CN104332061A - Green wave setting method for realizing streetcar interstation green-wave passage - Google Patents
Green wave setting method for realizing streetcar interstation green-wave passage Download PDFInfo
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- CN104332061A CN104332061A CN201410564285.1A CN201410564285A CN104332061A CN 104332061 A CN104332061 A CN 104332061A CN 201410564285 A CN201410564285 A CN 201410564285A CN 104332061 A CN104332061 A CN 104332061A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B61—RAILWAYS
- B61L—GUIDING RAILWAY TRAFFIC; ENSURING THE SAFETY OF RAILWAY TRAFFIC
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Abstract
The invention discloses a green wave setting method for realizing streetcar interstation green-wave passage. The method comprises the following steps: collecting data of intersections along the line of streetcars and streetcar running data; determining an intersection timing plan according to the data of the intersections along the line of the streetcars and traffic flow of each intersection; setting up direction and car departing time, and determining time when the streetcars in up direction reach each intersection; determining streetcar pass phase position green light midpoint time and the car departing time of the streetcars in down direction; determining time of the streetcars in down direction reaching each intersection; and calculating the difference between the time of the streetcars in down direction reaching each intersection and the green light midpoint time, and determining time difference [delta]x of each intersection; and according to the time difference, adjusting the timing scheme of the intersection. The method prevents unnecessary parking of the streetcars at the intersections, thereby improving running efficiency of the lines; and with electric car running induction technology being combined, the streetcars are allowed to run according to set parameters, and punctuality rate of the streetcar is improved.
Description
Technical field:
The present invention to pass through green light start-up time of phase place and tramcar travel speed at the berthing time of bus stop, tramcar by adjusting tramcar in predetermined adjustable extent, realize tramcar two-way green wave to pass through, belong to urban public transport transportation management and control field.
Background technology:
Greatly develop urban public transport, improve Public Transport Service situation, promote go-outside for civilian by bus share rate, build the Traffic Development system of taking as the leading factor with public transport, to alleviating urban traffic blocking, improving resident's living environment, ensureing that the quick sustainable development in city is significant.Present stage, on the one hand, due to the continuous expansion of city size, the increase day by day of resident trip distance, city tide flow phenomenon highlights day by day; On the other hand, regular public traffic system has the shortcomings such as punctuality rate is low, comfort level is less, freight volume is little, and therefore, regular public traffic cannot meet growing bus trip demand.Tramcar is as the public transport mode of a kind of " novel ", and relative regular public traffic, has the advantages such as higher comfort level, more large conveying quantity, be more and more subject to the favor of urban construction, managerial personnel due to it.
Be different from the subway in independent operating space, street railway often intersects with urban highway traffic, and current demand often clashes.Being controlled to include Collaborative Control category in road traffic control by tramcar is the effective ladder of management of one guaranteed tramcar travelling speed, improve tramcar operational efficiency, increase tramcar punctuality rate.The green ripple method to set up that the green ripple of a kind of tramcar proposed by the present invention is current, in conjunction with the inductive technology in tramcar operational process, effectively can guarantee that tramcar plays the transport advantage of public transport Large Copacity, high-level efficiency, low energy consumption, significantly promote the load-bearing capacity of city bus.
Summary of the invention:
Goal of the invention: for improving tramcar running environment, improving tramcar overall trip speed, increasing tramcar operation punctuality rate, the invention provides a kind of green ripple method to set up realizing the green ripple of tramcar and pass through.
