CN102063789A - Traffic information quality evaluation method and system - Google Patents
Traffic information quality evaluation method and system Download PDFInfo
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- CN102063789A CN102063789A CN2009102381492A CN200910238149A CN102063789A CN 102063789 A CN102063789 A CN 102063789A CN 2009102381492 A CN2009102381492 A CN 2009102381492A CN 200910238149 A CN200910238149 A CN 200910238149A CN 102063789 A CN102063789 A CN 102063789A
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Abstract
The embodiment of the invention provides a traffic information quality evaluation method and system, which can solve the problems that the prior art consumes time and labor and is very easy to cause errors. The method comprises the following steps of: acquiring information of at least two positions by a GPS (Global Positioning System) terminal and recording acquisition time corresponding to the information of the positions; determining a road section according to the information of the position; determining the average speed of the road section according to the length of the road section and the difference of starting point acquisition time and ending point acquisition time; and carrying out evaluation on issued traffic information according to the average speed. According to the embodiment of the invention, the average speed of the road section is obtained by utilizing the information of the positions and the acquisition time of actually-measured GPS points, so that accurate and effective data support is provided for evaluating the quality of the traffic information, delay is also effectively avoided, the limits and defects in the traditional evaluation technology are solved, and further the quality evaluation of the traffic information becomes a simple, reliable and scientific road measurement technology.
Description
Technical field
The present invention relates to a kind of road information assessment technology, relate in particular to a kind of transport information method for evaluating quality and device.
Background technology
The Real-time Traffic Information quality is the focus of Real-time Traffic Information issue.For a long time, the quality of Real-time Traffic Information quality often depends on the subjective judgement of people, has stronger randomness and contingency, lacks effective foundation; And the complexity of the road segment segment length of travel, category of roads and real time traffic data amount is huge numerous and disorderly, brings very big difficulty often for the assessment of transport information; Various appraisal procedure and standard also make the issue quality of transport information, lack criterion and evaluation criteria and method in the industry.
Early stage assessment technology is based on the manual detection of road driving, and the tester often on the way travels, and according to the traffic behavior on the road surface, car speed, checks simultaneously the terminal information releasing, according to people's direct sense organ, judges assessment.
This scheme mainly contains two shortcomings: artificial randomness is stronger, lacks data and supports; Whether road blocks up, and often with the rank of road, control situation and driving influence much relations is arranged, and the jam situation that is observed visually depends on subjective judgement, lacks the data foundation, assesses road conditions with these class methods, and randomness is science more greatly and not; Do not consider time-delay, the issue of Real-time Traffic Information often has the time-delay of processing, and according to different issue passage and methods, time-delay though this method is simple, directly perceived in the process of contrast, tends to ignore the influence that time-delay causes generally at 2-10 minute; If consider time-delay, then often need stay time enough at the crossing with the reply time-delay, assess effectiveness is low.
Another kind of drive test assessment technology, generally be based on particular link, by certain specific method, as camera, coil etc., obtain congestion status or other data of travel speed, road, as the speed foundation of drive test, corresponding with it real-time traffic distributing data compares, although this method has solved the low and latency issue of drive test efficient to a certain extent, also there is more negative effect, show following several aspect:
1, road is to specify road, in the vehicle driving process, can not change traffic route flexibly according to the road actual conditions;
2, in the drive test process, what read is instantaneous velocity in the vehicle autometer, and this speed can not demonstrate fully the average velocity and the hourage of road section owing to be instantaneous velocity, very easily causes estimation error;
3, the process of drive test needs abundant highway section to measure, and as the highway section of the different categories of roads of needs more than 300, like this, the highway section of the different categories of roads more than 300 is measured, and generally needs the time more than 3.5 hours; On the other hand, be calculating in 1 time/2 minutes if release news by renewal frequency, then have to surpass 100 times Data Update, the foundation of drive test then is the real time data of searching in its corresponding more new data according to by the time of rolling away from of certain way; Therefore in whole calculation process, it is comparatively loaded down with trivial details that the inquiry of real time traffic data and extraction seem.
In a word, in existing drive test assessment technology, also exist and take time and effort, and problem such as very easily make the mistake.
Summary of the invention
Embodiments of the invention provide a kind of transport information method for evaluating quality and system, can solve the problem that prior art takes time and effort and very easily makes the mistake.
Embodiments of the invention provide a kind of transport information method for evaluating quality, comprising: by at least two positional informations of GPS terminal collection, and record and the corresponding acquisition time of position positional information; Determine road segment segment according to described positional information; Determine the average velocity of this road segment segment according to the difference of the length of road segment segment and starting point acquisition time and end point acquisition time; According to described average velocity the transport information of issue is assessed.
