CN110738844A - -type highway maintenance operation area stepped variable speed limit control method - Google Patents

-type highway maintenance operation area stepped variable speed limit control method Download PDF

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CN110738844A
CN110738844A CN201910881671.6A CN201910881671A CN110738844A CN 110738844 A CN110738844 A CN 110738844A CN 201910881671 A CN201910881671 A CN 201910881671A CN 110738844 A CN110738844 A CN 110738844A
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speed limit
variable speed
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maintenance operation
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葛慧敏
杨友森
夏然
黄明月
孙辉
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Jiangsu University
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Jiangsu University
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    • G—PHYSICS
    • G08—SIGNALLING
    • G08G—TRAFFIC CONTROL SYSTEMS
    • G08G1/00—Traffic control systems for road vehicles
    • G08G1/01—Detecting movement of traffic to be counted or controlled
    • G08G1/0104—Measuring and analyzing of parameters relative to traffic conditions
    • G08G1/0125—Traffic data processing
    • G—PHYSICS
    • G08—SIGNALLING
    • G08G—TRAFFIC CONTROL SYSTEMS
    • G08G1/00—Traffic control systems for road vehicles
    • G08G1/01—Detecting movement of traffic to be counted or controlled
    • G08G1/0104—Measuring and analyzing of parameters relative to traffic conditions
    • G—PHYSICS
    • G08—SIGNALLING
    • G08G—TRAFFIC CONTROL SYSTEMS
    • G08G1/00—Traffic control systems for road vehicles
    • G08G1/09—Arrangements for giving variable traffic instructions

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Abstract

The invention provides an stepped variable speed limit control method for an expressway maintenance operation area, which is characterized in that a traffic flow detector is arranged in a warning area and a transition area of the expressway maintenance operation area, the warning area and the traffic operation parameters of the warning area and the transition area of the expressway maintenance operation area are obtained in real time, whether each road section of the expressway maintenance operation area is jammed or not is judged, the variable speed limit values of the warning area and the transition area are calculated, the current road section speed limit value is displayed in real time through a roadside speed limit information prompt board, and the dynamic control of the driving speed of the expressway maintenance operation area is realized.

Description

-type highway maintenance operation area stepped variable speed limit control method
Technical Field
The invention relates to speed limit control methods, in particular to a stepwise variable speed limit control method for a highway maintenance operation area, and belongs to the field of traffic safety and dynamic traffic control.
Background
With the continuous and rapid development of economic society in China, the traffic flow of the highway is rapidly increased, and the highway repaired in early period in China enters the stages of maintenance, major and medium repair and reconstruction and extension successively. When the highway is maintained, a part of lanes need to be sealed, and vehicles need to be decelerated in advance, so that safe and quick passing through a maintenance operation area is ensured.
Most of the existing speed limiting modes adopt fixed values, and when the traffic flow is large, traffic jam is easy to generate in a warning area and an upstream transition area, or the utilization rate of a road is reduced when the traffic flow is small. Meanwhile, the speed limit value adopting the fixed speed limit is often larger, so that the speed change range in the maintenance operation area is larger, and traffic accidents are easy to occur.
Chinese patent CN103606269A discloses control methods for improving traffic efficiency of construction areas of highways, which are limited to large traffic flow sections, and do not consider the influence of vehicle types on speed limit values and the condition that the collision between front and rear vehicles is caused by the emergency brake of drivers due to the large change of the front and rear speed limit values, so that the method has localization limitation and is not suitable for the conditions of medium and small traffic flows.
Disclosure of Invention
The invention aims to solve the problems in the prior art, discloses a control method for kinds of stepped variable speed limits of a highway maintenance operation area, and solves the technical problems that the speed limit value is unreasonable and the speed limit value changes greatly to easily cause traffic accidents due to the fact that the vehicle type characteristics are not considered in the main means for improving the variable speed limits of the highway construction area in the prior art.
