CN110299015B - Ramp management and control method based on toll station - Google Patents

Ramp management and control method based on toll station Download PDF

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CN110299015B
CN110299015B CN201910597204.0A CN201910597204A CN110299015B CN 110299015 B CN110299015 B CN 110299015B CN 201910597204 A CN201910597204 A CN 201910597204A CN 110299015 B CN110299015 B CN 110299015B
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downstream
occupancy
upstream
ramp
toll station
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CN110299015A (en
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戴昀琦
丁璠
蒋霁琬
谭华春
李汉初
郭瑾
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Southeast University
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Southeast University
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    • G—PHYSICS
    • G08—SIGNALLING
    • G08G—TRAFFIC CONTROL SYSTEMS
    • G08G1/00—Traffic control systems for road vehicles
    • G08G1/07—Controlling traffic signals
    • G08G1/075—Ramp control

Abstract

The invention provides a ramp management and control method based on a toll station. The invention utilizes the known upstream occupancy and downstream occupancy and combines with the hidden layer of the Green basis function to obtain a group of modified weight coefficients, thereby predicting the occupancy of the downstream time period, substituting the occupancy into the ramp regulation calculation formula and calculating the regulation and control time of the ramp in the form of the toll station. The invention is based on the toll station, does not need to add road facilities for reconstruction and construction, and reduces the cost investment. In addition, the invention effectively ensures the occupation rate of the main line, ensures the circulation and prevents the main line from being jammed.