The embodiment of the invention also provides a kind of transport information quality evaluation device, comprising: collecting unit, be used for by at least two current position information of GPS terminal collection, and record and the corresponding acquisition time of positional information; First determining unit is used for determining road segment segment according to described positional information; Second determining unit is used for determining according to the difference of the length of road segment segment and starting point acquisition time and end point acquisition time the average velocity of this road segment segment; Assessment unit is used for according to described average velocity the transport information of issue being assessed.
According to the embodiment of the invention, the positional information and the acquisition time that utilize actual measurement GPS to order, can measure the average velocity of this positional information road corresponding section, the average velocity of this average velocity and data source issue is compared, just can make assessment the transport information quality of data source.Because what the embodiment of the invention adopted is positional information and the acquisition time that actual measurement GPS is ordered, thereby, assessment transport information quality supports for providing accurate and effective data, make it to possess stronger persuasion property and dirigibility, search corresponding transport information issue batch with the time of rolling away from, also effectively avoided time-delay, solved the limitation and the deficiency of traditional assessment technology, made the transport information quality evaluation become the drive test technology of simple, reliable a, science.
Description of drawings
Fig. 1 shows the transport information method for evaluating quality of the embodiment of the invention;
Fig. 2 shows the performance situation that road in the road table of the embodiment of the invention and GPS are ordered;
Fig. 3 shows the transport information quality evaluation device of the embodiment of the invention.
Embodiment
Understand and realization the present invention the existing embodiments of the invention of describing in conjunction with the accompanying drawings for the ease of persons skilled in the art.
Embodiment one
As shown in Figure 1, present embodiment provides a kind of transport information method for evaluating quality, comprises the steps:
Longitude and latitude with the GPS that gathers is ordered is presented on the chart of road with graphics mode, make it with the road chart on same plane; Road table information comprises the topology relationship of geometric configuration, travel direction, road type (bypass or main road) and other front and back road segment segment of road segment segment; Mate according to the theodolite place at place, the continuity of travelling and road Table Properties the GPS collection point.
Measure the average velocity that the acquisition time that obtains positional information and record obtains certain highway section by GPS, make this appraisal procedure more accurate, reasonable.
For example, release news two minutes being update cycle (the even number time that is assumed to 2,4,6,8 for more new lot): the time of end point is: 17:02:01 second, then search the real time data in this highway section in the data batch of 17:04; Endtime is 17:08:00, then searches the real time data in this highway section in the data batch of corresponding 17:08;
The average velocity of average velocity of obtaining and the issue that finds is compared, promptly obtain the corresponding state in this highway section, thereby can assess the degree of reliability of the speed of issue easily; Circulation obtains the average velocity of actual measurement in each highway section and the speed of data source issue, promptly obtains the comparing result in all highway sections of drive test process; Describe the basic procedure of assessment below in detail:
1, the GPS point that mates on the road segment segment is analyzed, get temporal information that first GPS orders the time point that sails into as this road segment segment, get temporal information that last GPS orders as rolling time point away from, both get, and it is poor, as the hourage of the whole road segment segment of travelling; Removed in this time with the length in this highway section, promptly obtain average velocity, i.e. Shi Ce average velocity by this road segment segment;
2, according to the time of rolling away from, search its corresponding data source distributing data, and obtain the speed of the issue of data source on this road segment segment;
3, the speed of the average velocity of contrast actual measurement and data source issue can be assessed the transport information quality of the invention of data source.
The state that 4, also can compare road promptly, with the average velocity of actual measurement, by the issue standard, is converted to the actual measurement road condition; Data source is issued speed, be converted to the road condition of issue; To issue road condition and compare,, praise if consistent with the actual measurement road condition; If both states are inconsistent, then allow certain predetermined difference value, if surpass predetermined difference value (is 5 kilometers/hour as predetermined difference value), then think the transport information mistake of data source issue.Stagger the time when the transport information of finding the data source issue, the acquisition algorithm of transport information is proofreaied and correct.
5, on each road segment segment, repeat above-mentioned steps 1-4, promptly obtain the comparing result of all road segment segment that this drive test passes through;
Behind the comparing result that obtains above-mentioned all road segment segment, carry out mileage and the road hop count carries out statistical study according to the corresponding calculated result, simultaneously, be analyzed in conjunction with mileage that blocks up and road hop count, thereby the transport information to issue is assessed, and can adjust data source according to assessment result then.Also can generate various figures,, represent with the result who satisfies assessment as histogram, curve map and pie chart according to the statistics special topic.
