CN103680163B - Based on the region bus signals mode of priority of public transport demand - Google Patents
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Abstract
The invention discloses a kind of region bus signals mode of priority based on public transport demand, comprise the following steps: (1), carry out the judgement of region class public traffic in priority, the public bus network i that in more current each crossing conflict override requests, priority weight is maximum; (2), carry out the judgement of line level public traffic in priority, the public bus network i described in judgement is in late state or normal condition, when being in late state, performs line level public traffic in priority, otherwise performs crossing level public traffic in priority; (3), described crossing level public traffic in priority: judging that current crossing priority vehicle is in late state or normal condition, when being in normal condition, performing normal crossing priority pattern, when being in late state, performing late crossing priority pattern.This method can avoid many public bus networks to trigger preferential process collision problem on crossing road on the one hand simultaneously; Line level public traffic in priority, intelligent selection single intersection mode of priority can be realized on the other hand, when blocking up, keep precession effect.
Description
Technical field
The invention belongs to bus signals priority acccess control technical 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, by the signal timing plan of optimal design urban road intersection, reaches public transit vehicle compared with public vehicles preferentially by the target of crossing.Bus signals priority acccess control greatly can improve the urban road public transit vehicle traffic capacity, has indirectly encouraged resident to select bus trip mode, is conducive to the development advancing public transport cause.Day by day suddenly, the today increased in urban traffic pressure, this control method, for rapid evacuation traffic pressure, alleviates traffic congestion significant.
At present, the modes such as ripe bus signal priority control method is mainly early opened by preferential phase place at single intersection, evening is disconnected, insertion, reversing, redirect, when guaranteeing public transit vehicle approaching stop line, public traffic in priority phase place can maintain or change green light phase into, thus makes public transit vehicle pass through crossing smoothly.Phase place early opens the green light referring to and open bright public transit vehicle place phase place in advance.The phase place disconnected green time referring to prolongation public transit vehicle place phase place in evening.Phase place is inserted and is referred to that insertion one is exclusively used in the phase place of clearance public transit vehicle in current feedback control scheme.Phase place reversing refers to change phase-relate, and public transport phase place is adjusted to the most front execution, then to let pass other vehicles according to former phase-relate.Phase place redirect refers to the phase place skipped and be about to perform, and directly performs 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 pass through time, 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 traffic congestion occurs for main line or region, single intersection bus signals precession effect is general, even if public transit vehicle preferentially have passed a certain crossing, but due to main line or area traffic jamming, public transit vehicle is still stagnated in section, from overall public bus network, public transit vehicle reality enjoys right-of-way not yet.
The application for a patent for invention that publication number is CN102737517A, denomination of invention is " a kind of bus priority control system and method can carrying out priority signal prompting " discloses and a kind ofly provides the control system of priority signal for public transit vehicle, and the application multiple video detecting unit be arranged on the road of crossing certain distance detect the number-plate number information of driving vehicles; The public transit vehicle number-plate number information of the number-plate number information of driving vehicle and storage compares by data processing unit, when number-plate number information matches, priority signal is sent to described Signalized control unit, for public transit vehicle provides the green light signals preferentially passed through according to the direction that vehicle travels.The mode focused on by Car license recognition, comparative analysis of this invention, detects public transit vehicle priority requirement.
Publication number is CN101587647, denomination of invention discloses 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, devise the genetic algorithms approach optimized towards extensive whistle control system and the networking genetic algorithm encoding scheme with universality, establish the Comprehensive Control objective function merging multiple evaluation index.This scheme focus on the regional coordination method for controlling priority of setting forth a kind of facing area public transit vehicle, the Philodendron ‘ Emerald Queen' for public transit vehicle can be realized.But this technical scheme by bus stop station, waiting Passengen, the driving behavior such as to restart and affect comparatively large, 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 the timing scheme of multiple crossing in region in real time, feasible region bus signals is preferential, according to multi public transport demand degree of strength, in region, all obtain right-of-way in various degree.
