CN101908276A - Method and device for evaluating traffic information - Google Patents
Method and device for evaluating traffic information Download PDFInfo
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- CN101908276A CN101908276A CN 201010241103 CN201010241103A CN101908276A CN 101908276 A CN101908276 A CN 101908276A CN 201010241103 CN201010241103 CN 201010241103 CN 201010241103 A CN201010241103 A CN 201010241103A CN 101908276 A CN101908276 A CN 101908276A
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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
Abstract
The embodiment of the invention discloses method and device for evaluating traffic information, which relates to the field of traffic information application and solves the technical problem of poorer reliability of the traffic information referenced by a user in the prior art. The method of the embodiment of the invention mainly comprises the following steps of: testing a tested road section through road testing track equipment to obtain sample track data of the tested road section; processing the sample track data according to a road testing standard computing mode to obtain standard answer road condition information; and according to the standard answer road condition information, evaluating the accuracy of the road condition information obtained by a traffic system according to real-time dynamic traffic flow information. The embodiment of the invention is mainly applied to evaluating the traffic information and providing traffic information service.
Description
Technical field
The present invention relates to the transport information application, relate in particular to a kind of method and device of evaluating traffic information.
Background technology
Living standards of the people improve constantly at present, and road traffic is constantly expanded, but because the rapid growth of vehicle, flow, traffic conflict is also very outstanding, and in order to guarantee transit time, people are also more and more higher to the concern of road conditions.Therefore, intelligent transportation system operation and giving birth to, this intelligent transportation system can be pointed out the current road conditions traffic information etc. that whether blocks up for the user according to detected real-time dynamic traffic stream information.
But along with the growth of transport need, the reliability of the traffic information that obtains according to the real-time dynamic traffic stream information also seems particularly important.If the user with reference to inaccurate traffic information, not only bad for trip, even also can influence traffic administration in driving procedure, cause traffic congestion, traffic hazard etc.
Summary of the invention
Embodiments of the invention provide a kind of method and device of evaluating traffic information, improve the reliability of traffic information by the mode that information on services is provided, and availability is strong, can bring good experience for the user.
For achieving the above object, embodiments of the invention adopt following technical scheme:
A kind of method of evaluating traffic information comprises:
Thereby test segment is tested the sample track data that obtains described test segment by drive test route equipment;
Thereby according to drive test criterion calculation mode described sample track data is handled and to be obtained the model answer traffic information;
Estimate the accuracy of the traffic information that traffic system obtains according to the real-time dynamic traffic stream information according to described model answer traffic information.
A kind of device of evaluating traffic information comprises:
Sample track acquiring unit, thus be used for test segment being tested the sample track data that obtains described test segment by drive test route equipment;
The model answer processing unit obtains the model answer traffic information thereby be used for according to drive test criterion calculation mode described sample track data being handled;
Evaluation unit is used for estimating according to described model answer traffic information the accuracy of the traffic information that traffic system obtains according to the real-time dynamic traffic stream information.
Technical scheme provided by the invention has following beneficial effect: thus according to drive test criterion calculation mode the sample track data that gets access to is handled the model answer traffic information that obtains test segment, can increase the accuracy of this model answer traffic information, according to this model answer traffic information the traffic information that traffic system draws is done evaluation again, thereby get the reliability of the traffic information of determining that this traffic system provides, can avoid user's inaccurate traffic information of reference in driving procedure, can reduce influence to traffic administration, and this evaluation result is actually a kind of information on services that vehicle supervision department or operator provide for the user, being convenient to the user obtains, availability is strong, can bring good experience for the user.
Description of drawings
In order to be illustrated more clearly in the embodiment of the invention or technical scheme of the prior art, to do to introduce simply to the accompanying drawing of required use in embodiment or the description of the Prior Art below, apparently, accompanying drawing in describing below only is some embodiments of the present invention, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain other accompanying drawing according to these accompanying drawings.
