CN101866550A - Road traffic emulation technique method based on service level - Google Patents
Road traffic emulation technique method based on service level Download PDFInfo
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Abstract
The invention relates to a road traffic emulation technique method based on sevice level, in which macro traffic situation index is revealed and converted to micro traffic situation index; a traffic planning tool is utilized to simulate traffic data; verification and parameter optimization are carried out on the traffic service level evaluation model by utilizing the results from simulation; and the traffic management scheme is evaluated. The invention combines road simulation with traffic service level evaluation so as to enable the traffic running state to be handled and stimulated more comprehensively and rectify integral macro information from micro information, thus providing more meticulous and accurate traffic analysis means for the designation of traffic management control schemes.
Description
Technical field
The invention belongs to the microcosmic reproduction of urban road system and the technical field of performance evaluation, particularly a kind of emulation technique method towards traffic administration.
Background technology
Since road traffic system emulation was the sixties in 20th century, the employing computer digit model that grows up along with improvement of computer science reflected the traffic analysis technology and the method for complicated road traffic phenomenon.From the test angle, road traffic emulation is the analogue technique of reproducing traffic flow time and spatial variations.It utilize computing machine to the structure of institute's research object (traffic system), function, behavior and participate in traffic the effector---people's thought process and behavioural characteristic are imitated comparatively really.The traffic simulation technology has intuitively, accurate, flexible characteristic, is a kind of effective means of describing complicated road traffic phenomenon.
Along with computer technology rapid development, utilize computer emulation method research road traffic problem to become one of main method of international project circle.Usual way is the road (through street, major trunk roads etc.) based on reality, the utilization emulation technology is simulated its traffic flow modes, (block up by importing the current state that different data obtain under the multiple situation, block up, unimpeded etc.), can not be to the horizontal evaluation model of transport services be verified and parameter optimization.
Summary of the invention
Deficiency at the prior art existence, the present invention proposes road traffic emulation technique method based on service level, this method combines road simulation with the road service level evaluation, make it more fully to hold and simulate the traffic circulation state, and can simulate the operation conditions of microcosmic point traffic flow by emulation tool, analyze the weak point of microscopic information, proofread and correct integral macroscopic information from microscopic information, for the appointment of traffic administration controlling schemes provides more careful, traffic analysis means accurately are from providing many-sided foundation for management decision and technology decision-making.
This method is carried out emulation to traffic data in the traffic programme instrument, it is characterized in that, employed traffic data is that the index by middle macroscopical traffic situation represents the microcosmic traffic situation index that is transformed into, and the result who uses emulation to obtain verifies with parameter optimization and to the traffic administration scheme the horizontal evaluation model of transport services and estimates.
Present instruments such as traffic programme simulation software are more, use these ripe simulation software instruments to help to improve the accuracy of this method.
The result who uses emulation to obtain verifies and parameter optimization the horizontal evaluation model of transport services, the steps include:
1) by historical data of gathering, makes up the horizontal evaluation model of transport services;
2) use the horizontal evaluation model of transport services that the actual traffic situation is estimated and obtain the service level value;
3) analogue system is carried out modeling, and obtain simulation result;
4) simulation result is advanced judge, thereby obtain the service level evaluation result in regional highway section;
5) verify check service level evaluation result with simulation result;
6) turn back to check figure certificate in the service level evaluation model, modification model if the result is unreasonable.
Based on the relation between traffic flow and the service level grade, can verify whether evaluation method is accurate, whether the result of evaluation conforms to the service level grade.If do not conform to, then there is certain limitation in the method for explanation evaluation.Whether can also verification algorithm accurate, whether this type of algorithm can be applicable to different situations.Simultaneously, can also proofread the fiduciary level of total system model construction scheme, whether the parameter optimization configuration of system is reasonable, and crucial effects (as shown in Figure 2) is played in this judgement for the service level grade of total system.By improvement as above, the further reliability of enhanced system and accuracy.
The result who uses emulation to obtain estimates the traffic administration scheme, the steps include:
1) according to different traffic administration schemes simulation parameter is set;
2) carry out emulation, obtain each highway section and crossing service level grade under different traffic administration schemes;
3) according to simulation result the traffic administration scheme is adjusted.
With the traffic behavior of actual traffic amount data reproduction real roads, can judge the quality of different traffic administration schemes with this.For the Managed Solution that adopts in the reality provides science, reliable foundation.
In addition, in the investigation of reality, based on the restriction of objective condition, the quantity of information of collection usually may not be very perfect.By the actual data of obtaining, we find that traffic detecting device on the through street under the situation of work, often can't all note each traffic flow data constantly.Not only can simulate the data of omission by the means of emulation, and can access the data message that in actual acquisition, can not obtain, thereby can simulate the traffic under the different situations.By the judge personnel it is carried out subjectivity marking again, finally obtain the service level grade classification under the different situations of target highway section.Analyze the relation that obtains between original traffic flow data and its service level grade thus.As shown in Figure 3.
