CN105702044A - Tram priority control method considering non-priority phase vehicle delay increase upper limit - Google Patents

Tram priority control method considering non-priority phase vehicle delay increase upper limit Download PDF

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CN105702044A
CN105702044A CN201610265109.7A CN201610265109A CN105702044A CN 105702044 A CN105702044 A CN 105702044A CN 201610265109 A CN201610265109 A CN 201610265109A CN 105702044 A CN105702044 A CN 105702044A
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phase place
tramcar
time
centerdot
delta
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CN105702044B (en
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冯树民
赵家发
慈玉生
孙祥龙
李勇
李振宁
赵琥
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Harbin Institute of Technology
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Harbin Institute of Technology
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    • GPHYSICS
    • G08SIGNALLING
    • G08GTRAFFIC CONTROL SYSTEMS
    • G08G1/00Traffic control systems for road vehicles
    • G08G1/01Detecting movement of traffic to be counted or controlled
    • G08G1/0104Measuring and analyzing of parameters relative to traffic conditions
    • G08G1/0125Traffic data processing
    • GPHYSICS
    • G08SIGNALLING
    • G08GTRAFFIC CONTROL SYSTEMS
    • G08G1/00Traffic control systems for road vehicles
    • G08G1/07Controlling traffic signals
    • G08G1/087Override of traffic control, e.g. by signal transmitted by an emergency vehicle

Abstract

The invention provides a tram priority control method considering the non-priority phase social vehicle and public transport vehicle delay increase upper limit, belongs to the field of urban traffic control, and aims at enhancing passage efficiency of trams and reducing influence on social vehicles and public transport vehicles. The increment of total people delay of each phase of each intersection is reduced as far as possible by limiting the upper limit of delay of the passing social vehicles and the public transport vehicles of non-priority phases. Firstly delay of the trams at the intersection is reduced by adjusting speed of the trams. Then a green light extension or red light early break strategy is selected to be applied to each non-priority phase by limiting the upper limit of the increment of delay of the passing vehicle of the non-priority phases so that influence on the single non-priority phase can be reduced. Meanwhile, delay caused on the regular public transport vehicles is specially considered and the increment of total people delay of each non-priority phase of the intersection is reduced as far as possible. Operation efficiency of urban public traffic can be enhanced and the healthy development of urban traffic can also be facilitated.

Description

A kind of tramcar method for controlling priority considering that the increase upper limit incured loss through delay by non-preferential phase place vehicle
Technical field
The present invention relates to a kind of tramcar method for controlling priority, belong to urban traffic control field。
Background technology
Tramcar is a kind of efficient, convenient, urban public transport means of transportation efficiently at ground handling。But due to relatively big by intersection signal control effect, traffic efficiency and the service quality of tramcar are relatively low。Prior art does not provide the traffic efficiency of solution tramcar and the technical scheme that service quality is relatively low。
Tramcar is implemented the measure that bus priority at intersection is current, is the effective means solving this problem。When tramcar being implemented bus priority at intersection and controlling, it is considered as incuring loss through delay, to what the current public vehicles of non-preferential phase place and public transport caused, the problem increased, it is to avoid non-preferential phase place is incured loss through delay to be increased too much, embodies the theory that people-oriented。
Summary of the invention
The present invention provides a kind of and considers that the tramcar method for controlling priority increasing the upper limit incured loss through delay by non-preferential phase place vehicle, to improve the traffic efficiency of tramcar and to reduce the impact on public vehicles and public transit vehicle。
