CN110807928B - Statistical evaluation method for bus priority effect - Google Patents
Statistical evaluation method for bus priority effect Download PDFInfo
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- CN110807928B CN110807928B CN201911076913.0A CN201911076913A CN110807928B CN 110807928 B CN110807928 B CN 110807928B CN 201911076913 A CN201911076913 A CN 201911076913A CN 110807928 B CN110807928 B CN 110807928B
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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
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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
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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
- G08G1/0137—Measuring and analyzing of parameters relative to traffic conditions for specific applications
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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
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- G—PHYSICS
- G08—SIGNALLING
- G08G—TRAFFIC CONTROL SYSTEMS
- G08G1/00—Traffic control systems for road vehicles
- G08G1/123—Traffic control systems for road vehicles indicating the position of vehicles, e.g. scheduled vehicles; Managing passenger vehicles circulating according to a fixed timetable, e.g. buses, trains, trams
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Abstract
The invention discloses a method for counting and evaluating bus priority effects, which is used for comparing the time of a bus reaching a stop line of an intersection with the starting time of a passing phase to judge whether the bus waits for a red light when passing through the intersection, counting the proportion of buses in different directions of a single intersection that the red light does not wait for passing through the intersection, and comparing the proportion by combining data in a time period without implementing bus signal priority so as to evaluate the effect of implementing bus signal priority at the intersection. The invention utilizes the road section detection area as a virtual detector to calculate the bus passing time on the road section and the bus passing time, and evaluates the bus passing efficiency at the intersection by calculating the passing rate so as to reflect the evaluation dimension of the bus priority implementation effect.
Description
Technical Field
The invention belongs to the technical field of urban traffic signal control, and particularly relates to a statistical evaluation method for bus priority effect.
Background
At present, an integrated public transportation urban system with rail transit as a framework, ground public transportation as a network, taxis as supplement and slow traffic as extension is proposed to be constructed in a plurality of large and medium-sized cities in China; particularly, an advanced bus priority signal control technology which is adaptive to the urban motorized development needs to be established, the traffic potential of the existing traffic network is fully exerted, the service level of buses is improved, more citizens are attracted to adopt bus traveling, the use of private cars is reduced, and the road congestion condition of a city is relieved.
After the bus signal priority control is implemented, how to reflect the influence of the signal control on the bus at the intersection by using the existing data faithfully becomes a research problem.
Therefore, it is necessary to provide a method for evaluating the bus priority effect by using the positioning data of the bus and combining with the release data of the traffic signal, so as to provide a reference basis for optimizing and adjusting the bus control strategy.
Disclosure of Invention
In view of the defects of the prior art, the invention aims to provide a statistical evaluation method for bus priority effect, so as to solve the problems of inaccurate bus signal priority control evaluation and unintelligent evaluation in the prior art.
In order to achieve the purpose, the technical scheme adopted by the invention is as follows:
the invention discloses a statistical evaluation method of bus priority effect, comprising the following steps:
1) calculating the passing time of the bus in the road section detection area;
2) calculating the equivalent time of the bus reaching a stop line;
3) and analyzing whether the bus waits for the red light at the intersection or not.
Preferably, the step 1) specifically comprises: detecting the passing time of the bus in a road section area before the bus arrives at the intersection through the GPS record of the bus and the self-defined virtual detection area, wherein the detection result comprises the entering time and the exiting time; and subtracting the entering time from the exiting time of the road section detection area to obtain the passing time of the bus in the road section detection area.
Preferably, the step 2) specifically includes: analyzing the passing time of the bus in the section detection area to obtain the average passing time T of the bus when the red light is not equal to pass through the section detection area, and calculating a plurality of T in different sections due to different road passing conditions in different time periods in each section detection area, wherein: t is1,T2,T3,T4,T5Respectively representing time intervals 1-5, wherein the time intervals are divided into two types of flat peaks and peak peaks, the time intervals 2 and 4 are peak peaks in the morning and evening, and the time intervals 1, 3 and 5 are flat peaks.
Preferably, the average passing time T in the step 2) is calculated byThe following: extracting the passing time of the buses in the section detection area in the time period n to form a set COL (T), and assuming that the arrival time of the buses accords with random distribution, under the condition that the buses are at unequal red lights, the time difference of the buses passing through the section detection area is not large due to similar traffic flow densities in the same time period; under the condition that the bus waits for the red light, the time for waiting for the red light is random, so that the passing time of the bus passing through the road section detection area is also greatly floated; under the condition of sufficient sample size, counting the frequency of the passage time of the section detection area of the bus under different values, and setting the frequency as [ P ]1,P2,P3...PN]And averaging the time corresponding to the previous K names of the frequency to obtain a credible average passing time T, wherein K is 3.
