CN103680163A - Regional bus signal priority method based on bus demands - Google Patents
Regional bus signal priority method based on bus demands Download PDFInfo
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Abstract
The invention discloses a regional bus signal priority method based on bus demands. The method includes the following steps of (1) carrying out region-grade bus priority judgment, and comparing conflict priority requests of current intersections to obtain a bus route i with the toppest priority, (2) carrying out a route-grade bus priority judgment, judging whether the bus route i is in a late state or a normal state, executing a route-grade bus priority if the bus route i is in the late state, and otherwise, executing an intersection-grade bus priority, (3) as for the intersection-grade bus priority, judging whether a priority vehicle at a current intersection is in a late state or a normal state, executing a normal intersection priority mode when the vehicle is in the normal state, and executing the late intersection priority mode when the vehicle is in the late state. By means of the method, on one hand, the probability that multiple bus routes trigger a priority processing conflict problem at an intersection at the same time is avoided, on the other hand, the intersection-grade bus priority and an intelligent selection single-intersection priority mode can be achieved, and the priority effect is maintained during a traffic jam.
Description
Technical field
The invention belongs to the preferential control technology of bus signals field, specifically, relate to a kind of region bus signals mode of priority based on public transport demand.
Background technology
So-called " bus signals is preferential ", is a kind of implementation of urban transportation " public traffic in priority ", and it is by the signal timing plan of optimal design urban road intersection, reach public transit vehicle compared with public vehicles preferentially by the target of crossing.The preferential control of bus signals can greatly improve the urban road public transit vehicle traffic capacity, has indirectly encouraged resident to select bus trip mode, is conducive to advance the development of public transport cause.Day by day suddenly the today increasing in urban traffic pressure, this control method, for rapid evacuation traffic pressure, is alleviated traffic congestion significant.
At present, ripe bus signal priority control method be mainly single intersection by preferential phase place early open, the mode such as evening is disconnected, insertion, reversing, redirect, while guaranteeing public transit vehicle approaching stop line, public traffic in priority phase place can maintain or change into green light phase, thereby makes public transit vehicle pass through smoothly crossing.Phase place early opens and refers to the green light that opens in advance bright public transit vehicle place phase place.The phase place disconnected green time that extends public transit vehicle place phase place that refers in evening.Phase place insertion refers to inserts a phase place that is exclusively used in clearance public transit vehicle in current control program.Phase place reversing refers to and changes phase place phase sequence, and public transport phase place is adjusted to the most front execution, then according to former phase place phase sequence other vehicles of letting pass.Phase place redirect refers to skips the phase place that is about to execution, directly carries out public transport phase place.
Along with city size development expands, resident trip rush of demand, the public bus network coverage rate at each crossing, urban district is higher, the tradition bus signals mode of priority can not practical requirement, be mainly manifested in: 1) when crossing all directions exist many public transit vehicle requests preferentially to pass through, the present situation mode of priority can not Intelligent treatment preferentially be conflicted, and can only rely on artificial experience predetermined processing priority; 2) when main line or region generation traffic congestion, the preferential effect of single intersection bus signals is general, even if public transit vehicle has preferentially passed through a certain crossing, but due to main line or area traffic jamming, public transit vehicle is still stagnated in section, from whole public bus network, public transit vehicle reality is not enjoyed right-of-way yet.
Publication number is that application for a patent for invention that CN102737517A, denomination of invention are " a kind of bus priority control system and the method that can carry out priority signal prompting " discloses and a kind ofly for public transit vehicle provides a plurality of video detecting unit on the road that the control system of priority signal, application be arranged at crossing certain distance, detects the number-plate number information of driving vehicles; Data processing unit compares the public transit vehicle number-plate number information of the number-plate number information of driving vehicle and storage, when number-plate number information matches, according to the direction of Vehicle Driving Cycle, priority signal is sent to described signal lamp control module, for public transit vehicle provides the green light signals of preferentially passing through.This invention focus on by car plate identify, the mode of comparative analysis, detect the preferential demand of public transit vehicle.
