CN100541553C - Road traffic accident data acquisition and processing (DAP) method - Google Patents
Road traffic accident data acquisition and processing (DAP) method Download PDFInfo
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- CN100541553C CN100541553C CNB2007101902239A CN200710190223A CN100541553C CN 100541553 C CN100541553 C CN 100541553C CN B2007101902239 A CNB2007101902239 A CN B2007101902239A CN 200710190223 A CN200710190223 A CN 200710190223A CN 100541553 C CN100541553 C CN 100541553C
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Abstract
Road traffic accident information acquisition and disposal route relate to after road traffic accident takes place, according to the traffic accident event information, determine that traffic control, signal controlling, information the quick Disposal Measures practical range of traffic such as induces, calculate the queue length L that the traffic accident incident causes traffic congestion, the queue length overlay area is called the scope of blocking up; The scope of will blocking up and shunt paths are merged into alternative area information; Obtain the total travel time T in zone after traffic flow is redistributed in this alternative area
2Determine the total travel time variability index λ in zone=((T
2-T
1)/T
1) * 100%; Obtain in this alternative area scope the quick Disposal Measures of traffic accident incident that should take; Whether judge search radius R more than or equal to 2000 meters, if the quick Disposal Measures information of then each alternative area scope planted agent being taked of traffic accident incident passes to the main frame of vehicle supervision department by data transmission interface; Otherwise, then search radius R is prolonged 300 meters.
Description
Technical field
The present invention relates to after road traffic accident takes place, according to the traffic accident event information, determine that traffic control, signal controlling, information the quick Disposal Measures practical range of traffic such as induces, with reach the enforcement efficient that improves all kinds of traffic Disposal Measures, effectively alleviate site of the accident traffic pressure, reduce motor vehicle and incur loss through delay and avoid the further effect of diffusion of congested in traffic scope.Belong to the urban road transportation control field.
Background technology
Along with development and people's growth in the living standard of China's economic society, car progressively enters family, and the city automobile recoverable amount rapidly increases.The thing followed is that the urban highway traffic unscheduled event frequently takes place, and not only causes casualties, property loss, also easily causes the actual traffic capacity of road to descend, and causes that urban transportation is sporadic crowded.
For this reason, city traffic management department need be taked to dispose the traffic accident incident fast, dredges site traffic, avoids, alleviates sporadic the crowding of urban transportation that the traffic accident incident causes.Yet the quick Disposal Measures of taking at the traffic accident incident at present of traffic often only is confined to: hand over interior among a small circle road traffic control of patrol police and radio station, the large-scale information issue of broadcasting.Because the quick Disposal Measures of traffic is single, fail traffic control, signal controlling, information induced etc. that multiple Disposal Measures organically combines, integrated application, improve quick disposing capacity.
Through inventor's discovery that studies for a long period of time, along with traffic infrastructure build constantly perfect, China large-and-medium size cities have possessed the hardware condition of multiple traffic Disposal Measures integrated application fully.The main cause of at present can not be with the integrated application of multiple traffic Disposal Measures, farthest bringing into play various Disposal Measures usefulness is: traffic control, signal controlling, information such as induce to differ from one another and the scope of application at the quick disposal options of traffic, because road traffic accident is sporadic, can't determine the use zone of all kinds of quick Disposal Measures in time according to the traffic accident event information.Therefore, can only take enforcing traffic control, issuing simple measures such as event information among a small circle, alleviate the traffic pressure of spot on a large scale.If can be according to the current situation of traffic of traffic accident incident and surrounding area, determine the practical range of all kinds of traffic Disposal Measures fast, all kinds of traffic Disposal Measures of integrated application, then can bring into play the effect of all kinds of traffic disposal options to greatest extent, significantly improve the quick disposing capacity of road traffic accident.
Summary of the invention
Technical matters: the purpose of this invention is to provide a kind of road traffic accident information acquisition and disposal route, the influence that the site of the accident is caused at road traffic accident, by redistributing to the regional road traffic flow that links to each other, should the total travel time situation of change in zone after obtaining before the accident happened, determine the practical range of the quick Disposal Measures of dissimilar traffic, being convenient to the quick Disposal Measures of multiple traffic effectively implements and Collaboration, improve disposal efficiency, avoid normal traffic is caused unnecessary negative effect.