Preferably, the equivalent time of the bus arriving at the stop line is calculated in the step 2): the time R when the bus enters the road section detection area is the average passing time T, and the equivalent time when the bus reaches the stop line is R + T.
Preferably, the step 3) specifically includes:
31) calculating the passing phase of the bus;
when the bus passes through the intersection, the phase position of the outgoing time of the bus is the passing phase position of the bus, and the starting time of the phase position i is set as piThe phase length is l, the time of the bus exiting the passing area of the road section is C, and if p is meti＜C＜pi+ l, the phase i is the passing phase of the bus;
32) analysis under red light waiting;
when the bus reaches the equivalent moment of the stop line, if the passing phase is green, the bus does not wait for the red light, otherwise, the bus waits for the red light; then there are:
the method comprises the steps of analyzing data of a bus passing through an intersection every time to obtain the bus passing rate of each direction of the intersection, namely the number of times/total number of times of vehicles passing through unequal red lights, analyzing the implementation effect of bus priority at the intersection according to the passing rate, and analyzing the improvement amount of the passing efficiency of the bus at the intersection after the signal priority is implemented by combining with data records before the signal priority is implemented.
The invention has the beneficial effects that:
the invention utilizes the road section detection area to analyze the passing condition of the bus before entering the intersection, is an effective treatment to the bus GPS data, and the smaller the bus GPS acquisition interval is, the higher the detection precision is.
2. According to the invention, when the bus passes through the road section detection area each time, whether the bus waits for the red light on the road section can be analyzed by checking the GPS record, and if the bus waits for the red light on the road section detection area, the intensive distribution of coordinate points can be realized, so that whether the bus waits for the red light on the road section detection area can be accurately found out. However, in view of the actual situation, the analysis method of manually comparing by combining the GIS tool is not efficient enough, and the method has the advantages that the analysis method is established, and the result can be calculated in a programming mode.
3. When the red light of the vehicle is not equal to the red light, the method combines the phase operation record of the traffic signal machine, so that the result is more accurate, and the judgment precision is higher than that of the method of simply judging the passing time of the road section detection area.
Drawings
FIG. 1 is a schematic diagram of the method of the present invention.
Fig. 2 is a schematic view of a detection region.
Detailed Description
In order to facilitate understanding of those skilled in the art, the present invention will be further described with reference to the following examples and drawings, which are not intended to limit the present invention.
Phase position: the signal display state of one or more traffic flows which simultaneously obtain the right of way in a signal period; such as the straight-ahead driving from north to south, the left turn from north to south, etc., in the phase of the straight-ahead driving from north to south, only the straight-ahead driving vehicles from north to south can pass through the intersection.
Passing phase: refers to one or more phases in which a vehicle can pass through an intersection in one signal cycle.
Referring to fig. 1 and 2, the statistical evaluation method for bus priority effect of the invention comprises the following steps:
1) detecting the passing time of the bus in a road section area before the bus arrives at the intersection through the GPS record of the bus and the self-defined virtual detection area, wherein the detection result comprises the entering time and the exiting time; subtracting the entering time from the exiting time of the road section detection area to obtain the passing time of the bus in the road section detection area;
2) analyzing the passing time of the bus in the section detection area to obtain the average passing time T of the bus when the red light is not equal to pass through the section detection area, and calculating a plurality of T in different sections due to different road passing conditions in different time periods in each section detection area, wherein: t is1，T2，T3，T4，T5Respectively representing time intervals 1-5, wherein the time intervals are divided into two types of flat peaks and peak peaks, the time intervals 2 and 4 are peak peaks in the morning and evening, and the time intervals 1, 3 and 5 are flat peaks.
The average transit time T is calculated as follows: extracting the passing time of the buses in the section detection area in the time period n to form a set COL (T), and assuming that the arrival time of the buses accords with random distribution, under the condition that the buses are at unequal red lights, the time difference of the buses passing through the section detection area is not large due to similar traffic flow densities in the same time period; under the condition that the bus waits for the red light, the time for waiting for the red light is random, so that the passing time of the bus passing through the road section detection area is also greatly floated; under the condition of sufficient sample size, counting the frequency of the passage time of the section detection area of the bus under different values, and setting the frequency as [ P ]1，P2，P3...PN]And averaging the time corresponding to the previous K names of the frequency to obtain a credible average passing time T, wherein K is 3.
Calculating the equivalent time of the bus reaching the stop line: the time R when the bus enters the road section detection area is the average passing time T, and the equivalent time when the bus reaches the stop line is R + T.