Summary of the invention
The present invention can not Intelligent treatment preferentially conflict to solve the present situation mode of priority, artificial experience predetermined processing priority can only be relied on, and under large area congestion in road condition, the problem of tradition bus signals mode of priority less effective, provide a kind of region bus signals mode of priority based on public transport demand, on the one hand by arranging priority weight to different public bus network, execution area level public traffic in priority in one's respective area, avoid many public bus networks and trigger preferential process collision problem on crossing road simultaneously, public bus network priority rule in forming 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 keeping precession 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:
Based on a region bus signals mode of priority for public transport demand, comprise the following steps:
(1), the judgement of region class public traffic in priority is first carried out, the public bus network i that in more current each crossing conflict override requests, priority weight is maximum, 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 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 state that the public bus network i described in judgement is current: late state or normal condition, when being in late state, perform line level public traffic in priority, otherwise perform 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, the override requests of the heavy maximum public bus network of execution priority.
Further, in described step (3), also comprise and judge whether current crossing is in late step by the public transit vehicle on preferential public bus network, if public transit vehicle is late, then perform late crossing priority pattern, otherwise perform 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, perform step (312), otherwise removal request, performs step (316);
(312), judge whether current public transport phase place J phase place is green light, if so, perform disconnected module in evening, otherwise, perform step (313);
(313), judge whether the J-1 phase place before current public transport phase place is green light, if so, perform and early open module, otherwise, perform step (314);
(314), judge whether current barrier place phase place is green light, if so, excute phase insert module, otherwise, perform step (315);
(315), request preservation timing is constant;
(316), terminate.
Again further, described normal crossing priority pattern comprises the following steps:
(321), judge whether to receive public transport request signal, if so, perform step (322), otherwise removal request, performs step (325);
(322), judge whether current public transport phase place J phase place is green light, if so, perform disconnected module in evening, otherwise, perform step (323);
(323), judge whether the J-1 phase place before current public transport phase place is green light, if so, perform and early open module, otherwise, perform step (324);
(324), request preservation timing is constant;
(325), terminate.
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 controlling each crossing of public bus network i on the way
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)th crossing and the n-th 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;
During n ≠ 1,
wherein, L
(n-1, n)be section spacing (m) at (n-1)th crossing and the n-th 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)th crossing and the n-th crossing needs to stop, f is bus stop regulating time (s), and this regulating time comprises vehicle deceleration and 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 for maximum in public bus network i on the way all crossings cycle:
C
i＝maxC
i(n)；
Wherein, C
i (n)=g
i (n, excellent)+ Σ g
i (n, non-optimum),
G
i (n, excellent)for public traffic in priority phase place green time, g
i (n, non-optimum)for non-public traffic in priority phase place green time.
The method of the state that the public bus network i described in judging in step (2) is current is:
Obtain the late vehicle number n of public bus network i
i(n
i>=0), the late time t of a jth bus
jif, late vehicle number n
i>=N, and
then 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 bus is late is: intelligent bus dispatching system passes through vehicle-mounted GPS equipment, the latitude and longitude information (x of n-th bus of Real-time Obtaining public bus network i
i (n), y
i (n)), the position of bus station is (X, Y), if
then think that bus is in the state of arriving at a station, otherwise be state leaving from station, the intelligent bus dispatching system record corresponding moment, contrast public transport operation timetable, judges the late status information of bus.
Compared with prior art, advantage of the present invention and good effect are: the bus signals mode of priority of the present invention, first by arranging priority weight to different public bus network, execution area level public traffic in priority in one's respective area, avoid many public bus networks and trigger preferential process collision problem on crossing road simultaneously, public bus network priority rule in forming region.Next carries out the judgement of line level public traffic in priority, has the bus signals precedence technique towards public bus network and scheme, solves due to congestion in road on the way, the problem of single intersection public traffic in priority less effective.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, reduces the interference of classic method to crossing traffic order to greatest extent on the other hand.
After reading the detailed description of embodiment of the present invention by reference to the accompanying drawings, the other features and advantages of the invention will become clearly.
