing a topological structure in the traffic map, and making a judgment standard; optimizing the traffic planning scheme of the current local area according to the scores of indexes used by the traffic state evaluation standard, the safety evaluation standard and the environmental protection evaluation standard to obtain several types of new traffic planning schemes; investigating audience groups in the current local area, and scoring each new traffic planning scheme through the audience groups; a new traffic planning scenario is selected. The invention adopts the VISSIM simulation system to simulate and evaluate the local traffic planning, and also adds the personal intention information, so that the evaluation method is innovated, and a new system is formed.
Description
Technical Field
The invention relates to the technical field of traffic control, in particular to a local traffic planning multi-scale evaluation method based on VISSIM.
Background
The planning and perfection of urban traffic infrastructure aims to meet the traffic demand of urban residents, the traditional centralized urban planning method usually takes a determined urban center as the core of traffic planning to carry out road network planning and traffic design, and can meet the traffic demand in a short time, however, with the advancement of modern process, the urban development shows the characteristics of regional characteristics and localized development, the traffic is comprehensively planned and changed into a local planning, the traffic is changed from large to complete originally to small to precise, the local traffic is taken as the key point, a safe, reliable, comprehensive, multi-mode, high-efficiency and environment-friendly traffic system is built, the improvement of the local traffic quality and the life quality of the city becomes the key point of the planning, and the concept of green travel also determines the richer traffic travel mode in the local traffic field, including walking, Bicycles, electric vehicles, motor vehicles, etc., which place new demands on local traffic planning.
A traffic planning tool VISSIM based on traffic information and big data means is commonly used in traffic planning, and brings a modern planning method. Meanwhile, a new practical problem is presented, namely, the planning is over-dependent on a simulation means, the simulated data is derived from traffic monitoring data, although the state of the traffic and the planning effect can be more completely reflected, the defects of simple data analysis are displayed in the aspects of traffic flowing property, motorization, population scale growth, population quality improvement, upgrading of the traffic demands of the living local traffic area and the like, higher requirements are also put forward for an input data set of the VISSIM, and after deep understanding, a plurality of non-datamation demands are found to be contradictory in fact in the aspect of local traffic optimization, the invention constructs a local traffic planning multi-scale evaluation method and system based on the VISSIM, solves the contradictions, improves the practical effect of local traffic optimization, and takes the greatest role when the local traffic planning is scientifically carried out, and (5) construction of harmonious green traffic.
Disclosure of Invention
The invention aims to provide a local traffic planning multi-scale evaluation method based on VISSIM, which comprises the following steps: inputting a traffic planning scheme of a current local area; acquiring a traffic map of a current local area, analyzing a topological structure in the traffic map, and making judgment standards, wherein the judgment standards comprise a traffic state evaluation standard, a safety evaluation standard and an environmental protection evaluation standard; indexes used by the traffic state evaluation standard comprise the maximum queuing length of vehicles, the parking times, delay caused by parking and the actual service level of a road, wherein the maximum queuing length of the vehicles refers to the longest queuing occurring in traffic monitoring within a preset time, the parking times refer to the average parking times of the vehicles in a traffic flow, and the actual service level of the road refers to the actual passing effect of the road divided into a plurality of levels; indexes used by the safety evaluation standard comprise a speed range, the separation degree of the motor vehicle and the non-motor vehicle and traffic flow outburst points, wherein the speed range refers to speed change in an explicit speed limit range and a non-explicit speed limit range, the separation degree of the motor vehicle and the non-motor vehicle refers to traffic arrangement among the motor vehicle, the non-motor vehicle and pedestrians passing through the area, and the traffic flow outburst quantity point refers to the number of access points of traffic flow of a main road to a diversion road or a variable road range; indexes used by the environmental protection evaluation standard comprise CO emission, NOx emission and VOC emission; generating data input into the VISSIM simulation system; performing analog simulation by using a VISSIM simulation system; scoring indexes used by the traffic state evaluation standard, the safety evaluation standard and the environmental protection evaluation standard; optimizing the traffic planning scheme of the current local area according to the scores of indexes used by the traffic state evaluation standard, the safety evaluation standard and the environmental protection evaluation standard to obtain several types of new traffic planning schemes; investigating audience groups in the current local area, and scoring each new traffic planning scheme through the audience groups; a new traffic planning scenario is selected.