The technical scheme is that the stepped variable speed limit control method for the expressway maintenance operation area comprises the following steps:
step , setting a traffic flow detector and a roadside variable information board, wherein the specific setting method comprises the following steps:
defining a warning area and a transition area according to the regulations of road maintenance safety operation regulations;
setting a traffic flow detector at the beginning of the warning area, setting a traffic flow detector at the boundary of the warning area and the transition area, and setting a traffic flow detector at the end of the transition area;
the traffic flow detectors of each group transmit detected traffic data to the control center at regular intervals;
arranging a roadside variable speed limit information board in front of the traffic flow detector;
arranging a roadside variable speed limit information board in front of the traffic flow detector;
the roadside variable speed limit information board and the roadside variable speed limit information board are respectively connected with the control center;
step two: determining the best traffic density reference value K of the highway maintenance operation aream；
Step three: determining traffic density K of warning area and transition area of highway maintenance operation areaiI is 1 or 2, 1 denotes the traffic density of the warning zone, and 2 denotes the traffic density of the transition zone;
step four: judging whether the warning area and the transition area of the expressway maintenance operation area are crowded or not, wherein the specific judgment method comprises the following steps:
if K is satisfiedi(n)＞Km(i is 1 or 2), judging that the road sections in the warning area (1) or the transition area (2) are crowded, and switching to the step five;
if K is satisfiedi(n)＝＜Km(i is 1 or 2), judging that the section of the warning area (1) or the transition area (2) is not crowded, and switching to a seventh step;
step five: controlling the speed limit values of a warning area and a transition area of the highway maintenance operation area:
step six: determining the variable speed limit values of the warning area and the transition area, and issuing the variable speed limit values of the warning area and the transition area in real time through a roadside variable speed limit information board;
step seven: determining the speed limit values of a warning area and a transition area of a highway maintenance operation area, and issuing the speed limit values through a roadside variable speed limit information board;
and step eight, returning to the step three to judge whether the periodical warning area and the transition area are crowded under .
, the distance between the variable speed limit information board and the traffic flow detector is L in d1The calculation formula is as follows:
wherein the content of the first and second substances,
S1-distance travelled by the driver reaction time;
vo-maximum value of the measured free-flow speed of the stretch of road upstream of the warning zone, in units of: km/h;
vl-the lowest speed limit for the warning zone in units of: km/h;
a, an acceleration value of the vehicle during deceleration, wherein the unit is as follows: m/s2。
, the distance between the variable speed limit information board and the traffic flow detector is L in d2The calculation formula is as follows:
Figure BDA0002206051560000022
wherein the content of the first and second substances,
S1-distance travelled by the driver reaction time;
voj-maximum speed limit for the transition zone in units of: km/h;
vlg-the lowest speed limit of the transition zone, in units of: km/h;
a, an acceleration value of the vehicle during deceleration, wherein the unit is as follows: m/s2。
, the traffic density of the warning area in the step three is K1The calculation formula is as follows:
Figure BDA0002206051560000023
wherein the content of the first and second substances,
K1(n) -traffic density of the warning zone;
Eoj(n-1) -traffic flow present in warning areas of the last cycle in veh;
Q5(n) -traffic entering the warning zone at the current cycleFlow rate, in units of veh;
Q6(n) -the traffic flow exiting the warning area in the current period, in veh;
L56-length of the warning zone in km;
traffic density K of the transition zone2The calculation formula is as follows:
Figure BDA0002206051560000031
wherein the content of the first and second substances,
K2(n) -traffic density of the transition zone;
Eog(n-1) -the traffic flow existing in the transition region of the previous period, with the unit of veh;
Q6(n) -the traffic flow driving into the transition area in the current period is veh;
Q7(n) -the traffic flow exiting the transition area in the current period is veh;
L67the length of the transition zone, in km.
And , calculating the variable speed limit value of the warning area of the highway maintenance operation area in the fifth step:
v1l(n)＝v1f(1-(K1(n)/Kj)l)m
wherein the content of the first and second substances,
v1l(n) -the variable speed limit value of the warning area of the highway maintenance operation area in the current period has the unit: km/h; v. of1f-85% quantile value of real-time vehicle flow speed measurement of the upstream road section of the warning area, with the unit of km/h;
K1(n) -the current period traffic flow density of the warning area, and the unit is veh/km;
Kj-highway rated maximum traffic flow density in units of: veh/km;
l and m are parameters; 1.86 and 4.05;
the variable speed limit value of the transition area of the expressway maintenance operation area is calculated as follows:
v2l(n)＝v2f(1-(K2(n)/Kj)l)m
wherein the content of the first and second substances,
v2l(n) -the variable speed limit value of the transition area of the highway maintenance operation area in the current period, wherein the unit is as follows: km/h;
v2fthe 85% quantile value of the real-time vehicle flow speed of the road section of the transition area is km/h;
K2(n) -the current period traffic flow density of the transition area, wherein the unit is veh/km;
Kj-highway rated maximum traffic flow density in units of: veh/km;
l and m are parameters, wherein l is 1.86, and m is 4.05.