The present invention solves that above-mentioned technical problem adopts the technical scheme that:
A kind of tramcar method for controlling priority considering that the increase upper limit incured loss through delay by non-preferential phase place vehicle that the present invention proposes, realizes according to the following steps:
1) tramcar stroke and speed detector are laid;
2) the tramcar T time of advent is detected at tramcar entrance drivewaya, it is known that tramcar operational speed range [Vmin,Vmax], the distance between entrance driveway detector and stop line is L;
According to formula(V=VmaxOr V=Vmin), then can show that the tramcar window time of advent is [T1,T2]。
Tramcar is [a, b] without what carry out priority requisition by time window。
RmFor this phase place red light break time the most very early in the morning, GmFor green light maximum extension time, then the moment interval [a+R that tramcar phase place red light is early disconnectedm, a] with green light postpone interval [b,b+Gm]。
3) the tramcar window time of advent [T is judged1,T2] with the relation of [a, b]。If [T1,T2] ∈ [a, b], then tramcar is without priority requisition, it is possible to normal through。
If T1A T2B or a T1B T2, then tramcar regulates the speed of service, and making time of advent window is [a, T2] or [T1, b], tramcar, normal through crossing, does not need to carry out preferential application, otherwise carries out next step and judges。
4) it is being unsatisfactory for 3) under condition, when electric car is interval for the time of adventOr Time, then crossing signal systems processes the priority requisition of tramcar, enters step 5)。Otherwise tramcar can not preferentially pass through。
5) when red light is early disconnected, the T time of advent is chosen2;When green light postpones, choose the T time of advent1。Calculate red light early disconnected duration Δ Tr=| T2-a | or green light delay duration Δ Tg=| T1-b|。
When implementing red light early disconnected measure, enter 6);
When implementing green light delay policy, enter 7)。
6) process priority requisition, take the concrete measures。When performing red light early disconnected strategy, compressing the green time of each phase place, concrete measure is:
From tramcar phase place, sort successively (assuming that the cycle has n phase place) to previous phase place, and with i, (each phase place is implemented red light early disconnected measure by i=1,2,3 ... n) each phase place sequence number of labelling。Early the break time is Δ Tr to the red light of the i-th phase placei, early the break time is Δ Tr to the red light of the 1st phase place1=Δ Tr。
Consider the minimum long green light time G of phase place simultaneouslyminThe higher limit U increased is incured loss through delay, it is determined that next phase place red light needs early break time Δ Tr with phase placei+1, it is iterated calculating。Enter 8)。
7) process priority requisition, take the concrete measures。When performing green light delay policy, compressing the green time of each phase place, concrete measure is:
From performing the phase place that tramcar is preferential, sort successively (assuming that the cycle has n phase place) to next phase place, with i (i=1,2,3 ... n) each phase place sequence number of labelling。The green extension of the i-th phase place is Δ Tri, the red light prolongation time of the 1st phase place is Δ Tr1=Δ Tg。
Consider the minimum long green light time G of phase place simultaneouslyminThe higher limit U increased is incured loss through delay, it is determined that next phase place green light needs prolongation time Δ Tr with phase placei+1, it is iterated calculating。Enter 8)。
8) < during n-1, calculate and judge next phase delta Tr meeting ii+1Whether it is zero, if zero, then stop continuing compression。
If Δ Tri+1>0,Then continue to be compressed non-preferential phase place calculating, until Δ Tri+1≤0。
9) if 6) or 7) each non-preferential phase place is sequentially carried out long green light time compression after, as i=n-1, Δ Tri+1> 0, then cannot meet the condition of tramcar priority pass, the priority requisition of electric car should be refused, now tramcar needs wait to pass through。