Below by an example process of transport information quality evaluation is once described:
1, with the GPS point and the road table data of gathering, superpose in space plane, Fig. 2 shows road and the GPS performance situation of ordering of road in showing.
2, carry out the space coupling in conjunction with the road Table Properties, determine the path locus of drive test process, and then obtain road segment segment.
3, according to the length of road segment segment, search the GPS point at road segment segment two ends, be defined as the rising of this road segment segment, stop.
4, the mistiming of order of the GPS by terminal obtains hourage in this highway section, except that hourage, obtains the actual measurement average velocity on this highway section with the length in this highway section; Zero-time as road segment segment is: 20:45:21, and be closing time: the length of 20:46:4 road segment segment is 580 meters, and then the average velocity of this road segment segment is:
580 meters/(20:46:4-20:45:21)=the 580/43=13.51 meter per second;
Be scaled kilometer/hour: 48.64km/ hour; Be scaled traffic according to table 1: unimpeded (green);
Table 1
| Speed per hour | State |
| Smaller or equal to 20 kilometers/hour | Block up |
| Greater than 20 kilometers/hour and less than 40 kilometers/hour | Jogging |
| More than or equal to 40 kilometers/hour | Unimpeded |
5, obtained the actual measurement speed in this highway section, find again roll away from time data source, time 20:46:4 place issue batch, can navigate to the more new lot of this real time data, in this batch, find the average velocity of this road segment segment of issue, the average velocity of issue is converted to the traffic behavior of road, two states and speed are compared and calculate, thereby obtain the correctness whether judgement in this highway section;
6, circulation above-mentioned steps 1-5 obtains the actual measurement speed of other road segment segment in this drive test process and the corresponding state of issue speed;
7, with all comparing results, carry out statistical study, promptly obtain all assessment results of this drive test.
Embodiment two
As shown in Figure 3, present embodiment provides a kind of transport information quality evaluation device, comprising: collecting unit, be used for by at least two positional informations of GPS terminal collection, and record and the corresponding acquisition time of positional information; First determining unit is used for determining road segment segment according to described positional information; Second determining unit is used for determining according to the difference of the length of road segment segment and starting point acquisition time and end point acquisition time the average velocity of this road segment segment; Assessment unit is used for according to described average velocity the transport information of issue being assessed.Described device also comprises correcting unit, is used for staggering the time when the transport information of finding the data source issue, and the acquisition algorithm of transport information is proofreaied and correct.
Described first determining unit comprises matching unit: be used for carrying out the space coupling by positional information and road table map and obtain road segment segment.
According to the embodiment of the invention, the positional information and the acquisition time that utilize actual measurement GPS to order, can measure the average velocity of this positional information road corresponding section, the average velocity of this average velocity and data source issue is compared, just can make assessment the transport information quality of data source.Because what the embodiment of the invention adopted is positional information and the acquisition time that actual measurement GPS is ordered, thereby, assessment transport information quality supports for providing accurate and effective data, make it to possess stronger persuasion property, and possessed the stronger high degree of flexibility that can choose at random measurement circuit according to the drive test situation, search corresponding transport information issue batch with the time of rolling away from, also effectively avoided time-delay to consider, solved the limitation and the deficiency of traditional assessment technology, made the transport information quality evaluation become the drive test technology of simple, reliable a, science.
Though described the present invention by embodiment, those of ordinary skills know, without departing from the spirit and substance in the present invention, just can make the present invention that many distortion and variation are arranged, and scope of the present invention is limited to the appended claims.
Claims (7)
1. a transport information method for evaluating quality is characterized in that, comprising:
By at least two positional informations of GPS terminal collection, and record and the corresponding acquisition time of position positional information;
Determine road segment segment according to described positional information;
Determine the average velocity of this road segment segment according to the difference of the length of road segment segment and starting point acquisition time and end point acquisition time;
According to described average velocity the transport information of issue is assessed.
2. method according to claim 1, it is characterized in that, carry out described according to described average velocity the transport information quality of issue is carried out appraisal procedure after, execution in step also: stagger the time when the transport information of finding the data source issue, the acquisition algorithm of transport information is proofreaied and correct.
3. method according to claim 1 and 2 is characterized in that, describedly determines that according to described positional information road segment segment is specially: carry out the space coupling by positional information and road table map and obtain road segment segment.
4. method according to claim 1 and 2, it is characterized in that, the described transport information of issue the assessment according to described average velocity is specially: according to the time of end point, search traffic information data in the corresponding issue batch, and the transport information of issue is assessed according to described average velocity.