Technical scheme: road traffic accident information acquisition of the present invention and disposal route are:
1) according to the traffic accident event automatic detection system, determine that the traffic accident incident takies car lane and counts n, influences the magnitude of traffic flow Q of wagon flow and the processing time t of direction and traffic accident incident needs, by the parking ripple fundamental formular in the traffic current wave theory, calculate the queue length L that the traffic accident incident causes traffic congestion, the queue length overlay area is called the scope of blocking up
2) according to urban road network database and real-time traffic data on flows, in the net of urban traffic road, with the scope of blocking up is that the center is search radius R with 200 meters, the search service level is higher than scope road service level and the travel time data less than the traffic diverging path of the scope road travel time of blocking up of blocking up, the scope of will blocking up and shunt paths are merged into alternative area information
3) gather the real time data of traffic flow and the data of Forecast of Urban Traffic Flow historical data base according to the urban traffic signal supervisory system, the real-time traffic flow and the historical data thereof of each highway section that acquisition links to each other with alternative area, crossing, setting up interior each volume of traffic matrix that rises up between point of traffic dispersion alternative area is the OD matrix, by " Capacity Restrained Traffic Assignment Method " in the traffic engineering theory, obtain the total travel time T in zone after traffic flow is redistributed in this alternative area
2,
4) according to the total travel time T in the zone after traffic flow is redistributed in this alternative area
2With before the accident happened should the zone in total travel time T
1, determine the total travel time variability index in zone
5) according to variability index λ of total travel time of zone and current slot, obtain in this alternative area scope, the quick Disposal Measures of traffic accident incident that should take,
6) whether judge search radius R more than or equal to 200 meters, if then change step 7) over to; Otherwise, then search radius R is prolonged 300 meters, change step 2 over to),
7) the quick Disposal Measures information of each alternative area scope planted agent being taked of traffic accident incident passes to the main frame of vehicle supervision department by data transmission interface, and be used for quick Disposal Measures and implement,
8) the traffic accident incident still be untreated finish before, every 20 minutes, change step 1) over to, redefine the quick Disposal Measures practical range of traffic accident incident, be used for quick Disposal Measures and implement.
It is described that to set up each volume of traffic matrix that plays up between point in the traffic dispersion alternative area be that the method for OD matrix is:
1.) will rise up to point as alternative area with the crossing that links to each other around the alternative area, highway section,
2.) read the direction of the some place turnover so far volume of traffic real time data that traffic signal monitoring system is gathered, generate each and play the traffic generating capacity and the traffic traffic attraction distributed data of point so far,
3.) by the historical data of traffic flow data library storage, generated transport need distribution proportion between putting,
4.) rise up to traffic generating capacity, the traffic traffic attraction data put according to each, and play transport need distribution proportion between point, setting up each volume of traffic matrix that rises between putting is the OD matrix.
According to variability index λ of total travel time of zone and current place time period, obtain in this alternative area scope, the quick Disposal Measures of traffic accident incident that should take is:
1.) judge the current place time period:, determine that this period is rush-hour when hour magnitude of traffic flow compares greater than 7%; When hour magnitude of traffic flow compares greater than 3% and less than 7%, determine that this period is the traffic flat peak phase; When hour magnitude of traffic flow compares less than 3%, determine that this period is the traffic low ebb phase,
2.) in rush-hour, the zone of λ 〉=100% is the traffic control zone, and the zone of λ 〉=50% is the signal controlling zone, and the zone of λ 〉=8% is the signal induction zone,
3.) in the flat peak of the traffic phase, the zone of λ 〉=175% is the traffic control zone, and the zone of λ 〉=75% is the signal controlling zone, and the zone of λ 〉=12% is the signal induction zone,
4.) in the traffic low ebb phase, the zone of λ 〉=300% is the traffic control zone, and the zone of λ 〉=100% is the signal controlling zone, and the zone of λ 〉=20% is the signal induction zone.
Beneficial effect:
1. according to total travel time situation of change in the alternative area, judge the traffic Disposal Measures that alternative area scope planted agent takes, the selection that makes the traffic Disposal Measures is science more, can make full use of the time null resource of road, brings into play the advantage of all kinds of traffic Disposal Measures.
2. the traffic accident event data gathers, handles simple, not influenced by human factor, be convenient to according to the actual state of traffic accident incident and the traffic of neighboring area, generate objectively, the practical range of all kinds of Disposal Measures apace, help all kinds of Disposal Measures of vehicle supervision department's integrated application, improve the quick disposing capacity of urban highway traffic unscheduled event.
Description of drawings:
Fig. 1 is road traffic accident information acquisition and disposal route basic flow sheet.
Fig. 2 is the hunting zone synoptic diagram of alternative area.