Technical scheme: in order to realize foregoing invention object, the technical solution used in the present invention is:
Realize the green ripple method to set up that the green ripple of tramcar is current, it is characterized in that, comprise the following steps:
(A), street railway crossing along the line data, tramcar operation data is gathered; Wherein, crossing along the line data comprise crossing and respectively flow to the volume of traffic, crossing form and canalization and physical dimension; Tramcar operation data comprises length of wagon, road section length, bus stop berthing time and runs fluctuation range, travel speed, acceleration and retarded velocity;
(B), according to the street railway crossing along the line data in step (A), crossing timing scheme is determined according to the volume of traffic of each crossing;
(C) the tramcar operation data, in integrating step (A) and the crossing timing scheme in step (B), arrange up direction and frequency, determine that up tramcar arrives the moment of each crossing;
(D) tramcar operation data, the crossing timing scheme in step (B) and the tramcar in step (C), in integrating step (A) reach the moment of each crossing, determine that tramcar passes through the green light mid point moment of phase place and the frequency of down direction tramcar;
(E) the tramcar operation data, in integrating step (A) and the down direction tramcar frequency in step (D), determine that down direction tramcar arrives each crossing moment;
(F) the green light mid point, by the down direction tramcar in step (E) arrived in each crossing moment and step (D) is poor, determines the time difference δ of each crossing
x;
(G), according to time difference, adjustment crossing timing scheme: first in determining step (F), whether the time difference of all crossings is all less than the current duration of permission, when the time difference of all crossings be all not less than allow current duration time, then adjust down direction frequency, travelling speed and berthing time, the time difference of all crossings is all less than and allows current duration; Then according to time difference, determine the adjustment amount in green light mid point moment, and determine final street lamp Startup time and green light finish time.
Described step (B) comprises the following steps:
(B1), according to Intersection Traffic Volume, Robert Webster method is adopted to calculate intersection signal cycle duration, tramcar phase place long green light time; If the phase place of not letting pass with tramcar, need arrange tramcar dedicated phase simultaneously;
(B2), according to tramcar line length, length of wagon and crossing ruuning situation in crossing, the shortest transit time of tramcar in crossing is determined;
(B3), compare tramcar phase place long green light time and the shortest transit time, if long green light time is less than the shortest transit time, then extends phase place long green light time to the shortest transit time, and adjust signal period duration; Otherwise, do not adjust;
(B4), repeat step (B1), (B2) and (B3) determine tramcar all intersection signal timings along the line, chooses the maximum cycle as common period, unifies other intersection signal timing scheme.
Described step (C) comprises the following steps:
(C1), using direction less for the volume of traffic as electric car up direction, if up frequency is T
send;
(C2), total berthing time t is calculated
s: t
s=Σ t
si, i=1,2 ..., m, t
sifor up direction tramcar is at the berthing time of i-th bus stop, m is the bus stop number between the starting station and target crossing x, x=1,2 ..., q;
(C3), section overall travel time t:t=Σ L is calculated
j/ V
j, j=1,2 ..., n, j are section numbering, and n is the section number between the starting station and target crossing x, L
jfor the length of section j, V
jfor the average overall travel speed of section j;
(C4), determine that tramcar arrives the moment T of target crossing x
x: T
x=T
send+ t
s+ t.
Described step (D) comprises the following steps:
(D1) the tramcar phase place green light mid point t of crossing x, is determined
midx: t
midx=T
x+ kC
x, T
xfor up tramcar arrives the moment of crossing x, C
xfor the cycle duration of crossing x, k is integer;
(D2) tramcar down direction frequency is calculated
t
midqfor the green light mid point moment of last crossing of up direction q, L
qfor the distance between the descending starting station and crossing q,
for with L
qcorresponding average overall travel speed.
Described step (E) comprises the following steps:
(E1), total berthing time is calculated
for descending tramcar is at the berthing time of bus stop i,
for the bus stop number between the descending starting station and target crossing x;
(E2), section overall travel time is calculated
j is section numbering,
for the section number between the descending starting station and target crossing x,
for the length of section j,
for the average overall travel speed that section j is corresponding;
(E3), determine that tramcar arrives the moment of target crossing x
Described step (F) comprises the following steps:
(F1) the time difference δ that descending electric car arrives crossing moment and green light mid point, is calculated
x:
δ
x∈ (-C
x/ 2, C
x/ 2];
(F2) the current duration R of permission, is calculated
ex: R
ex=t
x-t
tx, computing time radius R
x=R
ex/ 2, wherein t
xfor crossing x electric car passes through phase place long green light time, t
txfor tramcar is at the shortest transit time of crossing x.