Publication number is that CN101587647, denomination of invention disclose a kind of networked public transport priority signal coordinating control method for " a kind of networked public transport priority signal coordinating control method ", the signal timing plan that the method adopts fixed cycle induction to control, design genetic algorithms approach and the networking genetic algorithm encoding scheme with universality towards extensive whistle control system optimization, set up the Comprehensive Control objective function that merges a plurality of evaluation indexes.The regional coordination method for controlling priority that focuses on setting forth a kind of facing area public transit vehicle of this scheme, can realize for the green wave coordination of public transit vehicle and controlling.But it is larger that the driving behavior such as this technical scheme is subject to bus stop station, waiting Passengen, restart affects, and implementation condition is very harsh.
Based on this, how to invent a kind of region bus signals mode of priority based on public transport demand, can change in real time the timing scheme of a plurality of crossings in region, feasible region bus signals is preferential, according to multi public transport demand degree of strength, in region, all obtaining right-of-way in various degree, is the technical matters that the present invention mainly solves.
Summary of the invention
The present invention can not Intelligent treatment preferentially conflict in order to solve the present situation mode of priority, can only rely on artificial experience predetermined processing priority, and road large area is blocked up under condition, the not good enough problem of tradition bus signals mode of priority effect, a kind of region bus signals mode of priority based on public transport demand is provided, on the one hand by different public bus networks are arranged to priority weight, execution area level public traffic in priority in one's respective area, avoid many public bus networks on crossing road, to trigger preferential processing collision problem simultaneously, formed public bus network priority rule in region.On the other hand, by coordination optimization public bus network on the way each crossing control program, realize line level public traffic in priority, and intelligent selection single intersection mode of priority, reach the target that keeps preferential effect under the condition of blocking up.
In order to solve the problems of the technologies described above, the present invention is achieved by the following technical solutions:
A region bus signals mode of priority based on public transport demand, comprises the following steps:
(1), first carry out the judgement of region class public traffic in priority, the public bus network i of priority weight maximum in more current each crossing conflict override requests, execution area level public traffic in priority in one's respective area, described region class public traffic in priority is: many different public bus networks are during through arbitrary intersection of one's respective area, and the public bus network i that priority processing public transport weight is larger passes through request;
(2), carry out the judgement of line level public traffic in priority, the current state of public bus network i that judgement is described: late state or normal condition, when in late state, carry out line level public traffic in priority, otherwise carry out crossing level public traffic in priority;
(3), described crossing level public traffic in priority is: the priority weight of all public bus networks of public transport request is triggered at more current crossing, for the public bus network of priority weight maximum is carried out public traffic in priority.
Further, in described step (3), also comprise judge current crossing by the public transit vehicle on preferential public bus network whether in late step, if public transit vehicle is late, carry out late crossing priority pattern, otherwise carry out normal crossing priority pattern.
Further, described late crossing priority pattern comprises the following steps:
(311), judge whether to receive public transport request signal, if so, execution step (312), otherwise, removal request, execution step (316);
(312), judge whether current public transport phase place j phase place is green light, if so, carry out disconnected module in evening, otherwise, execution step (313);
(313), judge whether the j-1 phase place before current public transport phase place is green light, if so, carry out and early open module, otherwise, execution step (314);
(314), judge whether current barrier place phase place is green light, if so, excute phase insert module, otherwise, execution step (315);
(315) it is constant that, timing is preserved in request;
(316), finish.
Again further, described normal crossing priority pattern comprises the following steps:
(321), judge whether to receive public transport request signal, if so, execution step (322), otherwise, removal request, execution step (325);
(322), judge whether current public transport phase place j phase place is green light, if so, carry out disconnected module in evening, otherwise, execution step (323);
(323), judge whether the j-1 phase place before current public transport phase place is green light, if so, carry out and early open module, otherwise, execution step (324);
(324) it is constant that, timing is preserved in request;
(325), finish.