Fig. 3 is the local road network structure synoptic diagram in Imperial Palace of Ming Dynasty area, Nanjing.
Fig. 4 is an alternative area A synoptic diagram in the example.
Fig. 5 is an alternative area B synoptic diagram in the example.
Fig. 6 is an alternative area C synoptic diagram in the example.
Fig. 7 is an alternative area D synoptic diagram in the example.
Embodiment
In conjunction with the accompanying drawings, the present invention will be further described:
A. find after the road traffic accident, confirm traffic congestion zone, real road traffic capacity decline situation that causes because of road traffic accident and the rate of propagation that blocks up thereof; According to character, characteristics, the order of severity of traffic accident incident, calculate the event handling time, determine the traffic congestion scope according to rate of propagation that blocks up and event handling time.
B. seek slow stifled branchs flowpath segment be used to relieve traffic congestion the volume of traffic in the congestion regions, alleviation congestion regions traffic pressure.With the congestion regions is the center, respectively with 200 meters, 500 meters, 800 meters, 1100 meters ... for radius is sought the slow stifled flowpath segment of dividing, the search service level is higher than the scope road service level of blocking up, travel time is less than the traffic diverging highway section of the scope road travel time of blocking up, the scope of blocking up is set up different alternative area with the merging of branch flowpath segment, until the quick Disposal Measures practical range of definite all kinds of traffic.
C. will link to each other the import and export of highway section, crossing with alternative area as the origin and destination of alternative area road network.With the volume of traffic of origin and destination transport need amount, determine transport need ratio between each origin and destination according to the historical data that the volume of traffic in each alternative area distributes, and set up the OD matrix of alternative area as the alternative area road network.
D. according to " Capacity Restrained Traffic Assignment Method " of determining the regional traffic flow distribution in the traffic engineering theory, the magnitude of traffic flow in the alternative area is redistributed, obtained the alternative area traffic flow and redistribute the total travel time T of gained
2
E. all kinds of traffic Disposal Measures practical ranges settle the standard and redistribute total travel time of being obtained as estimating foundation with traffic flow in the alternative area.The evaluation index that the inventor proposes is variability index λ of total travel time of alternative area, i.e. the total travel time T of gained is redistributed in alternative area traffic flow after the incident
2With total travel time T that before the accident happened should the zone
1The relative change rate.The zone is travel time variability index λ always, can be used for judging the traffic Disposal Measures of required employing in the alternative area.When variability index λ of total travel time of zone is big, illustrate that the traffic dispersion measure meeting traffic trip time in the zone of causing increases, bigger to cruising vehicle influence in the alternative area, need to adopt the pressure control measure, as traffic control, signal controlling etc., could realize the traffic dispersion purpose, the traffic flow jam of the site of the accident of postponing; When variability index λ of total travel time of zone hour, illustrate that traffic dispersion is less to cruising vehicle influence in this zone, can take the behavior control measure, as information induce, station broadcast information etc., realization traffic dispersion purpose.
According to inventor's factual survey and experiment repeatedly, determine under the different times, settle the standard based on all kinds of traffic Disposal Measures practical ranges of variability index λ of total travel time of zone, as shown in table 1:
The table 1 traffic administration zone criteria for classifying
Because rush-hour, the transport need of the network of communication lines is excessive, and the city localized road is in saturated conditions, and the traffic accident incident very easily causes traffic congestion, and the value of the standard λ in partitioning traffic control zone is less relatively.And in the flat peak of traffic phase and traffic low ebb phase, the urban traffic pressure is less relatively, and the value of the standard λ in partitioning traffic control zone can be relatively large.
F. all kinds of traffic Disposal Measures practical ranges not are changeless after determining.Need according to the congestion in traffic congestion zone and the situation of change of the traffic network volume of traffic, carry out timing to traffic Disposal Measures practical range and upgrade, until the traffic accident event handling finish, congestion regions recovers normally.Regularly the update cycle is 20 minutes, and main cause is: the first, and Short-Term Traffic Flow is unfavorable for that the traffic impact zone is definite.Timing statistics is referred to as Short-Term Traffic Flow less than 15 minutes the magnitude of traffic flow, characteristics such as that Short-Term Traffic Flow has is non-linear, randomness, high perturbation, can accurately reflecting regional in each highway section, crossing traffic flow situation; The second, the long timing update cycle can't in time be reflected the situation of change of the scope of blocking up and urban transportation amount, is not easy to traffic administration person and in time revises all kinds of traffic Disposal Measures practical ranges.