Step , the speed limit value of the warning area in the step seven is as follows:
v1(n)＝v1free
wherein the content of the first and second substances,
v1freean initial speed limit value of a warning area of the expressway maintenance operation area is km/h;
limiting speed of the transition zone:
v2(n)＝v2free
wherein the content of the first and second substances,
v2freeand the unit of the initial speed limit value of the transition area of the highway maintenance operation area is km/h.
Step , K isjThe calculation formula is as follows:
Figure BDA0002206051560000041
wherein: x represents the ratio of the large vehicle, h0Represents the average interval between single vehicles, and has the unit of m, hcThe average length of the small car is expressed in m, hHVRepresents the average length of the large vehicle in m.
And , when the variable speed limit value issued by the variable information board at the roadside is a multiple of 5km/h, and when the calculation result is not a multiple of 5km/h, the value of the multiple which is less than the closest 5km/h of the calculation result is taken as the issued variable speed limit value.
Has the advantages that: the traffic flow detectors are arranged in the warning area and the transition area of the expressway maintenance operation area, the congestion conditions of the warning area and the transition area of the expressway maintenance operation area are judged based on the traffic flow data of the warning area and the transition area of the expressway maintenance operation area obtained through real-time detection, the variable speed limit value is calculated based on the traffic density of the variable speed limit control area, the current speed limit value is displayed in real time through the roadside variable speed limit board, the running speed of vehicles in the expressway maintenance operation area is controlled in a stepped dynamic mode, the passing efficiency of the vehicles is improved, and traffic congestion is relieved. The invention effectively realizes the variable speed control of the driver driving in the highway maintenance operation area under different traffic flows, is beneficial to preventing the sudden change of the speed limit value to cause traffic accidents under different traffic flows, and improves the safety and convenience of driving in the highway maintenance operation area.
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FIG. 1 is a schematic view of the layout structure of the highway maintenance operation area according to the present invention;
FIG. 2 is a control flow chart of the present invention.
Detailed Description
Embodiments will be described in detail below with reference to the accompanying drawings.
As shown in fig. 1 and 2, the kinds of highway maintenance operation area stepped variable speed limit control method is characterized by comprising the following steps:
step , setting a traffic flow detector and a roadside variable information board, wherein the specific setting method comprises the following steps:
defining a warning area 1 and a transition area 2 according to the regulations of road maintenance safety operation regulations;
a traffic flow detector 5 is arranged at the beginning of the warning area 1, a traffic flow detector 6 is arranged at the boundary of the warning area 1 and the transition area 2, and a traffic flow detector 7 is arranged at the end of the transition area 2;
the traffic flow detectors detect times every 5 minutes and transmit traffic flow data to the control center, wherein the data comprise traffic flow, traffic density, vehicle speed, vehicle type and the like;
a roadside variable speed limit information board 3 is arranged in front of the traffic flow detector 5;
the distance between the variable speed limit information board 3 at the road side and the traffic flow detector 5 is Ld1The calculation formula is as follows:
Figure BDA0002206051560000042
wherein the content of the first and second substances,
S1-distance travelled by the driver reaction time;
vo-maximum value of the measured free-flow speed of the section upstream of the warning zone 1, in units of: km/h;
vl-the lowest speed limit for the warning zone 1, in units of: km/h;
a, an acceleration value of the vehicle during deceleration, wherein the unit is as follows: m/s2。
A road side variable speed limit information board 4 is arranged in front of the traffic flow detector 6;
the distance between the variable speed limit information board 4 at the road side and the traffic flow detector 6 is Ld2The calculation formula is as follows:
wherein the content of the first and second substances,
S1-distance travelled by the driver reaction time;
vojmaximum speed limit for the transition zone 2, in units of: km/h;
vlgthe lowest speed limit for the transition zone 2, in units of: km/h;
a, an acceleration value of the vehicle during deceleration, wherein the unit is as follows: m/s2；