Above-mentioned 6) or 7) in, people's total delay increase computing formula of non-preferential phase place is as follows:
&Delta;D i = &Sigma; j = 1 m &lsqb; &Delta;d i j ( qs i j &CenterDot; P s + qb i j &CenterDot; P b ) &rsqb; , ( i = 2 , 3 , 4 ... n )
Wherein Δ DiFor i phase place people's total delay increment
ΔdijFor the delay that the vehicle of i phase place j entrance driveway increases
qsijArrival rate for the public vehicles of i phase place j entrance driveway
qbijArrival rate for the regular public traffic vehicle of i phase place j entrance driveway
PsFor the average carrying number of public vehicles
PbFor the average carrying number of public transit vehicle
The delay D of non-preferential phase placeiIt is calculated as follows:
D i = &Sigma; j = 1 m r i 2 &CenterDot; q i j &CenterDot; s i j 2 ( s i j - q i j ) ( qs i j &CenterDot; P s + qb i j &CenterDot; P b ) , ( i = 2 , 3 , 4 ... n )
qijFor i phase place j track vehicle arriving rate
sijFor i phase place j track vehicle departure rate
riFor the effective red time of i phase place
In non-preferential phase place, when red light is early disconnected, the people total delay increment Delta d of the i-th phase place j entrance drivewayijIt is calculated as follows:
&Delta;d i j = &Delta;Tr i - 1 &CenterDot; q i j &CenterDot; s i j 2 ( s i j - q i j ) ( 2 r i + &Delta;Tr i - 1 ) - &Delta;Tr i &CenterDot; q i j 2 ( s i j - q i j ) ( 2 r i - &Delta;Tr i ) ( i = 2 , 3 , 4... n ; j = 1 , 2 , ... m )
When green light extends, the people total delay increment Delta d of the i-th phase place j entrance drivewayijIt is calculated as follows:
&Delta;d i j = &Delta;Tr i &CenterDot; q i j &CenterDot; s i j 2 ( s i j - q i j ) ( 2 r i + &Delta;Tr i ) - &Delta;Tr i + 1 &CenterDot; q i j 2 ( 2 r i + &Delta;Tr i + 1 &CenterDot; q i j s i j - &Delta;Tr i + 1 ) ( i = 2 , 3 , 4... n ; j = 1 , 2 , ... m )
Determining the Δ Tr of next phase placei+1, first this constraints of the minimum green time of phase place,I.e. equation below: Gmin≤Gi-(ΔTri-ΔTri+1) wherein GiFor i phase place Effective Green Time duration, obtain
Consideration simultaneously can cause non-preferential phase place people total delay DiIncrease amount be Δ Di
Consideration passenger's impression, it is prevented that incur loss through delay and increase too much, the negative effect that public vehicles and public transit vehicle are preferentially caused by reduction tramcar is excessive, sets
When drawing execution red light early disconnected strategy
&Delta;Tr i + 1 ( 2 ) = r i - r i 2 - ( &Sigma; j = 1 m &lsqb; &Delta;Tr i - 1 &CenterDot; q i j &CenterDot; s i j 2 ( s i j - q i j ) ( 2 r i + &Delta;Tr i - 1 ) &CenterDot; ( qs i j &CenterDot; P s + qb i j &CenterDot; P b ) &rsqb; - U &CenterDot; D i &Sigma; j = 1 m &lsqb; q i j ( qs i j &CenterDot; P s + qb i j &CenterDot; P b ) 2 ( s i j - q i j ) &rsqb; )
When performing green light prolongation strategy
IfThenOtherwiseThe like, until being assigned。
The present invention has following Advantageous Effects:
The inventive method for tramcar crossing provide priority pass control method with good conditionsi, the present invention considers non-preferential phase place public vehicles and public transit vehicle incurs loss through delay the increase upper limit, it is achieved thereby that to tramcar priority acccess control, it is ensured that the operational efficiency of tramcar。
The higher limit that public vehicles non-preferential phase place passed through by restriction and public transport are occasioned a delay, reduces the increment of people's total delay of each phase place in crossing as far as possible。First pass through the adjustment of tramcar self speed, reduce the tramcar delay in crossing。Secondly by limiting the upper limit incuring loss through delay increase that the vehicle that non-preferential phase place is current is caused, use green light to postpone each non-preferential Selecting phasing or red light is early disconnected tactful, reduce the impact on single non-preferential phase place。The delay that regular public traffic vehicle is caused by special consideration simultaneously, reduces the increment of people's total delay of each non-preferential phase place in crossing as far as possible。This invention can not only improve the operational efficiency of urban public transport, also promotes the sound development of urban transportation simultaneously。