The invention adopts the VISSIM simulation system to simulate and evaluate the local traffic planning, and also adds the personal intention information, so that the evaluation method is innovated, and a new system is formed.
Drawings
Fig. 1 is a block diagram of a local traffic planning evaluation data processing flow.
Detailed Description
The present application is further described below with reference to the accompanying drawings.
Referring to fig. 1, a local traffic planning multi-scale evaluation method based on VISSIM includes the following steps:
step 201, inputting a traffic planning scheme of a current local area; the method comprises the steps of inputting a traffic planning scheme of a current local area, carrying out low-altitude remote sensing on the current local area, and obtaining a traffic remote sensing map. The map needs to cover the area of the surrounding audience population in order to finally determine whether the judgment of the surrounding population on the local traffic planning is reasonable.
indexes used by the traffic state evaluation standard comprise the maximum queuing length of vehicles, the parking times, delay caused by parking and the actual service level of roads;
the maximum queuing length of the vehicles refers to the longest queuing occurring in traffic monitoring within a preset time, and the preset time interval can be set and is usually 1 h;
the parking times refer to the average parking times of the vehicles in the traffic flow, in particular to the average parking times of the vehicles in the traffic flow caused by traffic conditions, traffic rules, rush flows, parking/non-parking and the like;
a delay caused by parking refers to a short stop due to parking of an individual vehicle or a stop time caused in a traffic scene;
the actual road service level refers to that the actual road passing effect is divided into a plurality of levels, for example, the actual road passing effect is divided into 1 to 6 levels, wherein the level 1 is a clear state, and the vehicle can be in a speed form of more than 70% of the speed limit of the road. Level 6 is a jammed state, the vehicle can only assume an alternating state of forced stopping and advancing;
of course, the indexes used by the traffic state evaluation criteria may also include vehicle travel time, delays, dynamics, parking space distribution, etc.;
vehicle travel time refers to the time in seconds for a vehicle to pass through a monitoring area; the delay refers to time loss caused by various influence parameters such as traffic load, structure, conflict, traffic rules, reaction time of traffic participants, dynamic conditions of various entities (driving speed, acceleration and deceleration, pedestrian speed), safety clearance and the like;
dynamic characteristics refer to changes in traffic conditions due to temporary traffic control or other temporary traffic regulation changes.
Indexes used by the safety evaluation standard comprise a speed range, the separation degree of the motor vehicle and the non-motor vehicle and a traffic flow outburst point;
wherein, the speed range refers to the speed change in the explicit speed limit range and the non-explicit speed limit range, and the speed is in a highly relevant state with the accident occurrence;
the separation degree of the motor vehicle and the non-motor vehicle means that the motor vehicle, the non-motor vehicle and the pedestrian pass through the traffic arrangement of the area, and the street overpass, the pedestrian crossing, the non-motor vehicle lane and the like are considered application scenes;
the traffic intrusion amount point refers to the number of points at which the traffic of the main road is received into the branch road or the variable road range.
Indexes used by the environmental protection evaluation standard comprise CO emission, NOx emission and VOC emission; the part of environmental protection evaluation standards have important reference values for accurately estimating the congestion state of the road and the vehicle running state.
In this embodiment, the index used by the traffic state evaluation standard and the index used by the safety evaluation standard may be obtained by a traffic monitoring system disposed in the current local area, and the index used by the environmental protection evaluation standard may be obtained by an environmental measurement sensor disposed in the current local area.
The local traffic state information acquired by means of a multi-source traffic monitoring system, low-altitude remote sensing and the like comprises but is not limited to information such as pictures, sounds, texts and the like. The method is characterized in that conditions such as related vehicles, congestion and the like acquired by a multidimensional intelligent traffic monitoring software and hardware system are digitized according to traffic related requirements and provided for information used by simulation software.
The content of each index can be summarized into a traffic index matrix of the current local area, and can be one of input information of VISSIM simulation.
In this embodiment, the problems in the traffic planning scheme of the current local area are analyzed and identified, keywords in the problems are collected, and the evaluation criteria to which the key factors possibly related belong are comprehensively grasped. The direction of optimization and the final criteria are determined.
