CN115116241B - Method for selecting expressway entrance ramp control mode in peak period - Google Patents
Method for selecting expressway entrance ramp control mode in peak period Download PDFInfo
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- CN115116241B CN115116241B CN202210637571.0A CN202210637571A CN115116241B CN 115116241 B CN115116241 B CN 115116241B CN 202210637571 A CN202210637571 A CN 202210637571A CN 115116241 B CN115116241 B CN 115116241B
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- 238000000034 method Methods 0.000 title claims abstract description 18
- 238000011144 upstream manufacturing Methods 0.000 claims abstract description 22
- 238000006243 chemical reaction Methods 0.000 claims description 6
- 238000005259 measurement Methods 0.000 claims description 6
- 238000013461 design Methods 0.000 claims description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000010187 selection method Methods 0.000 description 3
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000011156 evaluation Methods 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
Classifications
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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
- G08G1/08—Controlling traffic signals according to detected number or speed of vehicles
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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
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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
- G08G1/0129—Traffic data processing for creating historical data or processing based on historical data
-
- 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
- G08G1/0137—Measuring and analyzing of parameters relative to traffic conditions for specific applications
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A30/00—Adapting or protecting infrastructure or their operation
- Y02A30/60—Planning or developing urban green infrastructure
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Traffic Control Systems (AREA)
Abstract
The invention discloses a method for selecting a control mode of an expressway entrance ramp at a peak period, which comprises the following steps: detecting road conditions; collecting traffic volumes of various motor vehicles reaching a peak section per hour, and converting the traffic volumes into standard car traffic volumes; collecting whether other roads are replaced by the path trend of the expressway; calculating saturation; judging whether the upstream saturation of the main line of the expressway is greater than 1.0; judging whether the traffic volume of the expressway entrance ramp is more than 900pcu/h, 1050pcu/h and 1200pcu/h; judging whether the gradient of the expressway entrance ramp is less than 1.8%; judging whether the expressway entrance ramp is forbidden or not, and judging whether the expressway entrance ramp is forbidden or not; judging whether the length of the expressway entrance ramp is more than 300 meters or not; judging whether the distance from the ramp starting point to the upstream intersection is more than 110 meters or not; and judging whether the saturation degree of the upstream of the ground road is less than 0.90. The traffic running level of the whole urban expressway system can be effectively improved.
Description
Technical Field
The invention belongs to the field of bus planning in traffic planning, and particularly relates to a method for selecting a control mode of an expressway entrance ramp in a peak period.
Background
Expressway entrance ramp control is one of the most widely used and most effective urban expressway traffic control measures. The common expressway entrance ramp control mode comprises signal lamp control, closed entrance ramp control and the like. Compared with the method without any traffic control, the expressway entrance ramp control can effectively improve the running condition of the expressway main line in the period of peak congestion, and reduce the ramp queuing length and the ramp average delay. The control modes are widely applied to various large cities at home and abroad, so that the expressway congestion is effectively relieved to a certain extent, and the overall traffic service level is improved.
With the rapid increase of the quantity of motor vehicles in recent years, the comfort and convenience of urban expressways are gradually weakened, and expressway congestion is more frequent event in the early and late peak period, so that the expressway entrance ramp is very necessary to carry out traffic control. However, the expressway entrance ramp control modes are various, and how to select a proper control mode according to actual road conditions is very important for better playing the urban expressway function and improving the traffic capacity of an urban road system.
Disclosure of Invention
Aiming at the technical problems, the invention provides a method for selecting a rush hour expressway entrance ramp control mode, which can effectively improve the overall traffic operation level of an urban expressway system and solve the problem of how to select the rush hour expressway entrance ramp control method according to road conditions.