Fig. 1 is the method synoptic diagram of evaluating traffic information in the embodiment of the invention 1;
Fig. 2 is the method flow diagram of evaluating traffic information in the embodiment of the invention 1;
Fig. 3 is a synoptic diagram of waiting for the traffic lights zone in the embodiment of the invention 1;
Fig. 4 is for obtaining the method flow diagram of model answer traffic information in the embodiment of the invention 1;
Fig. 5 cut and chooses synoptic diagram for the time in the embodiment of the invention 1;
Fig. 6 is the apparatus structure synoptic diagram of evaluating traffic information in the embodiment of the invention 2.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the invention, the technical scheme in the embodiment of the invention is clearly and completely described, obviously, described embodiment only is the present invention's part embodiment, rather than whole embodiment.Based on the embodiment among the present invention, those of ordinary skills belong to the scope of protection of the invention not making the every other embodiment that is obtained under the creative work prerequisite.And, below each embodiment be possibility of the present invention, embodiment put in order and the numbering execution sequence preferred of embodiment with it irrelevant.
Present embodiment will provide a kind of method of evaluating traffic information in conjunction with synoptic diagram 1, and as shown in Figure 2, this method comprises:
Particularly, when testing vehicle enters the test segment of planning, open drive test route equipment, drive test route equipment is target with this testing vehicle, tracing point when writing down per moment testing vehicle and on test segment, travelling, each tracing point all has the tracing point data of this tracing point, is: the sample track data, it comprises certain information such as speed of some positions vehicle to be measured constantly, gathers with this and obtains testing vehicle in the speed of a motor vehicle of certain certain locus constantly on the spot.For example: at 8: 02, coordinate was that (X1, on position Y1), car speed is V1 kilometer/hour etc.In addition, when testing vehicle enters non-test segment, need in time close drive test route equipment, get back to test segment and then need in time to open drive test route equipment.
Preferential, above-mentioned drive test route equipment preferably possesses the function that can write down high frequency trajectory point (point of per second record).Can get access to unencrypted high frequency samples tracing point data as DG100; Trimble PDA can get access to the high frequency samples tracing point data of encryption.
Need to prove: in the process of obtaining the model answer traffic information, also need to wait for the traffic lights time when waiting for that traffic lights time rule and sample track data obtain by described test segment.
Wherein, wait for that the traffic lights time rule is specially: on high speed, through street, do not have traffic lights equipment, need not to consider to wait for the traffic lights time, wait for that promptly the traffic lights time is 0; The execution traffic lights deduction principle of other roads comprises following content:
Think in 1/3 scope from the test segment crossing to road section length the traffic lights waiting area (when road section length 1/3 greater than 200 meters, think the traffic lights waiting area with 200 meters; When road section length 1/3 less than 50 meters, think the traffic lights waiting area with 50 meters), need the GPS point time relatively more crowded in this zone of deduction, when several heaps GPS point that crowds is arranged in this zone, deduct that heap point time nearest from the crossing.
To waiting for the traffic lights time specifically for instance when waiting for that traffic lights time rule and sample track data obtain by described test segment, as shown in Figure 3, in the sample track data of drive test route equipment records, the time that comprises each time point testing vehicle, position coordinates, and speed, knowing the length of waiting area start-stop position tracing point N1 according to wait traffic lights time rule to N2.Therefore know the time point of tracing point N1 and tracing point N2, the mistiming of this N1 time point and N2 time point, be the wait traffic lights time in the traffic lights waiting area.Wherein, M representative test link length, M represents the traffic lights waiting area;
Preferably, as shown in Figure 4, obtain the concrete manner of execution of model answer traffic information and be thereby according to drive test criterion calculation mode described sample track data is handled described in the step 102:
401, the travel speed when obtaining by described test segment according to the length of test segment and the running time by described test segment, promptly following formula:
Wherein, described running time is: the journey time in the described sample track data is poor with the time wait traffic lights time by described test segment;
For example: as shown in Figure 1, basic data is actually basic map, according to location tables (this location tables is specially the RTIC form in the present embodiment) and basic map, can search test segment in basic map, thereby knows the length of test segment.Again according to the journey time in the sample track data, and above-mentioned according to waiting for that the wait traffic lights time that the traffic lights time rule draws can draw running time, and can calculate travel speed by above-mentioned formula.Wherein, journey time can be poor to by the time point behind the test segment of the time point at the test segment crossing in the sample track data.