Accompanying drawing explanation
Fig. 1 is that schematic diagram arranged by intersection vehicles detector;
Fig. 2 is the overview flow chart of a kind of tramcar method for controlling priority considering public transit vehicle;
Fig. 3 is carried out non-preferential phase place duration change schematic diagram during red light early disconnected strategy;
Fig. 4 is carried out green light and extends non-preferential phase place duration change schematic diagram during strategy;
Fig. 5 be red light early disconnected time non-preferential phase place delay increase and reduce schematic diagram, correspond respectively to Fig. 5 (1) and Fig. 5 (2);
When Fig. 6 is green light prolongation, the delay of non-preferential phase place increases and reduces schematic diagram, corresponds respectively to Fig. 6 (1) and Fig. 6 (2)。
Detailed description of the invention
Below in conjunction with accompanying drawing 1 to Fig. 6, the present invention will be further described, and the process that realizes of a kind of tramcar method for controlling priority considering the non-preferential phase place vehicle delay increase upper limit described in present embodiment is:
1), tramcar stroke and speed detector are laid;Before tramcar stop line, rail tram detection device is laid at L place, for detecting the parameters such as the time of advent and the speed of tramcar。Tramcar special lane can be set in main road central authorities, as it is shown in figure 1,。
2), detect tramcar at tramcar entrance driveway and arrive the time T of detectora, it is known that tramcar operational speed range [Vmin,Vmax], the distance between entrance driveway detector and stop line is L;Wherein VminFor tramcar speed of service minima, VmaxFor maximum;
According to formulaV=VmaxOr V=Vmin, then can show that the tramcar window time of advent (time window that prediction vehicle arrives) is [T1,T2];
Tramcar is calculated as follows for the time of advent by formula:
T 1 = T a + L V m a x T 2 = T a + L V m i n
Tramcar is [a, b] without what carry out priority requisition by time window;T represents that tramcar arrives the time of stop line,
RmFor this phase place red light break time the most very early in the morning, GmFor green light maximum extension time, then the moment interval [a+R that tramcar phase place red light is early disconnectedm, a] with green light postpone interval [b, b+Gm];
3) the tramcar window time of advent [T is judged1,T2] with the relation of [a, b], if [T1,T2] ∈ [a, b], then tramcar is without priority requisition, it is possible to normal through;
If T1A T2B or a T1B T2, then tramcar regulates the speed of service, and making time of advent window is [a, T2] or [T1, b], tramcar, normal through crossing, does not need to carry out preferential application, otherwise carries out next step and judges;
4) it is being unsatisfactory for 3) under condition, when electric car is interval for the time of adventOr Time, then crossing signal systems processes the priority requisition of tramcar, enters step 5);Otherwise tramcar can not preferentially pass through;
In formulaRepresent empty set;
5) when red light is early disconnected, the T time of advent is chosen2;When green light postpones, choose the T time of advent1;Calculate red light early disconnected duration Δ Tr=| T2-a | or green light delay duration Δ Tg=| T1-b |;
When implementing red light early disconnected measure, enter 6);
When implementing green light delay policy, enter 7);
6) process priority requisition, take the concrete measures;When performing red light early disconnected strategy, compressing the green time of each phase place, concrete measure is:
From tramcar phase place, previous phase place is sorted successively, it is assumed that the cycle has n phase place, by each phase place sequence number of i labelling, each phase place is implemented red light early disconnected measure;Early the break time is Δ Tr to the red light of the i-th phase placei, early the break time is Δ Tr to the red light of the 1st phase place1=Δ Tr, i=1,2,3 ... n;
Consider the minimum long green light time G of phase place simultaneouslyminThe higher limit U increased is incured loss through delay, it is determined that next phase place red light needs early break time Δ Tr with phase placei+1, it is iterated calculating, enters 8);