Example: select the research object of the local road network in Imperial Palace of Ming Dynasty area, city, Nanjing for invention, road network structure as shown in Figure 3.The network node that is numbered in the accompanying drawing 3 is numbered, adopt the traffic flow data of traffic evening peak phase, the automobile traffic load of road network is bigger, motor vehicle highway section service levels such as East Zhongshan Road, Zhujiang River road, East Road, Beijing belong to the D level, promptly near Unstable flow, bigger delay is arranged, but the driver can stand.
In evening peak period, the traffic accident incident occurs in the trunk roads East Zhongshan Road of this road network by node 34 past node 35 directions, the influence that the traffic accident incident causes this highway section shows as actual traffic capacity 1400pcu/h and reduces to 600pcu/h, cause sporadic blocking up, but incident discovery fashion does not have influence on the crossing of upstream.
Road traffic accident information acquisition and process flow because incident highway section, East Zhongshan Road can't be born the transport need in this highway section fully, need to seek the slow stifled flowpath segment of dividing, and set up each alternative area, and each alternative area is shown in accompanying drawing 4～accompanying drawing 7; Traffic flow in each alternative area is redistributed, variability index λ of total travel time of analyzed area, as shown in the table:
The total travel time variability index λ in table 2 zone analyzes
Settle the standard about all kinds of traffic Disposal Measures practical ranges according to table 1, can get rush-hour, be the traffic control scope in the alternative area A based on variability index λ of total travel time of zone; In the alternative area B is the signal controlling scope; Induce scope for transport information in the alternative area C; Can adopt radio station, broadcast message published method beyond the alternative area C.
Claims (3)
1. road traffic accident information acquisition and disposal route is characterized in that this method is:
1) according to the traffic accident event automatic detection system, determine that the traffic accident incident takies car lane and counts n, influences the magnitude of traffic flow Q of wagon flow and the processing time t of direction and traffic accident incident needs, by the parking ripple fundamental formular in the traffic current wave theory, calculate the queue length L that the traffic accident incident causes traffic congestion, the queue length overlay area is called the scope of blocking up
2) according to urban road network database and real-time traffic data on flows, in the net of urban traffic road, with the scope of blocking up is that the center is search radius R with 200 meters, the search service level is higher than scope road service level and the travel time data less than the traffic diverging path of the scope road travel time of blocking up of blocking up, the scope of will blocking up and shunt paths are merged into alternative area information
3) gather the real time data of traffic flow and the data of Forecast of Urban Traffic Flow historical data base according to the urban traffic signal supervisory system, the real-time traffic flow and the historical data thereof of each highway section that acquisition links to each other with alternative area, crossing, setting up interior each volume of traffic matrix that rises up between point of traffic dispersion alternative area is the OD matrix, by " Capacity Restrained Traffic Assignment Method " in the traffic engineering theory, obtain the total travel time T in zone after traffic flow is redistributed in this alternative area
2,
4) according to the total travel time T in the zone after traffic flow is redistributed in this alternative area
2With before the accident happened should the zone in total travel time T
1, determine the total travel time variability index in zone
5) according to variability index λ of total travel time of zone and current slot, obtain in this alternative area scope, the quick Disposal Measures of traffic accident incident that should take,
6) whether judge search radius R more than or equal to 200 meters, if then change step 7) over to; Otherwise, then search radius R is prolonged 300 meters, change step 2 over to),
7) the quick Disposal Measures information of each alternative area scope planted agent being taked of traffic accident incident passes to the main frame of vehicle supervision department by data transmission interface, and be used for quick Disposal Measures and implement,
8) the traffic accident incident still be untreated finish before, every 20 minutes, change step 1) over to, redefine the quick Disposal Measures practical range of traffic accident incident, be used for quick Disposal Measures and implement.
2. road traffic accident information acquisition according to claim 1 and disposal route is characterized in that described to set up each volume of traffic matrix that plays up between point in the traffic dispersion alternative area be that the method for OD matrix is:
1.) will rise up to point as alternative area with the crossing that links to each other around the alternative area, highway section,
2.) read the direction of the some place turnover so far volume of traffic real time data that traffic signal monitoring system is gathered, generate each and play the traffic generating capacity and the traffic traffic attraction distributed data of point so far,
3.) by the historical data of traffic flow data library storage, generated transport need distribution proportion between putting,
4.) rise up to traffic generating capacity, the traffic traffic attraction data put according to each, and play transport need distribution proportion between point, setting up each volume of traffic matrix that rises between putting is the OD matrix.