402, sign according to described travel speed and corresponding described test segment, in the congestion in road rule, search corresponding model answer traffic information, wherein, in described congestion in road rule, include according to the traffic information of different travel speeds with the corresponding definition of the sign of test segment.
Above-mentioned congestion in road rule can be shown in following table one:
Table one
Wherein, RTIC_Level is equivalent to the sign of test segment.Because in basic map or in the location tables of RTIC form, each highway section is all with sign, therefore when practical application, also sign during traffic system identification test segment by this highway section, and setting up standard of this highway section sign also is provided with the conformance to standard of sign with traffic system, in the time of can guaranteeing that so follow-up model answer traffic information by test segment is estimated the traffic information that traffic system provides, what both indicated is same highway section, and then guarantees that both compare to the locational traffic information of the same space.
For instance, if test segment is main roads (RTIC_Leve is 3), running velocity is 30, table in the reference, and the model answer traffic information of these main roads is unimpeded at present as can be known.
It is consistent on the locus that foregoing has been mentioned the traffic information that sign by test segment can guarantee that model answer traffic information and traffic system provide, in addition, need also to guarantee that the traffic information that model answer traffic information and traffic system provide is consistent on time location, guarantee that promptly the traffic information that model answer traffic information and traffic system provide all is same highway sections, traffic information in the same time period, this just has comparability, also can guarantee the accuracy of evaluation result simultaneously.Can realize in the following way: choose with synchronous time of described traffic system according to the time cut rule and cut.
Because the traffic information in the traffic system cuts according to the time and transmits, promptly transmit traffic information in this interval time every the regular hour, so, can guarantee consistent on time location of traffic information that model answer traffic information and traffic system provide so if above-mentioned model answer traffic information also cuts according to the time identical with traffic system and transmits.
Above-mentioned time cut rule is specific as follows:
Principle 1: in the method for present embodiment, the timestamp of generation was with 00 minute, 05 minute ... and the like standard time stab, expression be preceding 5 minutes traffic information;
Principle 2: just in time comprised when the entry time and the post-set time of testing vehicle, then just generate the timestamp of this standard time scope by a standard time scope;
Principle 3: when the entry time of testing vehicle with cross over a standard time post-set time and stab, select so to be cut apart that many timestamp of back time by this timestamp;
Principle 4: when the entry time of testing vehicle with cross over 2 standard time post-set time and stab, select complete that timestamp that comprises the standard time scope so;
Principle 5: when the entry time of testing vehicle with cross over 3 or 3 above standard time post-set time and stab, select so one and post-set time immediate complete that timestamp that comprises the standard time scope;
For instance, with reference to following table two
Table two
Or, with reference to Fig. 5, Fig. 5 represent testing vehicle pass through a test segment cut 2 times in the time synoptic diagram and testing vehicle by the synoptic diagram of a test segment when cutting greater than 2 times.Wherein, Node1---Node2: the highway section that the location tables of corresponding one section RTIC form is chosen, Node2---Node3 ... .. is in like manner; EPOCH: clock time was cut in 5 minutes in the present embodiment; The Avg representative: after formula one calculating, the model answer traffic information that draws.
Particularly, step 103 implementation is: at identical timestamp, described traffic system is compared according to traffic information and the model answer traffic information that the real-time dynamic traffic stream information obtains, wherein, the indicated highway section of the traffic information that obtains of described traffic system is corresponding with described test segment;
If the described traffic information that obtains is identical with described model answer traffic information, then estimate traffic information that described traffic system obtains according to the real-time dynamic traffic stream information for accurately; Otherwise it is inaccurate estimating the traffic information that described traffic system obtains according to the real-time dynamic traffic stream information.
For example: test segment is main roads (these test segments in traffic system be designated 3), and when cutting in the 08:05 time, the model answer traffic information is to block up; Correspondingly, when the highway section that the traffic system correspondence is designated 3 (what be designated 3 highway sections in traffic system is main roads) was cut in the 08:05 time, the traffic information that obtains according to the real-time dynamic traffic stream information is slow, therefore, it is inaccurate estimating the traffic information that this traffic system obtains according to the real-time dynamic traffic stream information, or mistake.