7) priority requisition is processed: when performing green light delay policy, compressing the green time of each phase place, concrete measure is:
From performing the phase place that tramcar is preferential, next phase place being sorted successively, it is assumed that the cycle has n phase place, by each phase place sequence number of i labelling, the green extension of the i-th phase place is Δ Tri, the red light prolongation time of the 1st phase place is Δ Tr1=Δ Tg;I=1,2,3 ... n;
Consider the minimum long green light time G of phase place simultaneouslyminThe higher limit U increased is incured loss through delay, it is determined that next phase place green light needs prolongation time Δ Tr with phase placei+1, it is iterated calculating, enters 8);
8) < during n-1, calculate and judge next phase delta Tr meeting ii+1Whether it is zero, if zero, then stop continuing compression;
If Δ Tri+1>0,Then continue to be compressed non-preferential phase place calculating, until Δ Tri+1≤ 0;
9) according to 6) or 7) each non-preferential phase place is sequentially carried out long green light time compression after, as i=n-1, Δ Tri+1> 0, then cannot meet the condition of tramcar priority pass, the priority requisition of electric car should be refused, now tramcar needs to wait that next cycle passes through。
Above-mentioned 6) or 7) in, people's total delay of non-preferential phase place is increased Δ DiComputing formula is as follows:
&Delta;D i = &Sigma; j = 1 m &lsqb; &Delta;d i j ( qs i j &CenterDot; P s + qb i j &CenterDot; P b ) &rsqb; , ( i = 2 , 3 , 4 ... n )
Wherein Δ DiFor i phase place people's total delay increment, Δ dijFor the delay that the vehicle of i phase place j entrance driveway increases, qsijFor the arrival rate of the public vehicles of i phase place j entrance driveway, qbijFor the arrival rate of the regular public traffic vehicle of i phase place j entrance driveway, PsFor the average carrying number of public vehicles, PbFor the average carrying number of public transit vehicle,
The delay D of non-preferential phase placeiIt is calculated as follows:
D i = &Sigma; j = 1 m r i 2 &CenterDot; q i j &CenterDot; s i j 2 ( s i j - q i j ) ( qs i j &CenterDot; P s + qb i j &CenterDot; P b ) , ( i = 2 , 3 , 4 ... n )
Wherein qijFor i phase place j track vehicle arriving rate, sijFor i phase place j track vehicle departure rate, riFor the effective red time of i phase place;
In non-preferential phase place, when red light is early disconnected, the people total delay increment Delta d of the i-th phase place j entrance drivewayijIt is calculated as follows:
&Delta;d i j = &Delta;Tr i - 1 &CenterDot; q i j &CenterDot; s i j 2 ( s i j - q i j ) ( 2 r i + &Delta;Tr i - 1 ) - &Delta;Tr i &CenterDot; q i j 2 ( s i j - q i j ) ( 2 r i - &Delta;Tr i )
( i = 2 , 3 , 4 ... n ; j = 1 , 2 , ... m )
When green light extends, the people total delay increment Delta d of the i-th phase place j entrance drivewayijIt is calculated as follows:
&Delta;d i j = &Delta;Tr i &CenterDot; q i j &CenterDot; s i j 2 ( s i j - q i j ) ( 2 r i + &Delta;Tr i ) - &Delta;Tr i + 1 &CenterDot; q i j 2 ( 2 r i + &Delta;Tr i + 1 &CenterDot; q i j s i j - &Delta;Tr i + 1 ) ( i = 2 , 3 , 4... n ; j = 1 , 2 , ... m )
Determining the Δ Tr of next phase placei+1Time, it is considered to following two condition:
First the minimum green time G of phase place is consideredminThis constraints, i.e. equation below: Gmin≤Gi-(ΔTri-ΔTri+1), wherein GiFor i phase place Effective Green Time duration, obtain
Consideration simultaneously can cause non-preferential phase place people total delay DiIncrease amount be Δ Di;Consideration passenger's impression, it is prevented that incur loss through delay and increase too much, the negative effect that public vehicles and public transit vehicle are preferentially caused by reduction tramcar is excessive, sets
When drawing execution red light early disconnected strategy
&Delta;Tr i + 1 ( 2 ) = r i - r i 2 - ( &Sigma; j = 1 m &lsqb; &Delta;Tr i - 1 &CenterDot; q i j &CenterDot; s i j 2 ( s i j - q i j ) ( 2 r i + &Delta;Tr i - 1 ) &CenterDot; ( qs i j &CenterDot; P s + qb i j &CenterDot; P b ) &rsqb; - U &CenterDot; D i &Sigma; j = 1 m &lsqb; q i j ( qs i j &CenterDot; P s + qb i j &CenterDot; P b ) 2 ( s i j - q i j ) &rsqb; )
When performing green light prolongation strategy