Described step (G) comprises the following steps:
(G1) if
then this crossing is adjusted to δ
x∈ [-R
ex, R
ex], the concrete grammar of adjustment is: access time differs from the crossing with the maximum absolute value of mid point moment difference, by adjustment down direction frequency, this value is diminished; From down direction first crossing, judge whether it meets δ
x∈ [-R
ex, R
ex], if do not meet, adopt travel speed, the berthing time of enumerative technique adjustment upstream, crossing adjacent segments, till meeting the demands; If meet, next crossing is judged; If all adjustment all cannot meet, then reset signal controling parameters;
(G2) if
time, then do not adjust the green light start-up time of crossing; When
time, the green light start-up time of adjustment crossing, the method for adjustment is: if δ
x> 0, then move δ by the former green light mid point moment along time shaft backward
x/ 2; If δ
xthe former green light mid point moment moves forward along time shaft by < 0 | δ
x|/2;
(G3), determine that each crossing tramcar passes through the green light Startup time of phase place and green light finish time.
Beneficial effect: the inventive method can effectively avoid tramcar travel speed to occur fluctuating widely, and adds the comfort level of tramcar; Avoid tramcar to produce unnecessary parking in crossing, improve the operational efficiency of circuit; Run inductive technology in conjunction with electric car, guarantee that tramcar runs according to setting operational parameter, improve the punctuality rate of tramcar; Meanwhile, the present invention, to improving Level-of-Services of Public Transit, improves public transportation mode share, and carrying out country, to first develop the policy of public transport significant.
Accompanying drawing illustrates:
Fig. 1 is the basic flow sheet of the inventive method;
Fig. 2 is certain street railway bus stop and the crossing along the line position view of the inventive method;
M-distance map when Fig. 3 is certain tramcar two way of the inventive method.
Embodiment:
Below in conjunction with accompanying drawing, the present invention will be further described:
Be illustrated in figure 1 a kind of basic flow sheet realizing the green ripple method to set up that the green ripple of tramcar passes through, illustrate the inventive method further below in conjunction with example.
(A) street railway crossing along the line data, tramcar operation data is gathered;
In this step, tramcar crossing along the line data comprise crossing and respectively flow to the volume of traffic, crossing form and canalization, physical dimension; Tramcar operation data comprises length of wagon, road section length, bus stop berthing time and runs fluctuation range, travel speed, acceleration, retarded velocity etc.
Street railway crossing along the line data can be obtained by traffic control department and on-site inspection; Tramcar operation data can be obtained by the consulting of tramcar company.Position relationship between tramcar bus stop and crossing is shown in Fig. 2.Wherein, bus stop 4 arranges the stop line position of crossing 5.
The basic berthing time (meeting the duration of passenger's upper and lower electric car needs) of each bus stop is identical, is 30s, and bus stop shifts to an earlier date or the delayed time of dispatching a car all is set to 5s; Therefore, each station berthing time allowed band is (25,35).The best travel speed that electric car runs is 30km/h, and operation top speed and minimum speed are respectively 50km/h and 10km/h, and acceleration and retarded velocity are respectively 1.0m/s
2and 1.2m/s
2.Crossing, tramcar craspedodrome direction width is 20m, electric car vehicle commander 30m.
(B) crossing timing scheme is determined
(a1) according to the volume of traffic of each crossing, adopt Robert Webster signal timing dial method conventional in traffic signalization, calculate the long green light time of the cycle duration of each crossing, each phase place, result of calculation is in table 1.