Preferably, the line level public traffic in priority described in step (2) comprises common period optimization, offset optimization and public transport phase place Split Optimization.
Further, described public transport phase place Split Optimization method is: the public transit vehicle travel direction green time g=g that controls each crossing on the way of public bus network i
max, other direction green times are constant.
Again further, described phase difference optimization method is: O
i(n-1, n)for the relative phase difference of n-1 crossing and n crossing public transport phase place on the way on public bus network i, n=1,2,3 ...,
During n=1, O
i(0,1)=0;
N ≠ 1 o'clock,
wherein, L
(n-1, n)be the section spacing (m) at n-1 crossing and n crossing, V is public transit vehicle average overall travel speed (m/s),
be the station quantity that the public transit vehicle of the public bus network i between n-1 crossing and n crossing need to be stopped, f is that bus stop regulates the time (s), and this adjusting time comprises that vehicle deceleration enters the station time, vehicle boarding and alighting time, vehicle launch time;
Described crossing common period optimization method is:
Crossing common signal cycle C
iall unified is that all crossings are maximum in the cycle on the way for public bus network i:
C
i=maxC
i（n）；
Wherein, C
i(n)=g
i (n, excellent)+ ∑ g
i (n, non-excellent),
G
i (n, excellent)for public traffic in priority phase place green time, g
i (n, non-excellent)for non-public traffic in priority phase place green time.
The method that judges the state that described public bus network i is current in step (2) is:
Obtain the late vehicle number n of public bus network i
i(n
i>=0), the late time t of j bus
jif, late vehicle number n
i>=N, and
public bus network i is in the late state of circuit, otherwise public bus network i is in circuit normal condition.
Preferably, judge that the method that indivedual buses are late is: intelligent bus dispatching system is by vehicle-mounted GPS equipment, the latitude and longitude information (x of n the bus of Real-time Obtaining public bus network i
i(n), y
i(n)), the position of bus station is (X, Y), if
think that bus is in the state of arriving at a station, otherwise be state leaving from station, intelligent bus dispatching system records the corresponding moment, contrast public transport operation timetable, the late status information of judgement bus.
Compared with prior art, advantage of the present invention and good effect are: first by different public bus networks are arranged to priority weight, execution area level public traffic in priority in one's respective area, avoid many public bus networks on crossing road, to trigger preferential processing collision problem simultaneously, formed public bus network priority rule in region.Next carries out the judgement of line level public traffic in priority, has bus signals precedence technique and scheme towards public bus network, has solved due to congestion in road on the way the problem that single intersection public traffic in priority effect is not good enough.In addition, adopt crossing level public traffic in priority, according to the power of public transport demand, intelligent selection single intersection public traffic in priority mode, has responded public traffic in priority demand on the one hand in time, has reduced to greatest extent on the other hand the interference of classic method to crossing traffic order.
Read by reference to the accompanying drawings after the detailed description of embodiment of the present invention, it is clearer that the other features and advantages of the invention will become.
Accompanying drawing explanation
Fig. 1 is a kind of region bus signals mode of priority logical diagram based on public transport demand proposed by the invention;
Fig. 2 is late crossing priority mode logic figure in Fig. 1;
Fig. 3 is normal crossing priority mode logic figure in Fig. 1.
Embodiment
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is described in more detail.
Embodiment mono-, and the present embodiment provides a kind of region bus signals mode of priority based on public transport demand, comprises the following steps:
S1, first carry out the judgement of region class public traffic in priority, the public bus network i of priority weight maximum in more current each crossing conflict override requests, execution area level public traffic in priority in one's respective area, described region class public traffic in priority is: the public bus network of many different directions is through arbitrary intersection of one's respective area and while triggering public traffic in priority request simultaneously, and the circuit i that priority processing public bus network priority weight is larger passes through request;
S2, carry out the judgement of line level public traffic in priority, the current state of public bus network i that judgement is described: late state or normal condition, when in late state, carry out line level public traffic in priority, otherwise carry out crossing level public traffic in priority;
S3, described crossing level public traffic in priority are: the priority weight of all public bus networks of public transport request is triggered at more current crossing, for the public bus network of priority weight maximum is carried out public traffic in priority.