The technical scheme of the invention is as follows:
the invention aims to provide a method for selecting a control mode of an expressway entrance ramp at a peak period, which comprises the following steps:
s01: detecting road conditions, wherein the road conditions comprise an entrance ramp gradient, ramp length, whether a ramp is forbidden, whether the ramp is forbidden to go on buses, and the distance from a ramp starting point to an upstream intersection;
s02: collecting traffic volumes of various motor vehicles reaching the upstream of a main line of a expressway, an entrance ramp of the expressway and the upstream of a ground road in a peak section per hour, and converting the collected traffic volumes of the motor vehicles into traffic volumes of standard cars;
s03: collecting whether other roads are replaced by the path trend of the expressway;
s04: calculating the saturation of the upstream of the main line of the expressway and the upstream of the ground road;
s05: judging whether the upstream saturation of the main line of the expressway is greater than 1.0;
s06: judging whether the traffic volume of the expressway entrance ramp is more than 900pcu/h;
s07: judging whether the traffic volume of the expressway entrance ramp is more than 1050pcu/h;
s08: judging whether the traffic volume of the expressway entrance ramp is more than 1200pcu/h;
s09: judging whether the gradient of the expressway entrance ramp is less than 1.8%;
s10: judging whether the expressway entrance ramp is forbidden or not, and judging whether the expressway entrance ramp is forbidden or not;
s11: judging whether the length of the expressway entrance ramp is more than 300 meters or not;
s12: judging whether the distance from the ramp starting point to the upstream intersection is more than 110 meters or not;
s13: judging whether the saturation degree of the upstream of the ground road is less than 0.90;
s14: if the steps S05, S06, S12 and S13 are satisfied at the same time, but the step S07 is not satisfied, a control mode of setting a signal lamp at the ramp starting point of the entrance ramp is adopted;
s15: if the steps S05, S07, S9, S10 and S11 are satisfied at the same time, but the step S08 is not satisfied, a control mode of setting a signal lamp at an entrance ramp junction is adopted;
s16: if the steps S03, S05 and S08 are simultaneously satisfied, a control mode of closing the expressway entrance ramp is adopted;
s17: if step S05 is not satisfied, the expressway entrance ramp is not required to be controlled.
Preferably, in step S02, the conversion formula for converting the vehicle traffic volume into the equivalent standard car traffic volume is:
；
wherein,the unit of measurement is vehicle/hour for equivalent standard car traffic; />The unit of measurement is vehicle/hour, which is the total traffic volume without conversion; />Is->The vehicle-like traffic volume accounts for a percentage of the total traffic volume; />Is->Vehicle conversion coefficients of the class vehicle; the vehicle type is a large vehicle or a small vehicle.
Preferably, the collection of traffic in step S02 is performed by historical traffic data acquisition or by electronic camera shooting.
Preferably, in step S03, if the area associated with the expressway can be reached through other roads and the detour distance of the vehicle does not exceed 2km, the route of the expressway is considered to be replaced by other roads.
Preferably, in step S04, the saturation is calculated by the formula
；
Wherein,is the saturation of the road section; />The unit of traffic quantity of the equivalent standard car which arrives at the road section in unit time is pcu/h; />The measurement unit is pcu/h for the traffic capacity of the road section.
Preferably, the calculation of the traffic capacity is calculated according to the urban road design Specification (CJJ 37-2012).
Compared with the prior art, the invention has the advantages that:
the method for selecting the expressway entrance ramp control mode in the peak period can comprehensively consider the overall service level and traffic safety of the expressway and the ground road, and effectively improve the overall traffic operation level of an urban road system; the control mode of the expressway entrance ramp in the peak time can be rapidly judged, and the use conditions are concise, clear, convenient and rapid.
Drawings
The invention is further described below with reference to the accompanying drawings and examples:
FIG. 1 is a schematic diagram of a control mode of setting signal lamps by adopting reentrant ramp starting points in a selection method of a control mode of a expressway entrance ramp in a rush period according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of a control mode of setting signal lamps at a junction point of a reentrant ramp according to a selection method of a control mode of a expressway entrance ramp at a peak period according to an embodiment of the present invention;
fig. 3 is a schematic diagram of a control mode for closing an expressway ramp by adopting a selection method of an expressway entrance ramp control mode in a rush hour according to an embodiment of the present invention.
Description of the embodiments
The objects, technical solutions and advantages of the present invention will become more apparent by the following detailed description of the present invention with reference to the accompanying drawings. It should be understood that the description is only illustrative and is not intended to limit the scope of the invention. In addition, in the following description, descriptions of well-known structures and techniques are omitted so as not to unnecessarily obscure the present invention.