The initial timing parameter of each signalized intersections of table 1
Note: phase place one to be passed through phase place for electric car, and phase place two is the left turn phase on trolley line, and phase place three is the straight left phase place with trolley line vertical direction.
(a2) according to tramcar crossing travelling speed, length of wagon and crossing size, the shortest time of tramcar through each crossing demand is determined, i.e. the shortest long green light time of tramcar phase place.Tramcar from bus stop with 1.0m/s
2the distance that acceleration accelerates to needed for 30km/h is about 35m, if therefore downstream intersection is apart from bus stop more than 35m, then tramcar can with 30km/h by this crossing.
For crossing 5, electric car bus stop is arranged on parking spot place, crossing 5, and therefore electric car by 50m (20 m+30m) apart from interior front 35m is being with 1.0m/s from initial velocity 0
2acceleration gives it the gun, and rear 15m at the uniform velocity travels with 30km/h, needs altogether about 10s.
By that analogy, first and last station 2 is arrived for up direction with first and last station 1, first and last station 2 is down direction to first and last station 1, and calculate the shortest long green light time of uplink and downlink direction electric car by each crossing respectively, the shortest long green light time of higher value as this crossing is got in same crossing.The shortest long green light time of tramcar phase place of each crossing is in table 2.
The shortest long green light time of table 2 each crossing tramcar phase place
Deck watch 1 and table 2 relevant parameter, find that the electric car phase place long green light time of each crossing all meets the shortest long green light time, therefore each intersection signal timing wouldn't adjust.
(a2) the peak signal cycle is chosen as common period, by other not common cycle stretch-outs to common period.The difference extended is assigned in each phase place by green light displaying ratio, and the timing parameter after the adjustment of each crossing is in table 3.
Timing parameter after the first time adjustment of table 3 each signalized intersections
(C) determine up direction and frequency thereof, calculate the moment that up tramcar arrives each crossing.
(a1) up direction that the direction arriving first and last station 2 with first and last station 1 is run for tramcar, the down direction that the direction arriving first and last station 1 with first and last station 2 is run for tramcar; Choose the frequency of 8:00:00 as first and last station 1;
(a2) according to the operation characteristic of tramcar in each section, the running time in each section is calculated.Each link travel time is in table 4.
Table 4 tramcar each section working time
(a3) according to the frequency of tramcar up direction, link travel time and bus stop berthing time, calculate the moment that up direction tramcar reaches each crossing, the results are shown in Table 5.
Table 5 uplink and downlink direction tramcar arrives the moment of each crossing
| Due in | Up direction | Down direction | Due in | Up direction | Down direction |
| Crossing 1 | 8:02:16 | 8:19:57 | Crossing 5 | 8:08:04 | 8:14:07 |
| Crossing 2 | 8:03:42 | 8:18:31 | Crossing 6 | 8:09:15 | 8:12:56 |
| Crossing 3 | 8:04:19 | 8:17:54 | Crossing 7 | 8:09:49 | 8:12:22 |
| Crossing 4 | 8:06:02 | 8:16:10 | Crossing 8 | 8:11:05 | 8:11:05 |
(D) determine that each crossing tramcar passes through the phase place green light mid point moment, tentatively determine down direction tramcar frequency.
(a1) for crossing 8, the moment that up direction arrives this crossing is 8:11:05, and therefore the green light mid point moment of this crossing is 8:11:05+90k, and wherein k is integer;
(a2) supposition down direction vehicle arrives the moment of crossing 8 is 8:11:05, in conjunction with the running time (31s) of first and last station 2 to crossing 8, determines that down direction frequency is 8:10:34;
(E) according to down direction tramcar frequency, link travel time and bus stop berthing time, the moment that down direction tramcar arrives each crossing is calculated.For crossing 7, be 8:10:34+31+25+30+21=8:12:22 time electric car arrives this crossing, result of calculation is in table 5.