The bus signals mode of priority of the present embodiment, by different public bus networks are arranged to priority weight, execution area level public traffic in priority in one's respective area has avoided many public bus networks on crossing road, to trigger preferential processing collision problem simultaneously, forms public bus network priority rule in region.Next carries out the judgement of line level public traffic in priority, has bus signals precedence technique and scheme towards public bus network, has solved due to congestion in road on the way the problem that single intersection public traffic in priority effect is not good enough.In addition, adopt crossing level public traffic in priority, according to the power of public transport demand, intelligent selection single intersection public traffic in priority mode, has responded public traffic in priority demand on the one hand in time, has reduced to greatest extent on the other hand the interference of classic method to crossing traffic order.
At intelligent bus dispatching system, according to passenger's trip requirements, the priority weight P of design public bus network i
i(0≤P
i≤ 1).If there is crossing point crossing A in public bus network i and j, and P
i>P
j, when the public transit vehicle of public bus network i and j is when crossing A triggers public traffic in priority request simultaneously, preferential answering is processed public transit vehicle preferential by request of public bus network i.Thus, form region public traffic in priority rule.
Shown in Figure 1, a kind of region bus signals mode of priority logical diagram based on public transport demand is provided, in step S2, judge that the method for the state that described public bus network i is current is:
Obtain the late vehicle number n of public bus network i
i(n
i>=0), the late time t of j bus
jif, late vehicle number n
i>=N, and
public bus network i is in the late state of circuit, otherwise public bus network i is in circuit normal condition.
Preferably, the late method of judgement bus is: intelligent bus dispatching system is by vehicle-mounted GPS equipment, the latitude and longitude information (x of n the bus of Real-time Obtaining public bus network i
i(n), y
i(n)), the position of bus station is (X, Y), if
think that bus is in the state of arriving at a station, otherwise be state leaving from station, intelligent bus dispatching system records the corresponding moment, contrast public transport operation timetable, the late status information of judgement bus.In described step S3, also comprise judge current crossing by the public transit vehicle on preferential public bus network whether in late step, if public transit vehicle is late, carry out late crossing priority pattern, otherwise carry out normal crossing priority pattern.
As a preferred embodiment, shown in Figure 2, described late crossing priority pattern comprises the following steps:
S311, judge whether to receive public transport request signal, if so, perform step S312, otherwise, removal request, execution step S316;
S312, judge whether current public transport phase place j phase place is green light, if so, carry out disconnected module in evening, otherwise, execution step S313;
S313, judge whether the j-1 phase place before current public transport phase place is green light, if so, carry out and early open module, otherwise, execution step S314;
S314, judge whether current barrier place phase place is green light, if so, excute phase insert module, otherwise, execution step S315;
S315, that timing is preserved in request is constant;
S316, end.
Shown in Figure 3, described normal crossing priority pattern comprises the following steps:
S321, judge whether to receive public transport request signal, if so, perform step S322, otherwise, removal request, execution step S325;
S322, judge whether current public transport phase place j phase place is green light, if so, carry out disconnected module in evening, otherwise, execution step S323;
S323, judge whether the j-1 phase place before current public transport phase place is green light, if so, carry out and early open module, otherwise, execution step S324;
S324, that timing is preserved in request is constant;
S325, end.
Preferably, the line level public traffic in priority described in step S2 comprises common period optimization, offset optimization and public transport phase place Split Optimization.