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 one, present embodiments 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 that in more current each crossing conflict override requests, priority weight is maximum, 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 through one's respective area arbitrary intersection and trigger public traffic in priority request simultaneously, the circuit i that priority processing public bus network priority weight is larger by request;
S2, carry out the judgement of line level public traffic in priority, the state that the public bus network i described in judgement is current: late state or normal condition, when being in late state, perform line level public traffic in priority, otherwise perform 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, the override requests of the heavy maximum public bus network of execution priority.
The bus signals mode of priority of the present embodiment, by arranging priority weight to different public bus network, execution area level public traffic in priority in one's respective area, avoids many public bus networks and triggers preferential process collision problem on crossing road simultaneously, public bus network priority rule in forming region.Next carries out the judgement of line level public traffic in priority, has the bus signals precedence technique towards public bus network and scheme, solves due to congestion in road on the way, the problem of single intersection public traffic in priority less effective.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, reduces the interference of classic method to crossing traffic order to greatest extent on the other hand.
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 public bus network i and j exists crossing point crossing A, and P
i>P
j, then, when the public transit vehicle of public bus network i and j triggers public traffic in priority request at crossing A simultaneously, the preferential of public transit vehicle of preferential answering process public bus network i passes through request.Thus, forming region public traffic in priority rule.
Shown in Figure 1, provide a kind of region bus signals mode of priority logical diagram based on public transport demand, 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 a jth bus
jif, late vehicle number n
i>=N, and
then 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 late method of bus is: intelligent bus dispatching system passes through vehicle-mounted GPS equipment, the latitude and longitude information (x of n-th bus of Real-time Obtaining public bus network i
i (n), y
i (n)), the position of bus station is (X, Y), if
then think that bus is in the state of arriving at a station, otherwise be state leaving from station, the intelligent bus dispatching system record corresponding moment, contrast public transport operation timetable, judges the late status information of bus.In described step S3, also comprise and judge whether current crossing is in late step by the public transit vehicle on preferential public bus network, if public transit vehicle is late, then perform late crossing priority pattern, otherwise perform 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, performs step S316;
S312, judge whether current public transport phase place J phase place is green light, if so, perform disconnected module in evening, otherwise, perform step S313;
S313, judge whether the J-1 phase place before current public transport phase place is green light, if so, perform and early open module, otherwise, perform step S314;
S314, judge whether current barrier place phase place is green light, if so, excute phase insert module, otherwise, perform step S315;
S315, request preserve timing 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, performs step S325;
S322, judge whether current public transport phase place J phase place is green light, if so, perform disconnected module in evening, otherwise, perform step S323;
S323, judge whether the J-1 phase place before current public transport phase place is green light, if so, perform and early open module, otherwise, perform step S324;
S324, request preserve timing 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 whether public bus network is in late state.Traffic signal control system performs line level public traffic in priority for late state public bus network, coordination optimization circuit crossing on the way; Crossing level public traffic in priority is only performed for normal condition public bus network, when bus arrives crossing, trigger public transport detecting device, or car-mounted device communicates with roadside equipment, after teleseme receives public transport request signal, judge real-time conditions, if eligible, then change teleseme timing, carry out green light prolongation, open bright or phase place insertion in advance, according to public transport operation condition adjudgement 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 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 controlling each crossing of public bus network i on the way
max, other direction green times are constant.Wherein, g
maxit is the maximum green time pre-set, by the public transit vehicle travel direction green time at each on the way crossing of coordination optimization public bus network i, crossing phase differential and common period, achieve line level public traffic in priority, prevent when traffic congestion occurs for main line or region, the problem of single intersection bus signals precession effect cannot be embodied, even if public transit vehicle preferentially have passed a certain crossing, but due to main line or area traffic jamming, from overall public bus network, public transit vehicle reality enjoys right-of-way not yet.
