CN102074117A - Regional short range synchronous road control method - Google Patents
Regional short range synchronous road control method Download PDFInfo
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- CN102074117A CN102074117A CN201010609495XA CN201010609495A CN102074117A CN 102074117 A CN102074117 A CN 102074117A CN 201010609495X A CN201010609495X A CN 201010609495XA CN 201010609495 A CN201010609495 A CN 201010609495A CN 102074117 A CN102074117 A CN 102074117A
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Abstract
The invention discloses a regional short range synchronous road control method. The method comprises the following steps of: investigating the traffic flow and facility status of a road, classifying the road into a smooth road, a crowded road and an obstructed road, drawing a road running status distribution map based on an investigation result, determining boundary zones among different crowded regions and partitioning the road into a plurality of regions; and adopting the same timing scheme on signal lamps at all intersections in each region and turning on green lamps synchronously in the same flow direction for permitting passing and turning off the green lamps synchronously for forbidding passing. In a regional signal lamp timing scheme, the period length of a key intersection is taken as a regional signal lamp timing period length, and a split green ratio of intersecting directions of regional signal lamp timing is determined according to the maximum flow ratio of intersecting directions. Through the method, traffic flow in intersecting directions in a region can continuously pass through a plurality of intersections in a period without consideration of the demands and reach distribution characteristics of traffic flows in different directions in a road network, parking possibility of vehicles in intersections in a busy hour can be decreased effectively, and delay is reduced.
Description
Technical field
The invention belongs to the urban road transportation control field, especially a kind of road subregion short distance synchronisation control means.
Background technology
Intersection is the main conflicts point of urban traffic flow, investigates and analyses data in a large number and shows, what urban transportation trip was incured loss through delay 40%～60% occurs in the crossing, rationally solves crossing traffic flow conflict, to improve operational efficiency very important.Therefore, the intersection signal lamp is controlled in the urban road transportation control management domain and occupies critical role.
Early stage intersection signal lamp is controlled to be single-point, fixedly timing mode, by the time separation of different directions traffic right-of-way being reached the purpose of safe transporting crossing vehicle.Though brought into play vital role in the urban traffic control in early days of this control mode, but its shortcoming is obvious: the traffic flow of urban road network is distributed in one day and constantly changes, fixedly timing mode is difficult to adapt to this variation, thereby brings the reduction of green time utilization factor and the increase of vehicle delay.
At this problem, traffic scientific research both domestic and external and engineering staff have carried out number of research projects, based on the mathematical theory and the automatic control technology of continuous progress, have researched and developed control mode and systems such as single-point induction control, regional coordination control.The single-point induction control system advances (going out) stomatodeum wagon flow data based on the crossing of gathering and comes real-time optimization to adjust the signal lamp timing, to adapt to the frequent variations that the magnitude of traffic flow and different directions transport need distribute.This system has stronger dirigibility, when the crossing saturation degree is not high, can significantly improve the utilization ratio of effective time signal period, but the peak all directions all when saturated timing to optimize leeway very little, substantially be equal to fixedly timing system, and because each crossing independent operating, be difficult to ensure that wagon flow moves continuously, network system efficient is not high.Regional coordination control can be divided into two kinds of " line traffic control ", " face controls " by the spatial dimension difference: line traffic control, claim green ripple again, be the special case of regional coordination control system, be meant by setting to make vehicle to pass through a plurality of crossings and dispense with parking continuously along the signal lamp phase differential and the timing of each crossing on the route; The face control, i.e. regional coordination control, by the signal lamp of some crossings in the road network being coordinated control, reach reduce in addition eliminate the vehicle crossing be obstructed probability, improve the purpose of network operation efficient.District system control system development in recent years is rapid, and is the most extensive with the SCOOTS system and the Australian SCATS system applies of Britain.Yet people find gradually in system's popularization and use, and the crowded period almost disappears totally the effect that existing regional coordination control improves network operation efficient on the peak, and total system degenerates into the single-point control system at this moment.
Find that by analysis existing face control method is difficult to adapt to the situation that the crisscross transport need of surface road network all is in the peak state, face control method and system that research can adapt under the high transport need of different directions are very necessary.
Summary of the invention
The object of the present invention is to provide a kind of road subregion short distance synchronisation control means, can adapt to the crisscross regional coordination control that all is under the high transport need state of road network, still can effectively improve the operational efficiency of network traffic in peak period.
In order to achieve the above object, the technical solution used in the present invention is:
A kind of road subregion short distance synchronisation control means, it may further comprise the steps:
1) according to the magnitude of traffic flow and the facility situation zoning of road, road network is divided into several zones;
2) all intersection signal lamps adopt identical timing scheme in each zone, and samely flow to that green light is opened clearance synchronously, close synchronously is forbidden.