The method that provides by present embodiment, can carry out reliable, believable evaluation to the traffic information that obtains according to the real-time dynamic traffic stream information, can avoid user's inaccurate traffic information of reference in driving procedure, can reduce influence to traffic administration, and can reduce the manually-operated amount of whole evaluation procedure effectively, improve valency efficient, availability is strong, the traffic information that traffic system is provided has reliability, for the user brings good experience.
Embodiment 2
Present embodiment provides a kind of device of evaluating traffic information, and as shown in Figure 6, this device comprises: sample track acquiring unit 61, model answer processing unit 62, evaluation unit 63.
Sample track acquiring unit 61, thus be used for test segment being tested the sample track data that obtains described test segment by drive test route equipment; Model answer processing unit 62 obtains the model answer traffic information thereby be used for according to drive test criterion calculation mode described sample track data being handled; Evaluation unit 63 is used for estimating according to described model answer traffic information the accuracy of the traffic information that traffic system obtains according to the real-time dynamic traffic stream information.
Wherein, model answer processing unit 62 comprises: criterion calculation module 621, model answer acquisition module 622.
Criterion calculation module 621, travel speed when being used for obtaining by described test segment according to the length of test segment and the running time by described test segment, wherein said running time is: wait traffic lights time poor with by described test segment time of the journey time in the described sample track data;
Model answer acquisition module 622, be used for sign according to described travel speed and corresponding described test segment, in the congestion in road rule, search corresponding model answer traffic information, wherein, in described congestion in road rule, include according to the traffic information of different travel speeds with the corresponding definition of the sign of test segment.
Evaluation unit 63 comprises: comparison module 631, evaluation module 632.
Comparison module 631, be used at identical timestamp, described traffic system is compared according to traffic information and the model answer traffic information that the real-time dynamic traffic stream information obtains, and wherein, the indicated highway section of the traffic information that described traffic system is obtained is corresponding with described test segment;
Evaluation module 632 if it is identical with described model answer traffic information to be used for the described traffic information that obtains, is then estimated traffic information that described traffic system obtains according to the real-time dynamic traffic stream information for accurately; Otherwise it is inaccurate estimating the traffic information that described traffic system obtains according to the real-time dynamic traffic stream information.
In the present embodiment, this device also can comprise: wait for traffic lights time acquisition unit 64, choose unit 65.
Wait for traffic lights time acquisition unit 64, be used for waiting for the traffic lights time when waiting for that traffic lights time rule and sample track data obtain by described test segment;
Choose unit 65, be used for choosing with synchronous time of described traffic system and cut according to the time cut rule.
The device that present embodiment provides can be estimated the traffic information that traffic system provides according to the model answer traffic information, determine the accuracy of traffic system traffic information, be convenient to the user and adopt reliable traffic information in the process of moving, and this device can think that the user provides transport services information to provide service for the user by being applied in traffic control department or carrier side, being convenient to the user obtains, availability is strong, can bring good experience for the user.
Through the above description of the embodiments, the those skilled in the art can be well understood to the present invention and can realize by the mode that software adds essential general hardware platform, can certainly pass through hardware, but the former is better embodiment under a lot of situation.Based on such understanding, the part that technical scheme of the present invention contributes to prior art in essence in other words can embody with the form of software product, this computer software product is stored in the storage medium that can read, floppy disk as computing machine, hard disk or CD etc. comprise that some instructions are with so that equipment or system carry out the described method of each embodiment of the present invention.
The above; only be the specific embodiment of the present invention, but protection scope of the present invention is not limited thereto, anyly is familiar with those skilled in the art in the technical scope that the present invention discloses; can expect easily changing or replacing, all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion by described protection domain with claim.
Claims (10)
1. the method for an evaluating traffic information is characterized in that, comprising:
Thereby test segment is tested the sample track data that obtains described test segment by drive test route equipment;
Thereby according to drive test criterion calculation mode described sample track data is handled and to be obtained the model answer traffic information;
Estimate the accuracy of the traffic information that traffic system obtains according to the real-time dynamic traffic stream information according to described model answer traffic information.