The roadside variable speed limit information board 3 and the roadside variable speed limit information board 4 are respectively connected with a control center;
step two: determining the best traffic density reference value K of the highway maintenance operation aream(ii) a Said Km＝45veh/km；
Step three: determining traffic density K of warning area 1 and transition area 2 of highway maintenance operation areaiI is 1 or 2, 1 denotes the traffic density of the warning zone, and 2 denotes the traffic density of the transition zone;
traffic density of warning area is K1The calculation formula is as follows:
Figure BDA0002206051560000052
wherein the content of the first and second substances,
K1(n) -traffic density of warning zone 1;
Eoj(n-1) -traffic flow present in warning area 1 of the previous cycle in veh;
Q5(n) -the traffic flow entering warning zone 1 at the current cycle, in veh;
Q6(n) -the current period of traffic flow exiting warning zone 1 in veh;
L56the length of the warning zone 1, in km;
traffic density K of the transition zone2The calculation formula is as follows:
Figure BDA0002206051560000053
wherein the content of the first and second substances,
K2(n) -traffic density of the transition zone 2;
Eog(n-1) -the traffic flow existing in the previous period transition zone 2, in veh;
Q6(n) -the traffic flow entering the transition area 2 in the current period, and the unit is veh;
Q7(n) -the traffic flow exiting the transition area 2 in the current period, and the unit is veh;
L67the length of the transition zone 2, in km.
Step four: whether the warning area 1 and the transition area 2 of the expressway maintenance operation area are crowded or not is judged, and the specific judgment method comprises the following steps:
if K is satisfiedi(n)＞Km(i is 1 or 2), judging that the links in the warning area 1 or the transition area 2 are crowded, and switching to the step five;
if K is satisfiedi(n)＝＜Km(i is 1 or 2), judging that the section of the warning area 1 or the section of the transition area 2 is not crowded, and switching to a step seven;
step five: controlling the speed limit values of a warning area 1 and a transition area 2 of the highway maintenance operation area:
calculating the variable speed limit value of the warning area 1 of the expressway maintenance operation area:
v1l(n)＝v1f(1-(K1(n)/Kj)l)m
wherein the content of the first and second substances,
v1l(n) -the variable speed limit value of the warning area 1 of the highway maintenance operation area in the current period, the unit is as follows: km/h;
v1fan 85% quantile value of the real-time vehicle flow speed measurement of the upstream road section of the warning area 1, wherein the unit is km/h;
K1(n) -the current period traffic flow density of the warning area 1, and the unit is veh/km;
Kj-highway rated maximum traffic flow density in units of: veh/km;
l and m are parameters; 1.86 and 4.05;
calculating the variable speed limit value of the transition area 2 of the expressway maintenance operation area:
v2l(n)＝v2f(1-(K2(n)/Kj)l)m
wherein the content of the first and second substances,
v2l(n) -the variable speed limit value of the transition area 2 of the highway maintenance operation area in the current period, the unit is as follows: km/h;
v2fthe 85% quantile value of the real-time vehicle flow speed measurement of the road section 2 in the transition area is km/h;
K2(n) -the current period traffic flow density of the transition area 2, wherein the unit is veh/km;
KjexpresswayThe unit of the calibrated maximum traffic flow density is as follows: veh/km;
l and m are parameters, wherein l is 1.86, and m is 4.05.
Said KjThe calculation formula is as follows:
Figure BDA0002206051560000061
wherein: x represents the ratio of the large vehicle, h0Represents the average interval between single vehicles, and has the unit of m, hcThe average length of the small car is expressed in m, hHVRepresents the average length of the large vehicle in m.
Step six: determining the variable speed limit values of the warning area 1 and the transition area 2, and issuing the variable speed limit values of the warning area 1 and the variable speed limit values of the transition area 2 in real time through roadside variable speed limit information boards 3 and 4;
step seven: determining the speed limit values of a warning area 1 and a transition area 2 in a highway maintenance operation area, and issuing the speed limit values through roadside variable speed limit information boards 3 and 4;
the speed limit value of the warning area 1 in the step seven is as follows:
v1(n)＝v1free
wherein the content of the first and second substances,
v1freean initial speed limit value of a warning area of the expressway maintenance operation area is km/h;
speed limit of transition zone 2:
v2(n)＝v2free
wherein the content of the first and second substances,
v2freeand the unit of the initial speed limit value of the transition area of the highway maintenance operation area is km/h.