Further, described step 1) is investigated the magnitude of traffic flow and the facility situation of road, road is divided into unimpeded, crowded and obstruction, draw road operation conditions distribution plan based on investigation result, determine the boundary zone of different congested area, get boundary zone midline crossing and be divided into several regions as the zone boundary.
According to road running status distribution plan, find the core congestion highway section of congested area, determine the unimpeded highway section that is connected between congested area based on this, the unimpeded highway section compositing area that draws is as boundary strip, selects line that the crossing of boundary strip centerline the forms separatrix as the zonule.
The crossing that the left-hand rotation dedicated phase is arranged in the described boundary zone is as separation.
Described step 2) the timing scheme in is the unified timing scheme that same cycle, unidirectional same split, zero phase difference are adopted in all crossings in the zone, wherein, synperiodic in the zone determined earlier to adopt single-point or fixedly timing method carry out timings separately in each crossing, and it is long as the timing cycle of regional signal lamp to choose in all crossings maximum cycle length then; Unidirectional is the maximum vehicle flowrate of crisscross section in the first statistical regions with split, determines the crisscross split of this regional signal lamp timing by crisscross throughput ratio.
To be divided into morning peak, evening peak peace three periods of peak in one day, determine the long and crisscross split of timing of timing cycle, adopt different timing schemes to control in the difference periods by the different periods.
Also comprise: the traffic data collection system is installed in the crossing that trunk roads that trunk roads in the zone and trunk roads intersect and flow is big and secondary distributor road intersect, gather each entrance driveway data on flows of crossing, the secular variation trend of monitored area flow space distribution is optimized renewal to signal lamp timing scheme.
The method of short distance synchro control is: according to road network facility pacing items and traffic circulation situation finding, finish the division of control subregion; According to the crisscross magnitude of traffic flow ratio in each crossing in subregion feature over time, to reduce overall delay is target, formulates the subregion signal lamp timing scheme (split that the unified cycle is long, crisscross) of different periods (as: peak period, flat peak period); Select interior important crossing, zone that the traffic data collection system is installed, the secular trend of monitoring fluctuations in discharge are constantly carried out the timing scheme optimization and are upgraded.
Owing to adopted above technical scheme, the invention has the beneficial effects as follows: the same signal lamp control method for coordinating that flows to the synchronous green light clearance of vehicle makes crisscross wagon flow can pass through some crossings continuously in one-period in the road network of zonule of the present invention, and need not to consider the demand size of different directions wagon flow in the road network and arrive distribution characteristics, can effectively reduce the intersection parking probability of vehicle peak period, reduce and incur loss through delay.
Description of drawings
Fig. 1 is a control system synoptic diagram of the present invention.
Fig. 2 is a zonule of the present invention short distance synchro control conceptual design synoptic diagram.
Fig. 3 is a zonule division methods synoptic diagram.
Fig. 4 is that the zonule divides road network branch direction maximum flow to calculate synoptic diagram.
Embodiment
Because the urban road network magnitude of traffic flow and space distribution are in time and frequent variations, traditional signal lamp crossing single-point, the reduction that fixedly timing mode tends to bring the effective green time utilization ratio.Therefore, the regional coordination control system has all been adopted in many cities, is gathering on the basis of transport information in real time, adopts the Scheme Choice formula that the intersection signal lamp in certain zone is coordinated control, moves continuously to keep vehicle, improves network operation efficient.Yet, existing regional coordination control system all is being difficult to play a role when saturated from all directions transport need amount: as " face control " special case, green ripple is controlled at when ensureing main line traffic circulation efficient, brought the decline of road intersection operational efficiency, when the road intersection transport need was big, the overall system operational efficiency was not high; And take into account " the face control " of different directions transport need, when all directions transport need all when big, key parameters such as cycle length, split, phase differential are determined difficulty, often attend to one thing and lose sight of another, system moves and controls near single-point.
Based on to the understanding of existing urban road network regional coordination control system in failure mechanism peak period, the method that the present invention proposes is that the same cycle is adopted in all the intersection signal lamp timings in the high density road among a small circle, unidirectional same split, the short distance synchronisation control means of zero phase difference, implementation method is that road network is divided into some zonules, different traffic characteristics at each zonule provide suitable intersection signal lamp timing scheme, all intersection signal lamp timing schemes are identical in the zone, and the same green light that flows to is opened clearance synchronously, close synchronously forbidden (this moment, crisscross green light was opened clearance synchronously).