(F) determine that tramcar phase place green light mid point and down direction tramcar arrive this crossing time difference.Specific practice is as follows: in the set in green light mid point moment, find the green light mid point moment nearest with due in apart, then deduct due in this green light mid point moment, simultaneously stet.
For crossing 3, it is 8:17:54 that down direction electric car reaches this crossing moment, and found by search, green light mid point nearest in crossing 3 is 8:17:49, and therefore difference is-5s, represents in table 7 with (5).If result of calculation is positive number, directly insert relevant position in table 7.
(G) according to time difference, parameter adjustment.By comparing time difference and allowing current duration, adjustment down direction frequency, travelling speed and berthing time, make the time difference of all crossings all be less than and allow current duration; Then according to the relation of time difference and time radius, determine the adjustment amount in green light mid point moment, and determine final street lamp Startup time and green light finish time, adjustment the results are shown in Table 8.
According to the operational factor in table 6 and table 8, green light signals Startup time and finish time, be depicted as tramcar time chart, see Fig. 3.
Finally in conjunction with the signal period of tramcar demand of passenger transport and crossing, formulate tramcar departure time-table, for departure interval 3min, tramcar up-downgoing frequency is as shown in table 9.
Table 9 uplink and downlink tramcar departure time-table
| Train number | Up direction | Down direction | Train number | Up direction | Down direction |
| The first bus | 8:00:00 | 7:58:59 | 5th class | 8:12:00 | 8:10:59 |
| Back shift | 8:03:00 | 8:01:59 | 6th class | 8:15:00 | 8:13:59 |
| Midnight shift | 8:06:00 | 8:04:59 | 7th class | 8:18:00 | 8:16:59 |
| Fourth Shift | 8:09:00 | 8:07:59 | 8th class | 8:21:00 | 8:19:59 |
Claims (7)
1. realize the green ripple method to set up that the green ripple of tramcar is current, it is characterized in that, comprise the following steps:
(A), street railway crossing along the line data, tramcar operation data is gathered; Wherein, crossing along the line data comprise crossing and respectively flow to the volume of traffic, crossing form and canalization and physical dimension; Tramcar operation data comprises length of wagon, road section length, bus stop berthing time and runs fluctuation range, travel speed, acceleration and retarded velocity;
(B), according to the street railway crossing along the line data in step (A), crossing timing scheme is determined according to the volume of traffic of each crossing;
(C) the tramcar operation data, in integrating step (A) and the crossing timing scheme in step (B), arrange up direction and frequency, determine that up tramcar arrives the moment of each crossing;
(D) tramcar operation data, the crossing timing scheme in step (B) and the tramcar in step (C), in integrating step (A) reach the moment of each crossing, determine that tramcar passes through the green light mid point moment of phase place and the frequency of down direction tramcar;
(E) the tramcar operation data, in integrating step (A) and the down direction tramcar frequency in step (D), determine that down direction tramcar arrives each crossing moment;
(F) the green light mid point, by the down direction tramcar in step (E) arrived in each crossing moment and step (D) is poor, determines the time difference δ of each crossing
x;
(G), according to time difference, adjustment crossing timing scheme: first in determining step (F), whether the time difference of all crossings is all less than the current duration of permission, when the time difference of all crossings be all not less than allow current duration time, then adjust down direction frequency, travelling speed and berthing time, the time difference of all crossings is all less than and allows current duration; Then according to time difference, determine the adjustment amount in green light mid point moment, and determine final street lamp Startup time and green light finish time.
2. a kind of green ripple method to set up realizing the green ripple of tramcar and pass through according to claim 1, is characterized in that: described step (B) comprises the following steps:
(B1), according to Intersection Traffic Volume, Robert Webster method is adopted to calculate intersection signal cycle duration, tramcar phase place long green light time; If the phase place of not letting pass with tramcar, need arrange tramcar dedicated phase simultaneously;
(B2), according to tramcar line length, length of wagon and crossing ruuning situation in crossing, the shortest transit time of tramcar in crossing is determined;
(B3), compare tramcar phase place long green light time and the shortest transit time, if long green light time is less than the shortest transit time, then extends phase place long green light time to the shortest transit time, and adjust signal period duration; Otherwise, do not adjust;
(B4), repeat step (B1), (B2) and (B3) determine tramcar all intersection signal timings along the line, chooses the maximum cycle as common period, unifies other intersection signal timing scheme.