And step eight, returning to the step three to judge whether the periodical warning area and the transition area are crowded under .
The variable speed limit value issued by the variable information board at the roadside is a multiple of 5km/h, and when the calculation result is not a multiple of 5km/h, the value of the multiple of 5km/h which is less than the closest of the calculation result is taken as the issued variable speed limit value.

Claims (8)

  1. The stepped variable speed limit control method for the maintenance operation area of kinds of expressways is characterized by comprising the following steps of:
    step , setting a traffic flow detector and a roadside variable information board, wherein the specific setting method comprises the following steps:
    defining a warning area (1) and a transition area (2) according to the regulations of the road maintenance safety operation regulations;
    a traffic flow detector (5) is arranged at the beginning of the warning area (1), a traffic flow detector (6) is arranged at the junction of the warning area (1) and the transition area (2), and a traffic flow detector (7) is arranged at the end of the transition area (2);
    the traffic flow detectors of each group transmit detected traffic data to the control center at regular intervals;
    a variable speed limit information board (3) at the road side is arranged in front of the traffic flow detector (5);
    a variable speed limit information board (4) at the road side is arranged in front of the traffic flow detector (6);
    the roadside variable speed limit information board (3) and the roadside variable speed limit information board (4) are respectively connected with the control center;
    step two: determining the best traffic density reference value K of the highway maintenance operation aream；
    Step three: determining the traffic density K of a warning area (1) and a transition area (2) of a highway maintenance operation areaiI is 1 or 2, 1 denotes the traffic density of the warning zone, and 2 denotes the traffic density of the transition zone;
    step four: whether the warning area (1) and the transition area (2) of the expressway maintenance operation area are crowded or not is judged, and the specific judgment method comprises the following steps:
    if K is satisfiedi(n)＞Km(i is 1 or 2), judging that the road sections in the warning area (1) or the transition area (2) are crowded, and switching to the step five;
    if K is satisfiedi(n)＝＜Km(i is 1 or 2), judging that the section of the warning area (1) or the transition area (2) is not crowded, and switching to a seventh step;
    step five: controlling the speed limit values of a warning area (1) and a transition area (2) of the highway maintenance operation area:
    step six: determining variable speed limit values of the warning area (1) and the transition area (2), and issuing the variable speed limit values of the warning area (1) and the transition area (2) in real time through roadside variable speed limit information boards (3) and (4);
    step seven: determining the speed limit values of a warning area (1) and a transition area (2) of the highway maintenance operation area, and issuing the speed limit values through roadside variable speed limit information boards (3) and (4);
    and step eight, returning to the step three to judge whether the periodical warning area and the transition area are crowded under .
  2. 2. The stepwise variable speed limit control method for an expressway maintenance work area according to claim 1, wherein the distance between the roadside variable speed limit information board (3) and the traffic flow detector (5) in step is Ld1The calculation formula is as follows:
    Figure FDA0002206051550000011
    wherein the content of the first and second substances,
    S1-distance travelled by the driver reaction time;
    vo-maximum value of the measured free-flow speed of the stretch upstream of the warning zone (1) in units of: km/h;
    vl-the lowest speed limit of the warning zone (1) in units of: km/h;
    a, an acceleration value of the vehicle during deceleration, wherein the unit is as follows: m/s2。
  3. 3. The stepwise variable speed limit control method for an expressway maintenance work area according to claim 1, wherein the distance between the variable speed limit information board (4) on the roadside and the traffic flow detector (6) in step is Ld2The calculation formula is as follows:
    Figure FDA0002206051550000021
    wherein the content of the first and second substances,
    S1-distance travelled by the driver reaction time;
    voj-maximum speed limit for the transition zone (2) in units of: km/h;
    vlg-the lowest speed limit of the transition zone (2) in units of: km/h;
    a, an acceleration value of the vehicle during deceleration, wherein the unit is as follows: m/s2。
  4. 4. The stepped variable speed limit control method for the highway maintenance operation area according to claim 1, characterized in that: the traffic density of the warning area in the third step is K1The calculation formula is as follows:
    Figure FDA0002206051550000022
    wherein the content of the first and second substances,
    K1(n) -traffic density of the warning zone (1);
    Eoj(n-1) -traffic flow present in warning area (1) of previous cycle in veh;
    Q5(n) -the traffic flow entering the warning area (1) in the current period, and the unit is veh;
    Q6(n) -the traffic flow exiting the warning area (1) at the current period, in veh;
    L56-the length of the warning zone (1) in km;
    traffic density K of the transition zone2The calculation formula is as follows:
    Figure FDA0002206051550000023
    wherein the content of the first and second substances,
    K2(n) -the traffic density of the transition zone (2);
    Eog(n-1) -the traffic flow existing in the transition zone (2) of the previous cycle, in veh;
    Q6(n) -traffic flow entering the transition zone (2) at the current cycleThe bit is veh;
    Q7(n) -the traffic flow exiting the transition area (2) in the current period is veh;
    L67-the length of the transition zone (2) in km.