High density urban ground road network of the present invention subregion short distance synchronisation control means, comprise: (1) adopts identical timing scheme to all intersection signal lamps in the zonule, and samely flow to that green light is opened clearance synchronously, close synchronously is forbidden, even guarantee that in peak period, crisscross wagon flow also can be passed through some crossings continuously in the zone in a signal lamp cycle; (2) division methods of zonule is: facility basic condition and traffic circulation to urban road network are carried out complete investigation, the urban transportation operation conditions is divided into unimpeded, crowded, obstruction Three Estate, draw urban highway traffic operation conditions distribution plan based on investigation result, find the boundary zone (the outer zone of forming by more unimpeded or unimpeded highway section of congested area) of different congested area, the crossing is as the border, zonule near the desirable boundary zone center line, and can pay the utmost attention to the left-hand rotation dedicated phase is arranged in the boundary zone the crossing as separation; (3) signal lamp timing design for scheme method in the zonule: (6:00-20:00) was divided into morning peak with one day time, evening peak peace three periods of peak, each crossing inlet road flow in the statistics day part zonule, press single-point, it is long that fixedly timing method provides signal lamp cycle respectively, select crucial crossing (maximum cycle the is long) cycle long long as this regional signal lamp timing cycle period, the maximum vehicle flowrate of the crisscross section in statistics zonule, determine the crisscross split of this period regional signal lamp timing by crisscross throughput ratio, the same signal lamp phase differential that flows in all crossings is zero; (4) the crisscross section maximum flow in zonule be on the direction network cut set comprise all link flows and in maximal value; (5) system implementation adopts the Scheme Choice formula, formulates controlling schemes of different periods by method in (3), according to the time segment call different schemes; (6) select the trunk roads in the zonule and trunk roads intersect and flow is big trunk roads and the crossing crossing installation traffic data collection system of secondary distributor road, gather each entrance driveway data on flows of crossing, the secular variation trend of monitored area flow space distribution, timing is optimized renewal to signal lamp to adopt (3) middle method.
The present invention is further illustrated below in conjunction with exemplifying embodiment shown in the accompanying drawing.
The implementation step of the method and system of the short distance synchro control that the present invention provides is as follows:
Step 1, the road equipment condition and the traffic circulation situation of road network are investigated.The road equipment condition comprises information such as travel in highway section number of track-lines, median strip, the non-separation band forms of machine, crossing inlet road number of track-lines, lane function division, adopts the manual patrol method to investigate; The traffic circulation situation comprises information such as the branch directional flow, road travel speed in each highway section, the data acquisition unit that data on flows can utilize the part crossing to lay is gathered automatically, and be aided with manual research and replenish, the Floating Car investigation method is adopted in the investigation of road travel speed, can utilize the gps data of existing taxi and bus, the part highway section can replenish some with the car enquiry data.
Step 2, enquiry data are handled.The data preparation of adopting the step 1 method to collect is become the flow and the travel speed in each highway section.
Step 3, provide the operation conditions evaluation in each highway section, be divided into unimpeded, crowded, obstruction Three Estate based on the travel speed that obtains of arrangement in the step 2.(classification thresholds of travel speed can be determined in implementation process according to the actual requirements)
Step 4, control zonule are divided.Draw road grid traffic running status distribution plan (Fig. 3), find the core congestion highway section (congested link or a large amount of crowded section of highway) of congested area (I-IV), determine the unimpeded highway section that is connected between congested area based on this, draw unimpeded highway section compositing area as boundary strip, and the line that the crossing (crossing that the left-hand rotation dedicated phase is set is preferentially selected) of the close boundary strip center line of selection is formed is as the separatrix of zonule.
Step 5, zonule short distance synchro control conceptual design.The unified timing scheme of same cycle, unidirectional same split, zero phase difference is adopted in all crossings in the zonule, and the same green light that flows to is opened clearance, close synchronously forbidden (Fig. 2) synchronously.Signal period, long definite method was: at first each crossing is carried out signal lamp timing conceptual design separately, and method for designing and single-point, fixedly timing method are identical; It is long as the regional signal lamp timing cycle to get all crossing maximum cycle length then.Definite method of split is: at first calculation plot territory road network cross-current to maximum flow, road network is as shown in Figure 4 established thing and is flowed to the total n bar of road, every comprises m highway section, gets Q
IjI ∈ [1, n], j ∈ [1, m] represents the investigation flow in j highway section of East and West direction i bar road, and then this road network East and West direction maximum flow should be
North-south maximum flow Q
Sn maxComputing method are identical; Get road network signal lamp timing East and West direction green time g then
EwWith north-south green time g
SnRatio g
Ew/ g
Sn=Q
Ewmax/ Q
Sn maxThereby, provide the zonule signal time distributing conception.
Step 6, conceptual design at times.One time (6:00-20:00) is divided into morning peak, evening peak peace three periods of peak, and the method that adopts step 5 to provide at each zonule provides the different timing schemes of different periods respectively.Wherein, morning peak, evening peak, the division of three periods of flat peak are decided on the urban transportation changes in demand, and for same city the same area, the common period is comparatively fixing, therefore can determine the time point of scheme conversion.From on long terms, can be based on traffic detection system image data in the zone, three periods are regularly revised.