Intelligent bus dispatching system Real-time Obtaining bus latitude and longitude information, judges that whether public bus network is in late state.Traffic signal control system is carried out line level public traffic in priority for late state public bus network, and coordination optimization circuit is crossing on the way; For normal condition public bus network, only carry out crossing level public traffic in priority, when bus arrives crossing, trigger public transport detecting device, or car-mounted device is communicated by letter with roadside equipment, teleseme receives after public transport request signal, judgement real-time conditions, if eligible, change teleseme timing, carry out green light prolongation, open bright or phase place insertion in advance, according to public transport operation state judgement public transport need state, form the method for a kind of rational management tradition crossing public traffic in priority pattern, make traditional mode of priority bring into play maximum combination benefit, the degree of social influence is simultaneously little.
Specifically in the present embodiment, described public transport phase place Split Optimization method is: the public transit vehicle travel direction green time g=g that controls each crossing on the way of public bus network i
max, other direction green times are constant.Wherein, g
maxit is the maximum green time setting in advance, public transit vehicle travel direction green time, crossing phase differential and the common period at each crossing on the way by coordination optimization public bus network i, realized line level public traffic in priority, prevent when main line or region generation traffic congestion, cannot embody the problem of the preferential effect of single intersection bus signals, even if public transit vehicle has preferentially passed through a certain crossing, but due to main line or area traffic jamming, from whole public bus network, public transit vehicle reality is not enjoyed right-of-way yet.
Described phase difference optimization method is: O
i(n-1, n)for the relative phase difference of n-1 crossing and n crossing public transport phase place on the way on public bus network i, n=1,2,3 ...,
During n=1, O
i(0,1)=0;
N ≠ 1 o'clock,
wherein, L
(n-1, n)be the section spacing (m) at n-1 crossing and n crossing, V is public transit vehicle average overall travel speed (m/s),
be the station quantity that the public transit vehicle of the public bus network i between n-1 crossing and n crossing need to be stopped, f is that bus stop regulates the time (s), and this adjusting time comprises that vehicle deceleration enters the station time, vehicle boarding and alighting time, vehicle launch time;
Described crossing common period optimization method is:
Crossing common signal cycle C
iall unified is that all crossings are maximum in the cycle on the way for public bus network i:
C
i=maxC
i（n）；
Wherein, C
i(n)=g
i (n, excellent)+ ∑ g
i (n, non-excellent),
G
i (n, excellent)for public traffic in priority phase place green time, g
i (n, non-excellent)for non-public traffic in priority phase place green time.
The bus signals mode of priority of the present embodiment also has bus signals precedence technique and the scheme towards public bus network, has solved due to congestion in road on the way the problem that single intersection public traffic in priority effect is not good enough.According to the power of public transport demand, intelligent selection single intersection public traffic in priority mode, has responded public traffic in priority demand on the one hand in time, has reduced to greatest extent on the other hand the interference of classic method to crossing traffic order.
Certainly; above-mentioned explanation is not limitation of the present invention; the present invention is also not limited in above-mentioned giving an example, and the variation that those skilled in the art make in essential scope of the present invention, remodeling, interpolation or replacement, also should belong to protection scope of the present invention.
Claims (10)
1. the region bus signals mode of priority based on public transport demand, is characterized in that, comprises the following steps:
(1), first carry out the judgement of region class public traffic in priority, the public bus network i of priority weight maximum in more current each crossing conflict override requests, execution area level public traffic in priority in one's respective area, described region class public traffic in priority is: the public bus network of many different directions is through arbitrary intersection of one's respective area and while triggering public traffic in priority request simultaneously, and the circuit i that priority processing public bus network priority weight is larger passes through request;
(2), carry out the judgement of line level public traffic in priority, the current state of public bus network i that judgement is described: late state or normal condition, when in late state, carry out line level public traffic in priority, otherwise carry out crossing level public traffic in priority;
(3), described crossing level public traffic in priority is: the priority weight of all public bus networks of public transport request is triggered at more current crossing, for the public bus network of priority weight maximum is carried out public traffic in priority.
2. the region bus signals mode of priority based on public transport demand according to claim 1, it is characterized in that, in described step (3), also comprise that whether the triggering override requests vehicle judging on current crossing priority circuit is in late step, if this vehicle is late, carry out late crossing priority pattern, otherwise carry out normal crossing priority pattern.