2. method according to claim 1, it is characterized in that, after obtaining the sample track data of described test segment, this method also comprises: wait for the traffic lights time when waiting for that traffic lights time rule and sample track data obtain by described test segment.
3. method according to claim 2 is characterized in that, thereby described described sample track data the processing according to drive test criterion calculation mode obtained the model answer traffic information and be specially:
Travel speed when obtaining by described test segment according to the length of test segment and the running time by described test segment, wherein said running time is: wait traffic lights time poor with by described test segment time of the journey time in the described sample track data;
Sign according to described travel speed and corresponding described test segment, in the congestion in road rule, search corresponding model answer traffic information, wherein, in described congestion in road rule, include according to the traffic information of different travel speeds with the corresponding definition of the sign of test segment.
4. method according to claim 1 is characterized in that, after obtaining the sample track data of described test segment, this method also comprises: choose with synchronous time of described traffic system according to the time cut rule and cut.
5. method according to claim 4 is characterized in that, the described accuracy of estimating the traffic information that traffic system obtains according to the real-time dynamic traffic stream information according to described model answer traffic information is specially:
At identical timestamp, described traffic system is compared according to traffic information and the model answer traffic information that the real-time dynamic traffic stream information obtains, wherein, the indicated highway section of the traffic information that described traffic system is obtained is corresponding with described test segment;
If the described traffic information that obtains is identical with described model answer traffic information, then estimate traffic information that described traffic system obtains according to the real-time dynamic traffic stream information for accurately; Otherwise it is inaccurate estimating the traffic information that described traffic system obtains according to the real-time dynamic traffic stream information.
6. the device of an evaluating traffic information is characterized in that, comprising:
Sample track acquiring unit, thus be used for test segment being tested the sample track data that obtains described test segment by drive test route equipment;
The model answer processing unit obtains the model answer traffic information thereby be used for according to drive test criterion calculation mode described sample track data being handled;
Evaluation unit is used for estimating according to described model answer traffic information the accuracy of the traffic information that traffic system obtains according to the real-time dynamic traffic stream information.
7. device according to claim 6 is characterized in that, this device also comprises:
Wait for the traffic lights time acquisition unit, be used for waiting for the traffic lights time when waiting for that traffic lights time rule and sample track data obtain by described test segment.
8. device according to claim 7 is characterized in that, described model answer processing unit comprises:
Criterion calculation module, travel speed when being used for obtaining by described test segment according to the length of test segment and the running time by described test segment, wherein said running time is: wait traffic lights time poor with by described test segment time of the journey time in the described sample track data;
The model answer acquisition module, be used for sign according to described travel speed and corresponding described test segment, in the congestion in road rule, search corresponding model answer traffic information, wherein, in described congestion in road rule, include according to the traffic information of different travel speeds with the corresponding definition of the sign of test segment.
9. device according to claim 6 is characterized in that, this device also comprises:
Choose the unit, be used for choosing with synchronous time of described traffic system and cut according to the time cut rule.
10. the device characteristic according to claim 9 is, described evaluation unit comprises:
Comparison module, be used at identical timestamp, described traffic system is compared according to traffic information and the model answer traffic information that the real-time dynamic traffic stream information obtains, and wherein, the indicated highway section of the traffic information that described traffic system is obtained is corresponding with described test segment;
Evaluation module if it is identical with described model answer traffic information to be used for the described traffic information that obtains, is then estimated traffic information that described traffic system obtains according to the real-time dynamic traffic stream information for accurately; Otherwise it is inaccurate estimating the traffic information that described traffic system obtains according to the real-time dynamic traffic stream information.
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| PCT/CN2011/073682 WO2012013056A1 (en) | 2010-07-29 | 2011-05-05 | Traffic information evaluation method and device thereof |
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| CN108847042B (en) * | 2018-08-24 | 2021-04-02 | 讯飞智元信息科技有限公司 | Road condition information publishing method and device |
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