IfThenOtherwiseThe like, until being assigned。
Embodiment: as shown in figures 1 to 6,
Described method specifically performs according to following steps:
1) as it is shown in figure 1, main road central authorities arrange tramcar special lane。
2) before tramcar stop line, rail tram detection device is laid at L place, for detecting the parameters such as the time of advent and the speed of tramcar。
3) the tramcar T time of advent is detected at tramcar entrance drivewaya, according to tramcar operational speed range [Vmin,Vmax], wherein VminFor tramcar speed of service minima, VmaxFor maximum。Tramcar is calculated as follows for the time of advent by formula:
T 1 = T a + L V m a x
T 2 = T a + L V m i n
The time window that prediction vehicle arrives is [T1,T2]。
4) tramcar is [a, b] without what carry out priority requisition by time window。RmFor this phase place red light break time the most very early in the morning, GmFor green light maximum extension time, then interval [b, the b+G that the moment interval [a+Rm, a] that tramcar phase place red light is early disconnected postpones with green lightm]。
5) judging that tramcar preferentially passes through the need of application, process is as follows:
Judge the tramcar window time of advent [T1,T2] with the relation of [a, b]。
[T1,T2] ∈ [a, b], then tramcar is without priority requisition, it is possible to normal through。
If T1A T2B or a T1B T2, then tramcar regulates the speed of service, and making time of advent window is [a, T2] or [T1, b], tramcar, normal through crossing, does not need to carry out preferential application, otherwise carries out next step and judges。Its operational speed range is calculated as follows:
V = L t - T a , ( t = a , b , T 1 , T 2 )
Under being unsatisfactory for above-mentioned condition, when electric car is interval for the time of adventOr Then crossing signal systems processes the priority requisition of tramcar。Otherwise tramcar can not preferentially pass through。
6) when red light is early disconnected, the T time of advent is chosen2;When green light postpones, choose the T time of advent1。Regulate the tramcar speed of service is V simultaneouslyminOr Vmax
7) calculate according to above, calculate red light early disconnected duration Δ Tr or green light and postpone duration Δ Tg。
8) Δ Tr=| T2-a | or Δ Tg=| T1-b|。
9) to implement green light delay policy, green light delay policy step is implemented as follows:
As it is shown on figure 3, from performing the phase place that tramcar is preferential, sort successively (assuming that the cycle has n phase place) to next phase place, with i (i=1,2,3 ... n) each phase place sequence number of labelling。The green extension of the i-th phase place is Δ Tri。The red light prolongation time of the 1st phase place is Δ Tr1=Δ Tg。
First the minimum green time G of constraints phase place is consideredmin≤Gi-(ΔTri-ΔTri+1), wherein GiFor i phase place Effective Green Time duration, obtainConsider that phase place incurs loss through delay the higher limit U increased, it is determined that next phase place green light needs prolongation time Δ Tr simultaneouslyi+1, it is iterated calculating。The higher limit U that wherein phase place delay increases considers that intersection traffic situation and passenger's tolerance limit are set, and takes between 0.1~0.3。
10) in non-preferential phase place, when green light extends, the people total delay increment Delta d of the i-th phase place j entrance drivewayij
It is calculated as follows:
&Delta;d i j = &Delta;Tr i &CenterDot; q i j &CenterDot; s i j 2 ( s i j - q i j ) ( 2 r i + &Delta;Tr i ) - &Delta;Tr i + 1 &CenterDot; q i j 2 ( 2 r i + &Delta;Tr i + 1 &CenterDot; q i j s i j - &Delta;Tr i + 1 ) ( i = 2 , 3 , 4... n ; j = 1 , 2 , ... m )
People's total delay increase computing formula of non-preferential phase place is as follows:
&Delta;D i = &Sigma; j = 1 m &lsqb; &Delta;d i j ( qs i j &CenterDot; P s + qb i j &CenterDot; P b ) &rsqb; , ( i = 2 , 3 , 4 ... n )
Wherein Δ DiFor i phase place people's total delay increment
ΔdijFor the delay that the vehicle of i phase place j entrance driveway increases
qsijArrival rate for the public vehicles of i phase place j entrance driveway
qbijArrival rate for the regular public traffic vehicle of i phase place j entrance driveway