Description

Ramp management and control method based on toll station
Technical Field
The invention relates to a ramp management and control method based on a toll station, and belongs to the technical field of ramp management and control.
Background
Toll stations are facilities used to charge passing vehicles for passage. Toll roads or toll grade crossings must be provided with toll stations. There are generally two types of locations for toll stations: one is directly arranged on a main line, is also called a roadblock type and is mostly used at the starting point and the ending point of a main line toll road section; the other is arranged on a grade crossing road or a connecting line, and is generally used for the industrial grade crossing between main line toll road sections to control the toll of vehicles entering and exiting the main line on the crossed road.
On an expressway, the existing ramp management and control means mostly adopt signal lamp control to carry out a periodic release strategy on vehicles entering a ramp, and a large number of detectors and control equipment need to be additionally arranged on the existing road facility foundation. The toll station is a natural management and control port, and the effect of controlling the flow can be achieved without modifying road facilities. Therefore, a ramp management and control method based on the toll station can be designed based on the toll station.
Disclosure of Invention
In order to solve the existing problems, the invention discloses a ramp management and control method based on a toll station, which is used for controlling the flow.
The above purpose is realized by the following technical scheme:
a ramp management and control method based on a toll station comprises the following steps:
the method comprises the following steps: arranging equipment: a ramp detection coil is arranged at a toll station A point on an entrance ramp, a detection coil is arranged at an upstream end point D point of a main line control area, and a detection coil is arranged at a downstream end point C point of the main line control area;
step two: preparing data: obtaining occupancy situation at toll station A O (t)A(ii) a Obtaining real-time occupancy rate condition O (t) at upstream endpoint D pointupstreamAcquiring the real-time occupancy rate condition O (t) at the C point of the downstream endpointdownstreamAnd occupancy at downstream C point after Δ t O (t + Δ t)downstream(ii) a Setting the average moving time consumption from a toll station A point to a ramp port B point to be delta t; the number of the open passage channels of the current toll station is n;
step three: obtaining weight distribution: intercepting an upstream occupancy rate O in a t-sigma time period by taking sigma as a time window lengthupstreamData and divide it into n equal parts Oupsrteam＝{O(1)upstream,O(2)upstream,…,O(i)upstream,…,O(n)upstreamObtaining correction offset by the hidden layers of n Green basis functions and multiplying by corresponding weight coefficients w (i) respectively, and obtaining the correction offset by the downstream occupancy rate O (t) at the time tdownstreamLinear addition is performed to obtain the predicted downstream occupancy at time t + Δ t
Figure GDA0002426503920000011
By comparing the actual measured occupancy O (t Δ t) at the downstream endpoint C at time t + Δ tdownstreamCorrecting the weight coefficient matrix w for multiple times, and finally determining a weight coefficient matrix w allocation scheme, wherein w (0) + w (1) + w (2) + … + w (n) ═ 1; w (i) represents the corresponding ith upstream occupancy rate O (i)upstreamThe weight of the data in the algorithm training process; w (0) represents the downstream occupancy at time t O (t)downstreamWeights in the algorithm training process;
step four: obtaining a calculation mode: the method for calculating the real-time occupancy of the corrected downstream endpoint C point at the time t + delta t comprises the following steps:
Figure GDA0002426503920000021
Figure GDA0002426503920000022
wherein
Figure GDA0002426503920000023
σiRepresents O (i)upstreamThe width of (d);
step five: and (3) calculating the mediation rate: will be calculated
Figure GDA0002426503920000024
Substituted type
Figure GDA0002426503920000025
Figure GDA0002426503920000026
O in (1)out(k-1) obtaining a ramp mediation rate; wherein r iskThe ramp regulation rate calculated in the kth control period; r is(k-1)Is the ramp regulation rate in the (k-1) th control period; the mediation rate is the duration of green light in a control period, and the unit is s; kRIs a parameter that has the property of being calibrated,
Figure GDA0002426503920000027
is the expected occupancy downstream of the main line, Oout(k-1) is the downstream actual measurement occupancy of the main line in the (k-1) th control period;
step six: and (3) regulating: according to the obtained rkAnd (4) adjusting the rate, controlling the total passing time of the toll station in an adjusting period, and performing polling opening.
The ramp management and control method based on the toll station has the expected occupancy in the fifth step
Figure GDA0002426503920000028
Is in the interval of [0.18,0.31 ]]。
The ramp management and control method based on the toll station comprises the step five of calibrating the parameter K with the calibration propertyRIn the range of [70,200]。
And in the fifth step, the range of one control period is 40 s-5 min.
Has the advantages that:
the invention designs a correct calculation method for predicting the downstream occupancy of the toll station in the future time period based on the fact that the toll station is a natural management and control port through the real-time occupancy of the toll station, thereby managing and controlling the toll station. The invention is based on the toll station, does not need to add road facilities for reconstruction and construction, and reduces the cost investment. In addition, the invention effectively ensures the occupation rate of the main line, ensures the circulation and prevents the main line from being jammed.
Drawings
FIG. 1 is a road alignment diagram illustrating a road segment to which the present invention is applied;
FIG. 2 is a schematic diagram of the algorithm of the present invention;
FIG. 3 is a schematic diagram showing the comparison of the number of parking before and after the application of the algorithm of the present invention;
FIG. 4 is a schematic diagram showing a comparison of travel times before and after application of the algorithm of the present invention;
FIG. 5 is a schematic diagram showing the comparison of vehicle delays before and after application of the algorithm of the present invention.
Detailed Description
A ramp management and control method based on a toll station comprises the following steps:
the method comprises the following steps: arranging equipment: as shown in fig. 1, a ramp detection coil is arranged at a toll station point a on an entrance ramp, a detection coil is arranged at an upstream end point D of a main line control area, and a detection coil is arranged at a downstream end point C of the main line control area;
step two: preparing data: obtaining occupancy situation at toll station A O (t)A(ii) a Obtaining real-time occupancy rate condition O (t) at upstream endpoint D pointupstreamAcquiring the real-time occupancy rate condition O (t) at the C point of the downstream endpointdownstreamAnd occupancy at downstream C point after Δ t O (t + Δ t)downstteam(ii) a Setting the average moving time consumption from a toll station A point to a ramp port B point to be delta t; the number of the open passage channels of the current toll station is n;
step three: obtaining weight distribution: intercepting upstream occupation in t-sigma time period by taking sigma as time window lengthSpecific ratio of OupstreamData and divide it into n equal parts Oupstream＝{O(1)upstream,O(2)upstream,…,O(i)upstream,…,O(n)upstreamObtaining correction offset by the hidden layers of n Green basis functions and multiplying by corresponding weight coefficients w (i) respectively, and obtaining the correction offset by the downstream occupancy rate O (t) at the time tdownstreamLinear addition is performed to obtain the predicted downstream occupancy at time t + Δ t
Figure GDA0002426503920000031
By comparing the actual measured occupancy rate O (t + Δ t) at the downstream endpoint C at time t + Δ tdownstreamCorrecting the weight coefficient matrix w for multiple times, and finally determining a weight coefficient matrix w allocation scheme, wherein w (0) + w (1) + w (2) + … + w (n) ═ 1; w (i) represents the corresponding ith upstream occupancy rate O (i)upstreamThe weight of the data in the algorithm training process; w (0) represents the downstream occupancy at time t O (t)downstreamWeights in the algorithm training process;
step four: obtaining a calculation mode: the method for calculating the real-time occupancy of the corrected downstream endpoint C point at the time t + delta t comprises the following steps:
Figure GDA0002426503920000032
Figure GDA0002426503920000033
wherein
Figure GDA0002426503920000034
σiRepresents O (i)upstreamThe width of (d);
step five: and (3) calculating the mediation rate: will be calculated
Figure GDA0002426503920000035
Substituted type
Figure GDA0002426503920000036
Figure GDA0002426503920000037
O in (1)out(k-1) obtaining a ramp mediation rate; wherein r iskThe ramp regulation rate calculated in the kth control period; r is(k-1)Is the ramp regulation rate in the (k-1) th control period; the mediation rate is the duration of green light in a control period, and the unit is s; kRIs a parameter that has the property of being calibrated,
Figure GDA0002426503920000038
is the expected occupancy downstream of the main line, Oout(k-1) is the downstream actual measurement occupancy of the main line in the (k-1) th control period;
step six: and (3) regulating: according to the obtained rkAnd (4) adjusting the rate, controlling the total passing time of the toll station in an adjusting period, and performing polling opening.
The ramp management and control method based on the toll station has the expected occupancy in the fifth step
Figure GDA0002426503920000041
Is in the interval of [0.18,0.31 ]]。
The ramp management and control method based on the toll station comprises the step five of calibrating the parameter K with the calibration propertyRIn the range of [70,200]。
And in the fifth step, the range of one control period is 40 s-5 min.
The specific implementation case is as follows:
other features, characteristics and advantages of the invention will become more apparent from the detailed description of the embodiments of the invention, given by way of example, with reference to the accompanying drawings, of the interchange of the Wuning highway tin-free airport.
The interchange of the Wuning expressway Wuxi airport is located in the new south of Wuxi city, where the Wuning expressway Wuxi and the new rhyme road meet. As shown in fig. 1, a toll station is arranged at the point a, and a check-in coil is arranged to detect the ramp occupancy. And obtaining the corresponding ramp regulation rate by comparing the predicted occupancy rate at the point C of the downstream end point of the main line with the actual expected occupancy rate.
A simulation road network is constructed based on an actual road network, survey OD data, a critical occupancy and a set period are input, a simulation experiment is carried out, and simulation time is 3600 s. The specific parameters are as follows:
KR＝70veh·h-1
Figure GDA0002426503920000042
C＝40s
the simulation experiment takes travel time, parking times and vehicle delay as indexes, control measures are adopted to be compared with non-control measures, and simulation results are shown in figures 3, 4 and 5.
It should be noted that the above embodiments are only used for illustrating the structure and the working effect of the present invention, and are not used for limiting the protection scope of the present invention. Modifications and adaptations to the above-described embodiments may occur to one skilled in the art without departing from the spirit and scope of the present invention and are intended to be covered by the following claims.