3. the region bus signals mode of priority based on public transport demand according to claim 2, is characterized in that, described late crossing priority pattern comprises the following steps:
(311), judge whether to receive public transport request signal, if so, execution step (312), otherwise, removal request, execution step (316);
(312), judge whether current public transport phase place j phase place is green light, if so, carry out disconnected module in evening, otherwise, execution step (313);
(313), judge whether the j-1 phase place before current public transport phase place is green light, if so, carry out and early open module, otherwise, execution step (314);
(314), judge whether current barrier place phase place is green light, if so, excute phase insert module, otherwise, execution step (315);
(315) it is constant that, timing is preserved in request;
(316), finish.
4. the region bus signals mode of priority based on public transport demand according to claim 3, is characterized in that, described normal crossing priority pattern comprises the following steps:
(321), judge whether to receive public transport request signal, if so, execution step (322), otherwise, removal request, execution step (325);
(322), judge whether current public transport phase place j phase place is green light, if so, carry out disconnected module in evening, otherwise, execution step (323);
(323), judge whether the j-1 phase place before current public transport phase place is green light, if so, carry out and early open module, otherwise, execution step (324);
(324) it is constant that, timing is preserved in request;
(325), finish.
5. the region bus signals mode of priority based on public transport demand according to claim 1, is characterized in that, the line level public traffic in priority described in step (2) comprises common period optimization, offset optimization and public transport phase place Split Optimization.
6. the region bus signals mode of priority based on public transport demand according to claim 5, is characterized in that, described public transport phase place Split Optimization method is: the public transit vehicle travel direction green time g=g that controls each crossing on the way of public bus network i
max, other direction green times are constant.
7. the region bus signals mode of priority based on public transport demand according to claim 6, is characterized in that,
Described phase difference optimization method is: O
i(n-1, n)for the relative phase difference of n-1 crossing and n crossing public transport phase place on the way on public bus network i, n=1,2,3 ...,
During n=1, O
i(0,1)=0;
N ≠ 1 o'clock,
wherein, L
(n-1, n)be the section spacing (m) at n-1 crossing and n crossing, V is public transit vehicle average overall travel speed (m/s),
be the station quantity that the public transit vehicle of the public bus network i between n-1 crossing and n crossing need to be stopped, f is that bus stop regulates the time (s), and this adjusting time comprises that vehicle deceleration enters the station time, vehicle boarding and alighting time, vehicle launch time.
8. the region bus signals mode of priority based on public transport demand according to claim 7, is characterized in that, described crossing common period optimization method is:
Crossing common signal cycle C
iall unified is that all crossings are maximum in the cycle on the way for public bus network i:
C
i=maxC
i（n）；
Wherein, C
i(n)=g
i (n, excellent)+ ∑ g
i (n, non-excellent),
G
i (n, excellent)for public traffic in priority phase place green time, g
i (n, non-excellent)for non-public traffic in priority phase place green time.
9. the region bus signals mode of priority based on public transport demand according to claim 1, is characterized in that, judges that the method for the state that described public bus network i is current is in step (2):
Obtain the late vehicle number n of public bus network i
i(n
i>=0), the late time t of j bus
jif, late vehicle number n
i>=N, and
public bus network i is in the late state of circuit, otherwise public bus network i is in circuit normal condition.
10. the region bus signals mode of priority based on public transport demand according to claim 9, it is characterized in that, judge that the method that indivedual buses are late is: intelligent bus dispatching system is by vehicle-mounted GPS equipment, the latitude and longitude information (x of n the bus of Real-time Obtaining public bus network i
i(n), y
i(n)), the position of bus station is (X, Y), if
think that bus is in the state of arriving at a station, otherwise be state leaving from station, intelligent bus dispatching system records the corresponding moment, contrast public transport operation timetable, the late status information of judgement bus.
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