PsFor the average carrying number of public vehicles
PbFor the average carrying number of public transit vehicle
The delay D of non-preferential phase placeiIt is calculated as follows:
D i = &Sigma; j = 1 m r i 2 &CenterDot; q i j &CenterDot; s i j 2 ( s i j - q i j ) ( qs i j &CenterDot; P s + qb i j &CenterDot; P b ) , ( i = 2 , 3 , 4 ... n )
11) consideration passenger impression, it is prevented that incur loss through delay and increase too much, the negative effect that vehicle is preferentially caused by reduction tramcar is excessive, setsDraw
12) ifThenOtherwise
13) < during n-1, calculate and judge next phase delta Tr meeting ii+1Whether it is zero, if zero, then stop continuing compression。
14) if Δ Tri+1> 0, then continue to be compressed non-preferential phase place calculating, until Δ Tri+1≤0。
15) after each non-preferential phase place is sequentially carried out long green light time compression, as i=n-1, Δ Tri+1> 0, then cannot meet the condition of tramcar priority pass, the priority requisition of refusal electric car, tramcar needs wait to pass through。

Claims (2)

1. one kind considers that the tramcar method for controlling priority increasing the upper limit incured loss through delay by non-preferential phase place vehicle, it is characterised in that: the process that realizes of described method is:
1), tramcar stroke and speed detector are laid;
2), detect tramcar at tramcar entrance driveway and arrive the time T of detectora, it is known that tramcar operational speed range [Vmin,Vmax], the distance between entrance driveway detector and stop line is L;
According to formulaV=VmaxOr V=Vmin, then can show that the tramcar window time of advent is [T1,T2];
Tramcar is [a, b] without what carry out priority requisition by time window;T represents that tramcar arrives the time of stop line,
RmFor this phase place red light break time the most very early in the morning, GmFor green light maximum extension time, then the moment interval [a+R that tramcar phase place red light is early disconnectedm, a] with green light postpone interval [b, b+Gm];
3) the tramcar window time of advent [T is judged1,T2] with the relation of [a, b], if [T1,T2] ∈ [a, b], then tramcar is without priority requisition, it is possible to normal through;
If T1A T2B or a T1B T2, then tramcar regulates the speed of service, and making time of advent window is [a, T2] or [T1, b], tramcar, normal through crossing, does not need to carry out preferential application, otherwise carries out next step and judges;
4) it is being unsatisfactory for 3) under condition, when electric car is interval for the time of adventOr Time, then crossing signal systems processes the priority requisition of tramcar, enters step 5);Otherwise tramcar can not preferentially pass through;
Represent empty set;
5) when red light is early disconnected, the T time of advent is chosen2;When green light postpones, choose the T time of advent1;Calculate red light early disconnected duration Δ Tr=| T2-a | or green light delay duration Δ Tg=| T1-b |;
When implementing red light early disconnected measure, enter 6);
When implementing green light delay policy, enter 7);
6) process priority requisition, take the concrete measures;When performing red light early disconnected strategy, compressing the green time of each phase place, concrete measure is:
From tramcar phase place, previous phase place is sorted successively, it is assumed that the cycle has n phase place, by each phase place sequence number of i labelling, each phase place is implemented red light early disconnected measure;Early the break time is Δ Tr to the red light of the i-th phase placei, early the break time is Δ Tr to the red light of the 1st phase place1=Δ Tr, i=1,2,3 ... n;
Consider the minimum long green light time G of phase place simultaneouslyminThe higher limit U increased is incured loss through delay, it is determined that next phase place red light needs early break time Δ Tr with phase placei+1, it is iterated calculating, enters 8);
7) priority requisition is processed: when performing green light delay policy, compressing the green time of each phase place, concrete measure is:
From performing the phase place that tramcar is preferential, next phase place being sorted successively, it is assumed that the cycle has n phase place, by each phase place sequence number of i labelling, the green extension of the i-th phase place is Δ Tri, the red light prolongation time of the 1st phase place is Δ Tr1=Δ Tg;I=1,2,3 ... n;