3. road traffic accident information acquisition according to claim 1 and disposal route, it is characterized in that according to variability index λ of total travel time of zone and current place time period, acquisition is in this alternative area scope, and the quick Disposal Measures of traffic accident incident that should take is:
1.) judge the current place time period:, determine that this period is rush-hour when hour magnitude of traffic flow compares greater than 7%; When hour magnitude of traffic flow compares greater than 3% and less than 7%, determine that this period is the traffic flat peak phase; When hour magnitude of traffic flow compares less than 3%, determine that this period is the traffic low ebb phase,
2.) in rush-hour, the zone of λ 〉=100% is the traffic control zone, and the zone of λ＞50% is the signal controlling zone, and the zone of λ 〉=8% is the signal induction zone,
3.) in the flat peak of the traffic phase, the zone of λ 〉=175% is the traffic control zone, and the zone of λ 〉=75% is the signal controlling zone, and the zone of λ 〉=12% is the signal induction zone,
4.) in the traffic low ebb phase, the zone of λ 〉=300% is the traffic control zone, and the zone of λ 〉=100% is the signal controlling zone, and the zone of λ 〉=20% is the signal induction zone.
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|---|---|---|---|
| CNB2007101902239A CN100541553C (en) | 2007-11-20 | 2007-11-20 | Road traffic accident data acquisition and processing (DAP) method |
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| CNB2007101902239A CN100541553C (en) | 2007-11-20 | 2007-11-20 | Road traffic accident data acquisition and processing (DAP) method |
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| CN100541553C true CN100541553C (en) | 2009-09-16 |
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Families Citing this family (17)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101477747B (en) * | 2009-01-05 | 2010-06-02 | 东南大学 | Signal control method for high density road grid in traffic rush hour |
| CN101510355B (en) * | 2009-03-30 | 2010-06-30 | 东南大学 | Method for determining traffic lane length of crossing inlet road for forbidding lane exchange |
| CN101894469B (en) * | 2010-07-21 | 2012-05-23 | 北京世纪高通科技有限公司 | Method and device for handling events in historical traffic information |
| CN102097004B (en) * | 2011-01-31 | 2013-02-20 | 上海美慧软件有限公司 | Mobile phone positioning data-based traveling origin-destination (OD) matrix acquisition method |
| CN102122435B (en) * | 2011-03-18 | 2014-09-17 | 北京世纪高通科技有限公司 | Method and device for positioning traffic event information |
| CN102184640B (en) * | 2011-05-05 | 2013-02-13 | 东南大学 | Method for automatically determining rescue path of expressway network |
| CN102419905B (en) * | 2011-08-12 | 2013-07-31 | 北京航空航天大学 | Traffic-wave theory-based traffic influence area determining method of expressway accidents |
| CN102521891B (en) * | 2011-12-06 | 2014-09-10 | 北京万集科技股份有限公司 | Method and system for detecting vehicle congestion at toll station |
| CN105575122B (en) * | 2016-02-26 | 2017-12-29 | 重庆交通大学 | A kind of determination method of forbidding change lane line length of bus station upstream |
| CN105761492B (en) * | 2016-05-04 | 2018-07-13 | 北京大学 | A kind of a wide range of highway network Dynamic Assignment method based on network flow |
| CN106408945B (en) * | 2016-11-28 | 2019-03-01 | 北京掌行通信息技术有限公司 | A kind of traffic congestion evaluation method and system |
| CN106846810B (en) * | 2017-03-13 | 2020-05-05 | 青岛海信网络科技股份有限公司 | Highway toll station current limiting method and device |
| CN108281000B (en) * | 2018-02-05 | 2020-08-14 | 北京交通大学 | System and method for analyzing influence of data-driven emergency on regional road network |
| CN108492556B (en) * | 2018-03-26 | 2022-06-21 | 京东方科技集团股份有限公司 | Method for issuing traffic accident avoidance information and cloud server |
| CN108428341A (en) * | 2018-05-14 | 2018-08-21 | 齐鲁交通发展集团有限公司青临分公司 | A kind of emergency traffic management and dispatching method and system based on human-computer fusion |
| CN110047288A (en) * | 2019-04-24 | 2019-07-23 | 葛志凯 | Alleviate the method and system of congestion in road |
| CN110184867A (en) * | 2019-06-10 | 2019-08-30 | 葛志凯 | Alleviate traffic congestion and reduces the roading method and system of vehicle exhaust emission |
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