  5. 5. The stepped variable speed limit control method for the highway maintenance operation area according to claim 1, characterized in that: calculating a variable speed limit value of a warning area (1) of the highway maintenance operation area in the fifth step:
    v1l(n)＝v1f(1-(K1(n)/Kj)l)m
    wherein the content of the first and second substances,
    v1l(n) -the variable speed limit value of the warning area (1) of the highway maintenance operation area in the current period has the unit: km/h;
    v1f-85% quantile value of real-time measuring flow speed of the upstream road section of the warning area (1), with the unit of km/h;
    K1(n) -the current period traffic flow density of the warning area (1) is in veh/km;
    Kj-highway rated maximum traffic flow density in units of: veh/km;
    l and m are parameters; 1.86 and 4.05;
    the variable speed limit value of the transition area (2) of the highway maintenance operation area is calculated:
    v2l(n)＝v2f(1-(K2(n)/Kj)l)m
    wherein the content of the first and second substances,
    v2l(n) -the variable speed limit value of the transition area (2) of the highway maintenance operation area in the current period, and the unit is as follows: km/h;
    v2f-85% quantile value of real-time measuring flow speed of the road section of the transition area (2), the unit is km/h;
    K2(n) -the current period traffic flow density of the transition area (2) is in unit of veh/km;
    Kj-highway rated maximum traffic flow density in units of: veh/km;
    l and m are parameters, wherein l is 1.86, and m is 4.05.
  6. 6. The stepped variable speed limit control method for the highway maintenance operation area according to claim 1, characterized in that: the speed limit value of the warning area (1) in the step seven is as follows:
    v1(n)＝v1free
    wherein the content of the first and second substances,
    v1freean initial speed limit value of a warning area of the expressway maintenance operation area is km/h;
    speed limit value of the transition zone (2):
    v2(n)＝v2free
    wherein the content of the first and second substances,
    v2freeand the unit of the initial speed limit value of the transition area of the highway maintenance operation area is km/h.
  7. 7. The stepped variable speed limit control method for the highway maintenance operation area according to claim 4, characterized in that: said KjThe calculation formula is as follows:
    wherein: x represents the ratio of the large vehicle, h0Represents the average interval between single vehicles, and has the unit of m, hcThe average length of the small car is expressed in m, hHVRepresents the average length of the large vehicle in m.
  8. 8. The stepped variable speed limit control method for the highway maintenance operation area according to claim 1, characterized in that: the variable speed limit value issued by the variable information board at the roadside is a multiple of 5km/h, and when the calculation result is not a multiple of 5km/h, the value of the multiple of 5km/h which is less than the closest of the calculation result is taken as the issued variable speed limit value.
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CN111275974A (en) * 2020-02-25 2020-06-12 长安大学 Method for calculating dynamic speed limit recommended value of expressway construction area
CN111613053A (en) * 2020-04-21 2020-09-01 北京掌行通信息技术有限公司 Traffic disturbance detection and analysis method, device, storage medium and terminal
CN112562318A (en) * 2020-11-12 2021-03-26 云南省交通规划设计研究院有限公司 Speed cooperative control method for severe weather frequent expressway speed limit area
CN113256971A (en) * 2021-05-07 2021-08-13 公安部第三研究所 Highway sealing control system and method
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