Step 7, control system are implemented.At each setting area, zonule signal control processor (Fig. 1), and on establish a control center, control center adopts step 5, step 6 method to provide the scheme at times of all subregion signal timing dial, formation scheme collection, be distributed to the zonule signal control processor, the zonule signal control processor according to the time segment call corresponding scheme, finish signal lamp control in the zone.
Step 8, timing scheme optimization upgrade.Select the main roads crossing in the zonule that traffic data automatic acquisition equipment (Fig. 1) is installed, gather the crossing and respectively flow to traffic flow data, can adopt the step 5 method to continue to optimize and upgrade the timing scheme based on the variation tendency of magnitude of traffic flow distribution in the data long term monitoring zone.The system of selection of main roads crossing is: the crossing of preferentially selecting trunk roads and trunk roads to intersect, the trunk roads and the secondary distributor road crossing of big flow also should be monitored during the fund permission, can replenish construction based on existed system when specifically implementing.
The above-mentioned description to embodiment is can understand and apply the invention for ease of those skilled in the art.The person skilled in the art obviously can easily make various modifications to these embodiment, and needn't pass through performing creative labour being applied in the General Principle of this explanation among other embodiment.Therefore, the invention is not restricted to the embodiment here, those skilled in the art should be within protection scope of the present invention for improvement and modification that the present invention makes according to announcement of the present invention.
Claims (7)
1. road subregion short distance synchronisation control means, it is characterized in that: it may further comprise the steps:
1) according to the magnitude of traffic flow and the facility situation zoning of road, road network is divided into several zones;
2) all intersection signal lamps adopt identical timing scheme in each zone, and samely flow to that green light is opened clearance synchronously, close synchronously is forbidden.
2. road as claimed in claim 1 subregion short distance synchronisation control means, it is characterized in that: described step 1) is investigated the magnitude of traffic flow and the facility situation of road, road is divided into unimpeded, crowded and obstruction, draw road operation conditions distribution plan based on investigation result, determine the boundary zone of different congested area, get boundary zone midline crossing and be divided into several regions as the zone boundary.
3. road as claimed in claim 2 subregion short distance synchronisation control means, it is characterized in that: according to road running status distribution plan, find the core congestion highway section of congested area, determine the unimpeded highway section that is connected between congested area based on this, draw unimpeded highway section compositing area as boundary strip, and the line that the crossing of selection boundary strip centerline is formed is as the separatrix of zonule.
4. as claim 2 or 3 described road subregion short distance synchronisation control meanss, it is characterized in that: the crossing that the left-hand rotation dedicated phase is arranged in the described boundary zone is as separation.
5. road as claimed in claim 1 subregion short distance synchronisation control means, it is characterized in that: the timing scheme described step 2) is the unified timing scheme that same cycle, unidirectional same split, zero phase difference are adopted in all crossings in the zone, wherein, synperiodic in the zone determined earlier to adopt single-point or fixedly timing method carry out timings separately in each crossing, and it is long as the timing cycle of regional signal lamp to choose in all crossings maximum cycle length then; Unidirectional is the maximum vehicle flowrate of crisscross section in the first statistical regions with split, determines the crisscross split of this regional signal lamp timing by crisscross throughput ratio.
6. road as claimed in claim 5 subregion short distance synchronisation control means, it is characterized in that: will be divided into morning peak, evening peak peace three periods of peak in one day, determine the long and crisscross split of timing of timing cycle by the different periods, adopt different timing schemes to control in the different periods.
7. road as claimed in claim 1 subregion short distance synchronisation control means, it is characterized in that: also comprise: the traffic data collection system is installed in the crossing that trunk roads that trunk roads in the zone and trunk roads intersect and flow is big and secondary distributor road intersect, gather each entrance driveway data on flows of crossing, the secular variation trend of monitored area flow space distribution is optimized renewal to signal lamp timing scheme.
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| CN104091454A (en) * | 2014-06-13 | 2014-10-08 | 东南大学 | Traffic signal cooperative control system and control method for latticed road network |
| CN105741572A (en) * | 2016-04-01 | 2016-07-06 | 苏州玄禾物联网科技有限公司 | Traffic light control method in largest vehicle flowrate time period based on Internet of Things |
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| CN109326131A (en) * | 2018-11-28 | 2019-02-12 | 南京莱斯信息技术股份有限公司 | A kind of coordinating control of traffic signals method in adjust automatically period and split |
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| CN109326131A (en) * | 2018-11-28 | 2019-02-12 | 南京莱斯信息技术股份有限公司 | A kind of coordinating control of traffic signals method in adjust automatically period and split |
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| CN113257012B (en) * | 2021-06-10 | 2022-07-26 | 长沙理工大学 | Method for setting lane function and green light time of automatic driving mixed-driving intersection |
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