3. a kind of green ripple method to set up realizing the green ripple of tramcar and pass through according to claim 1, is characterized in that: described step (C) comprises the following steps:
(C1), using direction less for the volume of traffic as electric car up direction, if up frequency is T
send;
(C2), total berthing time t is calculated
s:
t
sifor up direction tramcar is at the berthing time of i-th bus stop, m is the bus stop number between the starting station and target crossing x, x=1,2 ..., q;
(C3), section overall travel time t is calculated:
j is section numbering, and n is the section number between the starting station and target crossing x, L
jfor the length of section j, V
jfor the average overall travel speed of section j;
(C4), determine that tramcar arrives the moment T of target crossing x
x: T
x=T
send+ t
s+ t.
4. a kind of green ripple method to set up realizing the green ripple of tramcar and pass through according to claim 3, is characterized in that: described step (D) comprises the following steps:
(D1) the tramcar phase place green light mid point t of crossing x, is determined
midx: t
midx=T
x+ kC
x, T
xfor up tramcar arrives the moment of crossing x, C
xfor the cycle duration of crossing x, k is integer;
(D2) tramcar down direction frequency is calculated
t
midqfor the green light mid point moment of last crossing of up direction q, L
qfor the distance between the descending starting station and crossing q,
for with L
qcorresponding average overall travel speed.
5. a kind of green ripple method to set up realizing the green ripple of tramcar and pass through according to claim 4, is characterized in that: described step (E) comprises the following steps:
(E1), total berthing time is calculated
for descending tramcar is at the berthing time of bus stop i,
for the bus stop number between the descending starting station and target crossing x;
(E2), section overall travel time is calculated
j is section numbering,
for the section number between the descending starting station and target crossing x,
for the length of section j,
for the average overall travel speed that section j is corresponding;
(E3), determine that tramcar arrives the moment of target crossing x
6. according to claim 5ly a kind ofly realize the current green ripple method to set up of green ripple between tram, it is characterized in that: described step (F) comprises the following steps:
(F1) the time difference δ that descending electric car arrives crossing moment and green light mid point, is calculated
x:
(F2) the current duration R of permission, is calculated
ex: R
ex=t
x-t
tx, computing time radius R
x=R
ex/ 2, wherein t
xfor crossing x electric car passes through phase place long green light time, t
txfor tramcar is at the shortest transit time of crossing x.
7. according to claim 6ly a kind ofly realize the current green ripple method to set up of green ripple between tram, it is characterized in that: described step (G) comprises the following steps:
(G1) if
then this crossing is adjusted to δ
x∈ [-R
ex, R
ex], the concrete grammar of adjustment is: access time differs from the crossing with the maximum absolute value of mid point moment difference, by adjustment down direction frequency, this value is diminished; From down direction first crossing, judge whether it meets δ
x∈ [-R
ex, R
ex], if do not meet, adopt travel speed, the berthing time of enumerative technique adjustment upstream, crossing adjacent segments, till meeting the demands; If meet, next crossing is judged; If all adjustment all cannot meet, then reset signal controling parameters;
(G2) if
time, then do not adjust the green light start-up time of crossing; When
time, the green light start-up time of adjustment crossing, the method for adjustment is: if δ
x> 0, then move δ by the former green light mid point moment along time shaft backward
x/ 2; If δ
xthe former green light mid point moment moves forward along time shaft by < 0 | δ
x|/2;
(G3), determine that each crossing tramcar passes through the green light Startup time of phase place and green light finish time.
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