At step 203, data input into the VISSIM simulation system is generated, which may include vehicle dynamics, vehicle speed, acceleration, deceleration, vehicle type, engine power, and driver behavior related characteristics such as reaction time, frequency, length of scanned traffic, etc. The randomness of the traffic flow is approximated by using a random number generator and distribution, and the input data, such as the speed of each vehicle category, is taken as the median of the speed distribution. And obtaining and analyzing 10 different traffic situations of the vehicles under the same traffic load, and presenting key indexes in the traffic state evaluation standard, the safety evaluation standard and the environmental protection evaluation standard.
And step 206, optimizing the traffic planning scheme of the current local area according to the scores of the indexes used by the traffic state evaluation standard, the safety evaluation standard and the environmental protection evaluation standard to obtain several types of new traffic planning schemes, wherein in the scheme optimization process, the simulation of the step 204 can be repeatedly performed on each determined type of new traffic planning scheme to better optimize the new traffic planning scheme.
Step 207, investigating audience groups in the current local area, scoring each new traffic planning scheme through the audience groups, specifically, making and designing a design drawing according to the several new traffic planning schemes provided in step 206, establishing a scoring table for each new traffic planning scheme, scoring audience groups in the current local area based on the personal intention of local traffic planning, and constructing a social assessment standard.
The socialized evaluation standard of regional traffic is obtained through the current local region investigation, and the local traffic satisfaction investigation is carried out on the distribution of the crowd in the region according to the modes of experts, students and common citizens. And carrying out double scoring on attention and satisfaction degree of regional traffic. Key figures of the assessment criteria of the socioedema are obtained.
And modifying key indexes of specific improvement points of the local traffic planning according to the scores of the above contents, and re-planning the local traffic by adopting VISSIM to finally realize an optimization scheme.
And selecting the optimal scheme of the traffic plan according to the contents, and judging and scoring the willingness of people. Selecting corresponding personnel groups according to the distribution of surrounding personnel to be divided into experts, students and common citizens, wherein the experts refer to people who have certain practical experience on traffic planning or have index understanding on traffic planning at a high cultural level; citizens refer to people at various age stages who are more concerned about personal feelings; students designate students who are reading at high school or at a stage above university, with future thoughts and willingness to have a growing environment for traffic planning. The three groups of people score according to the established scoring table in the local traffic planning.
Taking a road in a certain local area as an example, obtaining four types of new traffic planning schemes P1P 2P 3P 4 according to the steps, wherein the scheme P1 is a normal local traffic scheme, the scheme P2 focuses on arrangement of parking spaces in local traffic, a special parking lot is arranged, and fast and slow lanes are mixed, but a core area does not need to enter a motor vehicle and has enough parking spaces; the P3 scheme focuses on non-motor vehicles, large-area non-motor vehicle lanes are arranged, parking spaces are few, regional traffic is mainly the non-motor vehicles and walking, the motor vehicles only go around the outside, but more greenbelts are provided for improving the environmental protection index. The P4 scheme is modified minimally, and longitudinal parking lots are arranged on two sides of a road, so that non-motor vehicles and motor vehicles can pass through the local road.
The four new traffic planning schemes are evaluated according to the traffic states of different planning schemes to obtain a table 1, and the numerical values in all the tables are normalized, so that the influence of a unit on analysis is removed. The environmental protection evaluation standards are carried out on each scheme to obtain the values in the table 2, and the values are normalized.