Described phase difference optimization method is: O
i (n-1, n)for the relative phase difference of (n-1)th crossing and the n-th 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;
During n ≠ 1,
wherein, L
(n-1, n)be section spacing (m) at (n-1)th crossing and the n-th 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)th crossing and the n-th crossing needs to stop, f is bus stop regulating time (s), and this regulating time comprises vehicle deceleration and 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 for maximum in public bus network i on the way all crossings cycle:
C
i＝maxC
i(n)；
Wherein, C
i (n)=g
i (n, excellent)+ Σ g
i (n, non-optimum),
G
i (n, excellent)for public traffic in priority phase place green time, g
i (n, non-optimum)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 towards public bus network and scheme, solves due to congestion in road on the way, the problem of single intersection public traffic in priority less effective.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, reduces the interference of classic method to crossing traffic order to greatest extent on the other hand.
Certainly; above-mentioned explanation is not limitation of the present invention; the present invention is also not limited in above-mentioned citing, the change 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 (9)
1., based on a region bus signals mode of priority for public transport demand, it is characterized in that, comprise the following steps:
(1), the judgement of region class public traffic in priority is first carried out, the public bus network i that in more current each crossing conflict override requests, priority weight is maximum, 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 through one's respective area arbitrary intersection and trigger public traffic in priority request simultaneously, the circuit i that priority processing public bus network priority weight is larger by request;
(2), carry out the judgement of line level public traffic in priority, the state that the public bus network i described in judgement is current: late state or normal condition, when being in late state, perform line level public traffic in priority, otherwise perform crossing level public traffic in priority;
The method of the state that the public bus network i described in judging in described step (2) is current is:
Obtain the late vehicle number n of public bus network i
i, n
i>=0, the late time t of a jth bus
jif, late vehicle number n
i>=N, and
then public bus network i is in the late state of circuit, otherwise public bus network i is in circuit normal condition, and wherein, N is preset vehicle number threshold value, is positive integer, and T is preset time threshold, is positive number;
(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, the public traffic in priority of the heavy maximum public bus network of execution 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 and judge whether current crossing is in late step by the public transit vehicle on preferential public bus network, if public transit vehicle is late, then perform late crossing priority pattern, otherwise perform 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, perform step (312), otherwise removal request, performs step (316);
(312), judge whether current public transport phase place J phase place is green light, if so, perform disconnected module in evening, otherwise, perform step (313);
(313), judge whether the J-1 phase place before current public transport phase place is green light, if so, perform and early open module, otherwise, perform step (314);
(314), judge whether current barrier place phase place is green light, if so, excute phase insert module, otherwise, perform step (315);
(315), request preservation timing is constant;
(316), terminate.
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, perform step (322), otherwise removal request, performs step (325);
(322), judge whether current public transport phase place J phase place is green light, if so, perform disconnected module in evening, otherwise, perform step (323);
(323), judge whether the J-1 phase place before current public transport phase place is green light, if so, perform and early open module, otherwise, perform step (324);
(324), request preservation timing is constant;
(325), terminate.
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 controlling each crossing of public bus network i on the way
max, other direction green times are constant, wherein, and g
maxit is the maximum green time pre-set.
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)th crossing and the n-th 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;
During n ≠ 1,
wherein, L
(n-1, n)be the section spacing at (n-1)th crossing and the n-th crossing, unit is m, V is public transit vehicle average overall travel speed, and unit is m/s,
be the station quantity that the public transit vehicle of the public bus network i between (n-1)th crossing and the n-th crossing needs to stop, f is bus stop regulating time, and unit is s, and this regulating time comprises vehicle deceleration and 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, it is characterized in that, described common period optimization method is:
Crossing common signal cycle C
iall unified for maximum in public bus network i on the way all crossings cycle:
C
i＝maxC
i(n)；
Wherein, C
i (n)=g
i (n, excellent)+ Σ g
i (n, non-optimum),
G
i (n, excellent)for public traffic in priority phase place green time, g
i (n, non-optimum)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, it is characterized in that, judge that the method that indivedual bus is late is: intelligent bus dispatching system passes through vehicle-mounted GPS equipment, the latitude and longitude information (x of n-th bus of Real-time Obtaining public bus network i
i (n), y
i (n)), the position of bus station is (X, Y), if
then think that bus is in the state of arriving at a station, otherwise be state leaving from station, the intelligent bus dispatching system record corresponding moment, contrast public transport operation timetable, judge the late status information of bus, wherein, L is predeterminable range threshold value, is positive number.
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