3) Calculating the passing phase of the bus;
when the bus passes through the intersection, the phase position of the outgoing time of the bus is the passing phase position of the bus, and the starting time of the phase position i is set as piThe phase length is l, the time of the bus exiting the passing area of the road section is C, and if p is meti＜C＜pi+ l, the phase i is the passing phase of the bus;
analysis under red light waiting;
when the bus reaches the equivalent moment of the stop line, if the passing phase is green, the bus does not wait for the red light, otherwise, the bus waits for the red light; then there are:
the method comprises the steps of analyzing data of a bus passing through an intersection every time to obtain the bus passing rate of each direction of the intersection, namely the number of times/total number of times of vehicles passing through unequal red lights, analyzing the implementation effect of bus priority at the intersection according to the passing rate, and analyzing the improvement amount of the passing efficiency of the bus at the intersection after the signal priority is implemented by combining with data records before the signal priority is implemented.
While the invention has been described in terms of its preferred embodiments, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention.
Claims (4)
1. A statistical evaluation method for bus priority effect is characterized by comprising the following steps:
1) calculating the passing time of the bus in the road section detection area;
2) calculating the equivalent time of the bus reaching a stop line;
3) analyzing whether the bus waits for a red light at the intersection or not;
the step 2) specifically comprises the following steps: analyzing the passing time of the bus in the road section detection area to obtainThe average passing time T of the bus unequal red light passing through the section detection area can be calculated in different time periods due to different section detection areas of different road passing conditions, wherein: t is1,T2,T3,T4,T5Respectively representing time intervals 1-5, wherein the time intervals are divided into flat peaks and peak peaks, the time intervals 2 and 4 are peak peaks in the morning and evening, and the time intervals 1, 3 and 5 are flat peaks;
the calculation method of the average passing time T in the step 2) is as follows: extracting the passing time of the buses in the section detection area in the time period n to form a set COL (T), and assuming that the arrival time of the buses accords with random distribution, under the condition that the buses are at unequal red lights, the time difference of the buses passing through the section detection area is not large due to similar traffic flow densities in the same time period; under the condition that the bus waits for the red light, the time for waiting for the red light is random, so that the passing time of the bus passing through the road section detection area is also greatly floated; under the condition of sufficient sample size, counting the frequency of the passage time of the section detection area of the bus under different values, and setting the frequency as [ P ]1,P2,P3...PN]And averaging the time corresponding to the first K names of the frequency to obtain a credible average passing time T.
2. The statistical evaluation method for bus priority effects according to claim 1, wherein the step 1) specifically comprises: detecting the passing time of the bus in a road section area before the bus arrives at the intersection through the GPS record of the bus and the self-defined virtual detection area, wherein the detection result comprises the entering time and the exiting time; and subtracting the entering time from the exiting time of the road section detection area to obtain the passing time of the bus in the road section detection area.
3. The statistical evaluation method of bus priority effect according to claim 1, characterized in that in step 2), the equivalent time of the bus arriving at the stop line is calculated: the time R when the bus enters the road section detection area is the average passing time T, and the equivalent time when the bus reaches the stop line is R + T.
4. The statistical evaluation method for bus priority effects according to claim 3, wherein the step 3) specifically comprises:
31) calculating the passing phase of the bus;
when the bus passes through the intersection, the phase position of the outgoing time of the bus is the passing phase position of the bus, and the starting time of the phase position i is set as piThe phase length is l, the time of the bus exiting the passing area of the road section is C, and if p is meti＜C＜pi+ l, the phase i is the passing phase of the bus;
32) analysis under red light waiting;
when the bus reaches the equivalent moment of the stop line, if the passing phase is green, the bus does not wait for the red light, otherwise, the bus waits for the red light; then there are:
the method comprises the steps of analyzing data of a bus passing through an intersection every time to obtain the bus passing rate of each direction of the intersection, namely the number of times/total number of times of vehicles passing through unequal red lights, analyzing the implementation effect of bus priority at the intersection according to the passing rate, and analyzing the improvement amount of the passing efficiency of the bus at the intersection after the signal priority is implemented by combining with data records before the signal priority is implemented.
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| CN107293134A (en) * | 2017-06-19 | 2017-10-24 | 东南大学 | Bus signals priority acccess control strategy based on virtual electronic fence |
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2019
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Patent Citations (7)
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| CN101540109A (en) * | 2008-03-17 | 2009-09-23 | 上海宝康电子控制工程有限公司 | Control system for automatically accomplishing bus priority according to traffic stream change |
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