Claims (4)

1. A ramp management and control method based on a toll station is characterized in that: the method comprises the following steps:
the method comprises the following steps: arranging equipment: a ramp detection coil is arranged at a toll station A point on an entrance ramp, a detection coil is arranged at an upstream end point D point of a main line control area, and a detection coil is arranged at a downstream end point C point of the main line control area;
step two: preparing data: obtaining occupancy situation at toll station A O (t)A(ii) a Obtaining real-time occupancy rate condition O (t) at upstream endpoint D pointupstreamAcquiring the real-time occupancy rate condition O (t) at the C point of the downstream endpointdownstreamAnd occupancy at downstream C point after Δ t O (t + Δ t)downstream(ii) a Setting the average moving time consumption from a toll station A point to a ramp port B point to be delta t; the number of the open passage channels of the current toll station is n;
step three: obtaining weight distribution: intercepting an upstream occupancy rate O in a t-sigma time period by taking sigma as a time window lengthupstreamData and divide it into n equal parts Oupstream＝{O(1)upstream,O(2)upstream,…,O(i)upstream,…,O(n)upstreamObtaining correction offset by the hidden layers of n Green basis functions and multiplying by corresponding weight coefficients w (i) respectively, and obtaining the correction offset by the downstream occupancy rate O (t) at the time tdownstreamLinear addition is carried out to obtain the predicted downstream occupancy rate of the downstream endpoint C point at the time of t + delta t
Figure FDA0002426503910000016
By comparing the actual measured occupancy rate O (t + Δ t) at the downstream endpoint C at time t + Δ tdownstreamCorrecting the weight coefficient matrix w for multiple times, and finally determining a weight coefficient matrix w allocation scheme, wherein w (0) + w (1) + w (2) + … + w (n) ═ 1; w (i) represents the corresponding ith upstream occupancy rate O (i)upstreamThe weight of the data in the algorithm training process; w (0) represents the downstream occupancy at time t O (t)downstreamWeights in the algorithm training process;
step four: obtaining a calculation mode: the method for calculating the real-time occupancy of the corrected downstream endpoint C point at the time t + delta t comprises the following steps:
Figure FDA0002426503910000011
wherein
Figure FDA0002426503910000012
σiRepresents O (i)upstreamThe width of (d);
step five: and (3) calculating the mediation rate: will be calculated
Figure FDA0002426503910000013
Substituted type
Figure FDA0002426503910000014
Figure FDA0002426503910000015
O in (1)out(k-1)Obtaining the ramp regulation rate; wherein r iskThe ramp regulation rate calculated in the kth control period; r is(k-1)Is the ramp regulation rate in the (k-1) th control period; the mediation rate is the duration of green light in a control period, and the unit is s; kRIs a parameter that has the property of being calibrated,
Figure FDA0002426503910000017
is the expected occupancy downstream of the main line, Oout(k-1) is the downstream actual measurement occupancy of the main line in the (k-1) th control period;
step six: and (3) regulating: according to the obtained rkAnd (4) adjusting the rate, controlling the total passing time of the toll station in an adjusting period, and performing polling opening.
2. The toll station-based ramp management and control method according to claim 1, wherein: the expected occupancy rate stated in step five
Figure FDA0002426503910000021
Is in the interval of [0.18,0.31 ]]。
3. The toll station-based ramp management and control method according to claim 1, wherein: parameter K with calibration properties as described in step fiveRIn the range of [70,200]。
4. The toll station-based ramp management and control method according to claim 1, wherein: and the range of one control period in the step five is 40 s-5 min.
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