TABLE 1 traffic status assessment for different planning scenarios
| Scheme(s) | Maximum length of queue for vehicle | Delay of | Number of stops | Delay caused by parking | Road actual service level |
| P1 | 20.5 | 22.6 | 3.8 | 4.3 | 3 |
| P2 | 22.6 | 21.8 | 1.9 | 3.1 | 3 |
| P3 | 75.5 | 22.5 | 5 | 8 | 3 |
| P4 | 43.1 | 32.6 | 5.2 | 9.6 | 4 |
TABLE 2 environmental evaluation of different planning scenarios
| Scheme(s) | CO emission amount | NOx emissions | Discharge amount of VOC | Vehicle fuel consumption |
| P1 | 29.6 | 5.8 | 6.6 | 0.88 |
| P2 | 25.0 | 5.3 | 6.2 | 0.85 |
| P3 | 36.9 | 7.6 | 8.9 | 1.02 |
| P4 | 37.6 | 8.1 | 9.4 | 1.08 |
TABLE 3 Security assessment of different planning scenarios
| Scheme(s) | Speed range | Degree of separation of motor vehicles from non-motor vehicles | Traffic flow burst point |
| P1 | 40 | 2 | 75 |
| P2 | 40 | 2 | 25 |
| P3 | 20 | 0 | 42 |
| P4 | 30 | 3 | 105 |
Among four new traffic planning schemes for local traffic planning, the P1 scheme is a normal local traffic scheme, the scheme has no outstanding expression in the aspects of traffic state and environment-friendly state, and the number of the traffic flow break-in points is medium; the P2 proposal has more outstanding performance in terms of traffic state because the driving area of the motor vehicle and the enlarged parking area are reduced, but the environmental evaluation standard is lower because the parking area is large and greening cannot be carried out, and the traffic flow outburst point is also reduced because the traffic flow is reduced; the P3 scheme mainly aims the regional traffic to the non-motor vehicles, so that the regional traffic is influenced by the non-motor vehicles if the motor vehicles are operated, and the traffic jam is caused; in the environmental protection aspect, the environmental protection evaluation standard is not well performed due to severe congestion of the motor vehicle, and the vehicle speed is lower in the safety evaluation aspect; the longitudinal parking lots are arranged on the two sides of the road in the P4 scheme, the arrangement mode can increase the parking positions, but the congestion is serious compared with the two schemes P1/P2, the frequent vehicle in and out starting and stopping of the longitudinal parking lots are caused, the traffic flow is too much, and the environmental protection standard performance is poor.
In the four new traffic planning schemes, judgment is basically given through standard comparison of tables 1 to 3, audience groups are judged according to the four schemes, and judgment and scoring are carried out according to three groups, namely experts, citizens and students.
The score for each item is 1-10, 1 score is not concerned with this, and 10 scores are very concerned. Corresponding sample crowds are selected from audiences of local traffic, and scores of three evaluation indexes show that the concern of the interviewee on the local regional traffic is firstly the traffic safety problem, and then the problem of traffic state is ranked at last for the environmental protection problem as shown in table 5. Because the audiences of the local traffic areas are experts, students, citizens, and therefore, all three research concerns should be cared for.
TABLE 4 attention degree of evaluation index of the audience
| Identity | Number of people | Traffic state | Safe state | Environmental protection state |
| Expert | 40 | 9.65 | 9.63 | 8.23 |
| Citizen | 40 | 8.75 | 9.43 | 8.55 |
| Student's desk | 40 | 9.73 | 9.68 | 8.65 |
| Mean value of | 40 | 9.38 | 9.58 | 8.47 |
| Sorting | 2 | 1 | 3 |
For the weight distribution of the three categories of audience opinions, four distribution modes are designed, which are respectively identified by S1 to S4, wherein S1: all weight values are the same; s2: paying attention to the opinions of the experts, wherein the weight of the opinions of the experts is the highest; s3: paying attention to the opinions of the students, wherein the opinion weight of the students is the highest; s4 focuses on the citizen' S opinion, which has the highest weight. The ranking is from 1 to 4. Table 5 was obtained by data analysis.
TABLE 5 different attention scheme selection rankings
It can be seen that the ranking is basically the same no matter what weight is concerned, and the P2 scheme is the best choice. The P2 scheme "reduces the driving area of the motor vehicle and enlarges the parking area" is put to the first place in the audience group of the local traffic planning, so that the audience group pays more attention to the parking problem of the motor vehicle in the area in the aspect of the local traffic planning.
Therefore, in the evaluation system, the P2 scheme is shown to be the preferred scheme for local traffic planning. The method has important innovative guidance function on the final selection of local traffic planning.