Examples
The following is a detailed description of the technical scheme of the present invention, taking the fast road (east delay road-Jinji lake great road section) fast road entrance ramp in su zhou city as an example, with reference to fig. 1 to 3 and tables 1 and 2.
TABLE 1
TABLE 2
The route direction of the expressway in table 1 can be replaced by ground roads, guangxian streets and gold Yan Lu.
And measuring and calculating the road traffic saturation according to the basic information of the expressway entrance ramp and the road traffic volume information shown in the table 1. The method for determining the suitable ramp control mode of the expressway entrance ramp comprises the following steps:
(1) The information of detecting road conditions, collecting road traffic data, replacing paths and the like is shown in table 1;
(2) And calculating the road section traffic saturation. Calculating the traffic capacity of road sections according to the urban road design Specification (CJJ 37-2012)(specific calculation steps are not limited, and can be easily known by those skilled in the art), and the method is performed according to the saturation calculation formula>Obtaining the traffic saturation of the road section, wherein equivalent standard car traffic volume +.>By the formula->The traffic saturation of the road section is calculated to be 1.01, and the upstream saturation of the main line of the expressway is judged to be more than 1.0, so that the condition for controlling the entrance ramp of the expressway is provided.
(3) Under the condition of the flow of the scene one, the traffic volume 990pcu/h (shown in table 2) > 900pcu/h (the judgment condition in the step S06) of the expressway entrance ramp is detected, the distance from the ramp starting point to the upstream intersection is more than or equal to 110m, and the traffic saturation of the upstream of the ground road is 0.56 and less than 0.9. That is, the flow rate of scenario one corresponds to the determination result of step S14, so a control mode of setting a signal lamp at the ramp up point of the entrance ramp is adopted, as shown in fig. 1.
(4) Under the condition of the traffic of the second scenario, the traffic of the expressway entrance ramp is detected to be 1100 pcu/h (shown in table 2) > 1050pcu/h (the judgment condition in the step S07), the ramp grade is 1.6% (shown in table 1), less than 1.8%, the express way entrance ramp is fasted, the bus is forbidden (shown in table 1), and the length of the express way entrance ramp is more than 300m. That is, the flow rate of scenario two corresponds to the determination result of step S15, so a control method of setting a signal lamp at the entrance ramp junction is adopted, as shown in fig. 2.
(5) Under the condition of the traffic of the third scenario, the traffic of the expressway entrance ramp is detected to be 1440 pcu/h (as shown in table 2) > 1200pcu/h (the judgment condition in the step S08), and the path of the expressway has other road alternatives (as shown in table 1), that is, the traffic of the third scenario accords with the judgment result of the step S16, so that a control mode of closing the expressway entrance ramp is adopted as shown in fig. 3.
According to the evaluation result, no matter what kind of situation, compared with the situation that the ramp is not controlled, the control of the expressway entrance ramp effectively improves the running situation of the expressway main line.
The above embodiments are merely illustrative of the principles of the present invention and its effectiveness, and are not intended to limit the invention. Modifications and variations may be made to the above-described embodiments by those skilled in the art without departing from the spirit and scope of the invention. Accordingly, it is intended that all equivalent modifications and variations which can be accomplished by persons skilled in the art without departing from the spirit and technical spirit of the present invention shall be covered by the appended claims.