Description of drawings
Fig. 1 uses the present invention to carry out the horizontal model system checking of transport services process flow diagram
Fig. 2 uses the present invention to carry out the horizontal model system checking of transport services schematic diagram
Fig. 3 traffic flow data of the present invention and service level grade evaluation concern synoptic diagram
Many granularities of the regional traffic model that adopts in Fig. 4 embodiment of the invention
Emulation technology process flow diagram in Fig. 5 embodiment of the invention
Embodiment
Below by specific embodiment the method for the invention is further specified.
Present embodiment adopts many granularities model as shown in Figure 4, on this model based, represents from the index of macroscopical traffic situation and to be transformed into microcosmic traffic situation, reappears thereby with emulation tool road conditions are carried out in concrete highway section.By to the analysis in concrete highway section portrayal, the traffic situation that pushes away followingly that can be further, and propose correspondingly traffic programme and the evaluation and the prioritization scheme of management.
Wherein, the basic data part is provided support by the existing project of Beijing Public Security Department (hereinafter to be referred as Traffic Administration Bureau); Highway section, the basis all road of layer divided the division methods with reference to the existing project of Traffic Administration Bureau; The squadron layer is divided to be divided into the basis with the subregion administration, in conjunction with Beijing's actual traffic state influence relation, each squadron's layer subregion is carried out the border delimit, realize from microstructure layer to see the mapping of layer; Detachment's layer is then divided in strict accordance with administrative relation.Its flow process as shown in Figure 5
Multi-granularity analysis evaluation model according to regional traffic service level obtains the regional traffic service level result.
Based on evaluation model the actual traffic situation is given a mark.
Utilize emulation tool that the running status real simulated in certain concrete bar highway section is come out then.At this, what we used is the CUBE transportation planning software of U.S. Citilabs company, and it is one of most popular software in traffic programme field.
Simulation result is responsible for judge, thereby obtains the service level evaluation result in regional highway section, verify with this simulation result and check the service level evaluation result, turn back to check figure certificate in the service level evaluation model if the result is unreasonable, revise model.
Be different from emulation technology in the past, only recognize macroscopical area information, also can simulate all situations of microcosmic road section information.Again from bottom to up, obtain service level evaluation result at all levels, finally provide macroscopic view support for administrative authority's decision-making.
Claims (3)
1. based on the road traffic emulation technique method of service level, in the traffic programme instrument, traffic data is carried out emulation, it is characterized in that, employed traffic data is that the index by middle macroscopical traffic situation represents the microcosmic traffic situation index that is transformed into, and the result who uses emulation to obtain verifies with parameter optimization and to the traffic administration scheme the horizontal evaluation model of transport services and estimates.
2. the road traffic emulation technique method based on service level as claimed in claim 1 is characterized in that, the result that described use emulation obtains verifies and parameter optimization the horizontal evaluation model of transport services, the steps include:
1) by historical data of gathering, makes up the horizontal evaluation model of transport services;
2) use the horizontal evaluation model of transport services that the actual traffic situation is estimated and obtain the service level value;
3) analogue system is carried out modeling, and obtain simulation result;
4) simulation result is advanced judge, thereby obtain the service level evaluation result in regional highway section;
5) verify check service level evaluation result with simulation result;
6) turn back to check figure certificate in the service level evaluation model, modification model if the result is unreasonable.
3. the road traffic emulation technique method based on service level as claimed in claim 1 is characterized in that, the result that described use emulation obtains estimates the traffic administration scheme, the steps include:
1) according to different traffic administration schemes simulation parameter is set;
2) carry out emulation, obtain each highway section and crossing service level grade under different traffic administration schemes;
3) according to simulation result the traffic administration scheme is adjusted.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102609781A (en) * | 2011-12-15 | 2012-07-25 | 东南大学 | Road traffic predication system and method based on OD (Origin Destination) updating |
| CN103761138A (en) * | 2014-01-16 | 2014-04-30 | 昆明理工大学 | Parameter correction method for traffic simulation software |
| CN104851283A (en) * | 2015-05-14 | 2015-08-19 | 陆化普 | Method and apparatus of automatic generation of urban transport strategy planning scheme |
| CN107067727A (en) * | 2017-06-07 | 2017-08-18 | 浙江工业大学 | A kind of road traffic service level evaluation method based on fuzzy KNN characteristic matchings |
-
2009
- 2009-04-14 CN CN200910081854A patent/CN101866550A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102609781A (en) * | 2011-12-15 | 2012-07-25 | 东南大学 | Road traffic predication system and method based on OD (Origin Destination) updating |
| CN103761138A (en) * | 2014-01-16 | 2014-04-30 | 昆明理工大学 | Parameter correction method for traffic simulation software |
| CN103761138B (en) * | 2014-01-16 | 2017-01-18 | 昆明理工大学 | Parameter correction method for traffic simulation software |
| CN104851283A (en) * | 2015-05-14 | 2015-08-19 | 陆化普 | Method and apparatus of automatic generation of urban transport strategy planning scheme |
| CN107067727A (en) * | 2017-06-07 | 2017-08-18 | 浙江工业大学 | A kind of road traffic service level evaluation method based on fuzzy KNN characteristic matchings |
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Application publication date: 20101020 |