The embodiment performs VISSIM analog simulation analysis on local traffic, and provides a corresponding solution; meanwhile, according to the personnel involved in the local traffic, the scoring of the local traffic plan is inquired in a sampling survey mode; and adding the scores as evaluation indexes into the evaluation system, and finally selecting and evaluating the optimal local traffic planning scheme. The local traffic planning method considers the elements of the traditional VISSIM analog simulation, adds non-digital audience and personnel wish information, and provides a new method for evaluating and selecting a local traffic planning scheme and constructing people-oriented local traffic of the smart city.
In the embodiment, the VISSIM simulation system is adopted to simulate and evaluate local traffic planning, and human intention information is added, so that the evaluation method is innovated, and a new system is formed.
The local traffic planning is a traffic scheme design which has a small actual planning area and shows the direct correlation with surrounding personnel in a short time with a planning effect, and is a local traffic planning according to local conditions. Has larger spatial diversity and audience-person diversity.
The VISSIM simulation system is a microscopic simulation modeling tool based on time intervals and driving behavior, and is used for traffic modeling of urban traffic and public traffic operations. The method adopts the collected local traffic information and carries out analog analysis of the traffic state through digitization.
The evaluation of local traffic function design, effect and actual problems is given by adding the information of personal intention in the evaluation system according to the subjective intention of local traffic audiences and crowds and the appeal of traffic states, and the evaluation is completely independent of information factors and evaluation results of VISSIM simulation software.
The people of the embodiment voluntarily score the judgment of local traffic, can make corresponding score registration according to the frequency of words appearing in the investigation process and a designed table, and carry out score judgment by the investigated people.
The above embodiments are merely examples and are not intended to limit the scope of the present disclosure, which is defined by the following claims and their equivalents, which are intended to be covered by the claims in this specification and claims.
Claims (3)
1. A local traffic planning multi-scale evaluation method based on VISSIM is characterized by comprising the following steps:
inputting a traffic planning scheme of a current local area;
acquiring a traffic map of a current local area, analyzing a topological structure in the traffic map, and making judgment standards, wherein the judgment standards comprise a traffic state evaluation standard, a safety evaluation standard and an environmental protection evaluation standard;
indexes used by the traffic state evaluation standard comprise the maximum queuing length of vehicles, the parking times, delay caused by parking and the actual service level of the road, wherein the maximum queuing length of the vehicles refers to the longest queuing occurring in traffic monitoring within a preset time, the parking times refer to the average parking times of the vehicles in a traffic flow, the delay caused by parking refers to the short parking caused by the parking of the individual vehicles or the stopping time caused in a traffic scene, and the actual service level of the road refers to the actual traffic effect of the road divided into a plurality of levels;
indexes used by the safety evaluation standard comprise a speed range, the separation degree of the motor vehicle and the non-motor vehicle and traffic flow outburst points, wherein the speed range refers to speed change in an explicit speed limit range and a non-explicit speed limit range, the separation degree of the motor vehicle and the non-motor vehicle refers to traffic arrangement among the motor vehicle, the non-motor vehicle and pedestrians passing through the area, and the traffic flow outburst quantity point refers to the number of access points of traffic flow of a main road to a diversion road or a variable road range;
indexes used by the environmental protection evaluation standard comprise CO emission, NOx emission and VOC emission;
generating data input into the VISSIM simulation system;
performing analog simulation by using a VISSIM simulation system;
scoring indexes used by the traffic state evaluation standard, the safety evaluation standard and the environmental protection evaluation standard;
optimizing the traffic planning scheme of the current local area according to the scores of indexes used by the traffic state evaluation standard, the safety evaluation standard and the environmental protection evaluation standard to obtain several types of new traffic planning schemes;
investigating audience groups in the current local area, and scoring each new traffic planning scheme through the audience groups;
a new traffic planning scenario is selected.
2. The VISSIM-based local traffic planning multiscale evaluation method as recited in claim 1, wherein: and inputting the traffic planning scheme of the current local area, namely performing low-altitude remote sensing on the current local area to obtain a traffic remote sensing map.
3. The VISSIM-based local traffic planning multiscale evaluation method as recited in claim 2, wherein: the indexes used by the traffic state evaluation standard and the indexes used by the safety evaluation standard can be obtained through a traffic monitoring system arranged in the current local area, and the indexes used by the environmental protection evaluation standard are obtained through an environmental measurement sensor arranged in the current local area.
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