Claims (3)
1. A method for selecting a control mode of an expressway entrance ramp in a peak period is characterized by comprising the following steps:
s01: detecting road conditions, wherein the road conditions comprise an entrance ramp gradient, ramp length, whether a ramp is forbidden, whether the ramp is forbidden to go on buses, and the distance from a ramp starting point to an upstream intersection;
s02: collecting traffic volumes of various motor vehicles reaching the upstream of a main line of a expressway, an entrance ramp of the expressway and the upstream of a ground road in a peak section per hour, and converting the collected traffic volumes of the motor vehicles into traffic volumes of standard cars;
s03: collecting whether other roads are replaced by the path trend of the expressway;
s04: calculating the saturation of the upstream of the main line of the expressway and the upstream of the ground road;
s05: judging whether the upstream saturation of the main line of the expressway is greater than 1.0;
s06: judging whether the traffic volume of the expressway entrance ramp is more than 900pcu/h;
s07: judging whether the traffic volume of the expressway entrance ramp is more than 1050pcu/h;
s08: judging whether the traffic volume of the expressway entrance ramp is more than 1200pcu/h;
s09: judging whether the gradient of the expressway entrance ramp is less than 1.8%;
s10: judging whether the expressway entrance ramp is forbidden or not, and judging whether the expressway entrance ramp is forbidden or not;
s11: judging whether the length of the expressway entrance ramp is more than 300 meters or not;
s12: judging whether the distance from the ramp starting point to the upstream intersection is more than 110 meters or not;
s13: judging whether the saturation degree of the upstream of the ground road is less than 0.90;
s14: if the steps S05, S06, S12 and S13 are satisfied at the same time, but the step S07 is not satisfied, a control mode of setting a signal lamp at the ramp starting point of the entrance ramp is adopted;
s15: if the steps S05, S07, S9, S10 and S11 are satisfied at the same time, but the step S08 is not satisfied, a control mode of setting a signal lamp at an entrance ramp junction is adopted;
s16: if the steps S03, S05 and S08 are simultaneously satisfied, a control mode of closing the expressway entrance ramp is adopted;
s17: if the step S05 is not satisfied, the expressway entrance ramp is not required to be controlled;
the conversion formula for converting the motor vehicle traffic into the equivalent standard car traffic is as follows:
；
wherein,the unit of measurement is vehicle/hour for equivalent standard car traffic; />The unit of measurement is vehicle/hour, which is the total traffic volume without conversion; />Is->The vehicle-like traffic volume accounts for a percentage of the total traffic volume; />Is->Vehicle conversion coefficients of the class vehicle; the type of the vehicle is a large-sized vehicle or a small vehicle;
in the step S03, if the area contacted by the expressway can be reached through other roads and the detour distance of the vehicle is not more than 2km, the path trend of the expressway is considered to be replaced by other roads;
in step S04, the saturation is calculated as
；
Wherein,is the saturation of the road section; />The unit of traffic quantity of the equivalent standard car which arrives at the road section in unit time is pcu/h; />The measurement unit is pcu/h for the traffic capacity of the road section.
2. The method for selecting a rush hour expressway entrance ramp control method according to claim 1 wherein the collection of traffic in step S02 is performed by historical traffic data acquisition or by electronic camera shooting.
3. The method for selecting a rush hour expressway entrance ramp control method according to claim 1, wherein the calculation of the traffic capacity is calculated according to the city road design Specification (CJJ 37-2012).
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109035813A (en) * | 2018-10-10 | 2018-12-18 | 南京宁昱通交通科技有限公司 | Expressway exit ring road and land-service road joint intersection signal dynamics control technology |
| CN109272744A (en) * | 2018-08-10 | 2019-01-25 | 东南大学 | A kind of city expressway On-ramp Control system and control method based on queue length |
| CN109598928A (en) * | 2018-11-26 | 2019-04-09 | 启迪设计集团股份有限公司 | The determination method of signalized crossing setting U-turn at intersection |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US10922965B2 (en) * | 2018-03-07 | 2021-02-16 | Here Global B.V. | Method, apparatus, and system for detecting a merge lane traffic jam |
| CN112201057B (en) * | 2020-09-08 | 2021-11-09 | 同济大学 | Expressway vehicle speed and ramp cooperative control method based on accident risk |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109272744A (en) * | 2018-08-10 | 2019-01-25 | 东南大学 | A kind of city expressway On-ramp Control system and control method based on queue length |
| CN109035813A (en) * | 2018-10-10 | 2018-12-18 | 南京宁昱通交通科技有限公司 | Expressway exit ring road and land-service road joint intersection signal dynamics control technology |
| CN109598928A (en) * | 2018-11-26 | 2019-04-09 | 启迪设计集团股份有限公司 | The determination method of signalized crossing setting U-turn at intersection |
Non-Patent Citations (1)
| Title |
|---|
| 城市快速路入口匝道控制方案研究;胡兴华;杨继明;;西华大学学报(自然科学版);20090715(第04期);全文 * |
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