5. a transport information quality evaluation device is characterized in that, comprising:
Collecting unit is used for by two current position information of GPS terminal collection at least, and record and the corresponding acquisition time of positional information;
First determining unit is used for determining road segment segment according to described positional information;
Second determining unit is used for determining according to the difference of the length of road segment segment and starting point acquisition time and end point acquisition time the average velocity of this road segment segment;
Assessment unit is used for according to described average velocity the transport information of issue being assessed.
6. device according to claim 5 is characterized in that described device also comprises correcting unit, is used for staggering the time when the transport information of finding the data source issue, and the acquisition algorithm of transport information is proofreaied and correct.
7. according to claim 5 or 6 described devices, it is characterized in that described first determining unit comprises matching unit: be used for carrying out the space coupling and obtain road segment segment by collection position information and road table map.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102496273A (en) * | 2011-11-22 | 2012-06-13 | 安科智慧城市技术（中国）有限公司 | City traffic road condition collection method and system thereof |
| CN103810854A (en) * | 2014-03-03 | 2014-05-21 | 北京工业大学 | Intelligent traffic algorithm evaluation method based on manual calibration |
| CN106157608A (en) * | 2015-03-23 | 2016-11-23 | 高德软件有限公司 | Information processing method and device |
| CN108877211A (en) * | 2017-05-15 | 2018-11-23 | 杭州远眺科技有限公司 | A kind of link travel speed calculation method based on sparse GPS data |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1154389B1 (en) * | 2000-05-10 | 2004-06-02 | DaimlerChrysler AG | Method to determine the traffic situation in a road network |
| CN1710624A (en) * | 2005-06-02 | 2005-12-21 | 上海交通大学 | Method for obtaining average speed of city rode traffic low region |
| CN101246513A (en) * | 2008-03-20 | 2008-08-20 | 天津市市政工程设计研究院 | City fast road intercommunicated overpass simulation design system and selection method |
| CN101286270A (en) * | 2008-05-26 | 2008-10-15 | 北京捷讯畅达科技发展有限公司 | Traffic flow forecasting method combining dynamic real time traffic data |
| CN101373559A (en) * | 2007-08-24 | 2009-02-25 | 同济大学 | Method for evaluating city road net traffic state based on floating vehicle data |
| JP2009193212A (en) * | 2008-02-13 | 2009-08-27 | Toshiba Corp | Road traffic information system |
-
2009
- 2009-11-16 CN CN200910238149.2A patent/CN102063789B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1154389B1 (en) * | 2000-05-10 | 2004-06-02 | DaimlerChrysler AG | Method to determine the traffic situation in a road network |
| CN1710624A (en) * | 2005-06-02 | 2005-12-21 | 上海交通大学 | Method for obtaining average speed of city rode traffic low region |
| CN101373559A (en) * | 2007-08-24 | 2009-02-25 | 同济大学 | Method for evaluating city road net traffic state based on floating vehicle data |
| JP2009193212A (en) * | 2008-02-13 | 2009-08-27 | Toshiba Corp | Road traffic information system |
| CN101246513A (en) * | 2008-03-20 | 2008-08-20 | 天津市市政工程设计研究院 | City fast road intercommunicated overpass simulation design system and selection method |
| CN101286270A (en) * | 2008-05-26 | 2008-10-15 | 北京捷讯畅达科技发展有限公司 | Traffic flow forecasting method combining dynamic real time traffic data |
Non-Patent Citations (1)
| Title |
|---|
| 李梅红等: "基于GPS浮动车的城市主干道交通服务水平实时评估模型", 《交通运输工程与信息学报》 * |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102496273A (en) * | 2011-11-22 | 2012-06-13 | 安科智慧城市技术（中国）有限公司 | City traffic road condition collection method and system thereof |
| CN102496273B (en) * | 2011-11-22 | 2013-12-04 | 安科智慧城市技术（中国）有限公司 | City traffic road condition collection method and system thereof |
| CN103810854A (en) * | 2014-03-03 | 2014-05-21 | 北京工业大学 | Intelligent traffic algorithm evaluation method based on manual calibration |
| CN103810854B (en) * | 2014-03-03 | 2016-04-06 | 北京工业大学 | A kind of based on the artificial intelligent transportation parameter detection method demarcated |
| CN106157608A (en) * | 2015-03-23 | 2016-11-23 | 高德软件有限公司 | Information processing method and device |
| CN106157608B (en) * | 2015-03-23 | 2019-09-13 | 高德软件有限公司 | Information processing method and device |
| CN108877211A (en) * | 2017-05-15 | 2018-11-23 | 杭州远眺科技有限公司 | A kind of link travel speed calculation method based on sparse GPS data |
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