Consider the minimum long green light time G of phase place simultaneouslyminThe higher limit U increased is incured loss through delay, it is determined that next phase place green light needs prolongation time Δ Tr with phase placei+1, it is iterated calculating, enters 8);
8) when meeting i < n-1, calculate and judge next phase delta Tri+1Whether it is zero, if zero, then stop continuing compression;
If Δ Tri+1> 0, then continue to be compressed non-preferential phase place calculating, until Δ Tri+1≤ 0;
9) according to 6) or 7) each non-preferential phase place is sequentially carried out long green light time compression after, as i=n-1, Δ Tri+1> 0, then cannot meet the condition of tramcar priority pass, should refuse the priority requisition of electric car, and now tramcar needs to wait that next cycle passes through。
2. a kind of tramcar method for controlling priority considering that the increase upper limit incured loss through delay by non-preferential phase place vehicle according to claim 1, it is characterised in that:
Above-mentioned 6) or 7) in, ask for Δ Tri+1Process be:
People's total delay of non-preferential phase place is increased Δ DiComputing formula is as follows:
&Delta;D i = &Sigma; j = 1 m &lsqb; &Delta;d i j ( qs i j &CenterDot; P s + qb i j &CenterDot; P b ) &rsqb; , ( i = 2 , 3 , 4 ... n )
Wherein Δ DiFor i phase place people's total delay increment, Δ dijFor the delay that the vehicle of i phase place j entrance driveway increases, qsijFor the arrival rate of the public vehicles of i phase place j entrance driveway, qbijFor the arrival rate of the regular public traffic vehicle of i phase place j entrance driveway, PsFor the average carrying number of public vehicles, PbFor the average carrying number of public transit vehicle,
The delay D of non-preferential phase placeiIt is calculated as follows:
D i = &Sigma; j = 1 m r i 2 &CenterDot; q i j &CenterDot; s i j 2 ( s i j - q i j ) ( qs i j &CenterDot; P s + qb i j &CenterDot; P b ) , ( i = 2 , 3 , 4 ... n )
Wherein qijFor i phase place j track vehicle arriving rate, sijFor i phase place j track vehicle departure rate, riFor the effective red time of i phase place;
In non-preferential phase place, when red light is early disconnected, the people total delay increment Delta d of the i-th phase place j entrance drivewayijIt is calculated as follows:
&Delta;d i j = &Delta;Tr i - 1 &CenterDot; q i j &CenterDot; s i j 2 ( s i j - q i j ) ( 2 r i + &Delta;Tr i - 1 ) - &Delta;Tr i &CenterDot; q i j 2 ( s i j - q i j ) ( 2 r i - &Delta;Tr i ) ( i = 2 , 3 , 4... n ; j = 1 , 2 , ... m )
When green light extends, the people total delay increment Delta d of the i-th phase place j entrance drivewayijIt is calculated as follows:
&Delta;d i j = &Delta;Tr i &CenterDot; q i j &CenterDot; s i j 2 ( s i j - q i j ) ( 2 r i + &Delta;Tr i ) - &Delta;Tr i + 1 &CenterDot; q i j 2 ( 2 r i + &Delta;Tr i + 1 &CenterDot; q i j s i j - &Delta;Tr i + 1 ) ( i = 2 , 3 , 4... n ; j = 1 , 2 , ... m )
Determining the Δ Tr of next phase placei+1Time, it is considered to following two condition:
First the minimum green time G of phase place is consideredminThis constraints, i.e. equation below: Gmin≤Gi-(ΔTri-ΔTri+1), wherein GiFor i phase place Effective Green Time duration, obtain
Consideration simultaneously can cause non-preferential phase place people total delay DiIncrease amount be Δ Di;Consideration passenger's impression, it is prevented that incur loss through delay and increase too much, the negative effect that public vehicles and public transit vehicle are preferentially caused by reduction tramcar is excessive, sets
When drawing execution red light early disconnected strategy
&Delta;Tr i + 1 ( 2 ) = r i - r i 2 - ( &Sigma; j = 1 m &lsqb; &Delta;Tr i - 1 &CenterDot; q i j &CenterDot; s i j 2 ( s i j - q i j ) ( 2 r i + &Delta;Tr i - 1 ) &CenterDot; ( qs i j &CenterDot; P s + qb i j &CenterDot; P b ) &rsqb; - U &CenterDot; D i &Sigma; j = 1 m &lsqb; q i j ( qs i j &CenterDot; P s + qb i j &CenterDot; P b ) 2 ( s i j - q i j ) &rsqb; )
When performing green light prolongation strategy
IfThenOtherwiseThe like, until being assigned。
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