CN111832139A - Intersection optimization design method based on land resource utilization rate - Google Patents

Intersection optimization design method based on land resource utilization rate Download PDF

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CN111832139A
CN111832139A CN202010614067.XA CN202010614067A CN111832139A CN 111832139 A CN111832139 A CN 111832139A CN 202010614067 A CN202010614067 A CN 202010614067A CN 111832139 A CN111832139 A CN 111832139A
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王方凯
杨晓光
江泽浩
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Abstract

The invention relates to an intersection optimization design method based on land resource utilization, which comprises the following steps: respectively calculating the land resource utilization rate of a plurality of intersections to be optimized; the land resource utilization rate of each intersection is indexed by a percentage method and then is sorted to obtain an intersection land resource utilization index sorting table; screening the intersections with the land resource utilization indexes smaller than or equal to a preset threshold value from the intersection land resource utilization index sorting table, namely determining optimized intersections; and performing layout optimization and signal lamp timing optimization on the determined optimized intersection, wherein the layout optimization comprises the steps of reducing the radius of the right-turn curb and narrowing the width of the motor vehicle lane. Compared with the prior art, the invention completely and comprehensively considers output and input, takes the annual average daily passing number of the intersection as output, takes the land utilization of the intersection as input, can reflect the essence of the operation of the intersection to a greater extent, and is favorable for really improving the operation efficiency of the optimized intersection.

Description

Intersection optimization design method based on land resource utilization rate
Technical Field
The invention relates to the technical field of intersection planning design, in particular to an intersection optimization design method based on land resource utilization rate.
Background
Land is the most valuable material resource in cities, and road traffic land occupies a large amount of urban land resources. Statistics show that more than 20% of land is commonly used for constructing road facilities in urban areas of the Chinese metropolitan centers. In a long period of time, China pursues 'upsizing' and 'plazability' on the surface of a sheet in the intersection planning design, and great waste of urban land resources is caused. In addition, as traffic flow continues to increase, traffic problems with established road intersections begin to manifest — intersections operate less efficiently. Therefore, it is necessary to develop the transformation and optimization design of the existing intersections, so as to ensure the orderly, efficient and safe operation of the traffic flow in the intersections on the basis of reasonably utilizing the land resources.
At present, motor vehicles are mostly used as evaluation objects when the operation efficiency of intersections is evaluated, and the traffic capacity, saturation, delay and queuing length of the motor vehicles are mostly adopted as indexes. These are products centering on motor vehicles, however, the essence of traffic is "movement of people and objects", and if only the passing of motor vehicles is considered in the intersection optimization design, and the movement of pedestrians is not considered, the accuracy of the subsequent intersection optimization design cannot be ensured, and the intersection operation efficiency cannot be really improved.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide an intersection optimization design method based on the land resource utilization rate, the annual average daily passing number of the intersection is taken as output, the land utilization of the intersection is taken as input, so that the essence of the operation of the intersection is comprehensively reflected, and the operation efficiency of the intersection after optimization design is effectively improved.
The purpose of the invention can be realized by the following technical scheme: an intersection optimization design method based on land resource utilization rate comprises the following steps:
s1, respectively calculating the land resource utilization rate of a plurality of intersections to be optimized;
s2, adopting a percentage method to index and sort the land resource utilization rate of each intersection to obtain an intersection land resource utilization index sorting table;
s3, screening the intersection land resource utilization index sorting table to obtain the intersection with the land resource utilization index smaller than or equal to a preset threshold;
and S4, performing layout optimization and signal lamp timing optimization on the intersection screened in the step S3, wherein the layout optimization comprises the steps of reducing the radius of the right-turn curb and narrowing the width of the motor lane.
Further, the step S1 specifically includes the following steps:
s11, determining an intersection to be optimized;
s12, acquiring the average number of passing people per year at each intersection;
s13, acquiring the functional area of each intersection;
and S14, respectively calculating the ratio of the annual average daily passing population to the functional area of each intersection, and obtaining the land resource utilization rate of each intersection.
Further, the step S12 specifically includes the following steps:
s121, acquiring annual traffic volume of the motor vehicles at each intersection to calculate and obtain annual average daily traffic volume of the motor vehicles at each intersection;
s122, acquiring the annual traffic volume of the non-motor vehicles at each intersection to calculate and obtain the annual average daily traffic volume of the non-motor vehicles at each intersection;
s123, acquiring the annual traffic volume of the pedestrians at each intersection to calculate and obtain the annual average daily traffic volume of the pedestrians at each intersection;
and S124, respectively calculating the annual average daily traffic volume corresponding to each intersection according to the annual average daily traffic volume of the motor vehicles, the annual average daily traffic volume of the non-motor vehicles and the annual average daily traffic volume of the pedestrians corresponding to each intersection.
Further, the calculation formula of the annual average daily traffic volume of the motor vehicle at each intersection in step S121 is as follows:
Figure BDA0002563147990000021
wherein v isiMotor vehicle annual traffic volume for intersection i，ViThe average daily traffic volume of the motor vehicles at the intersection i;
the calculation formula of the annual average daily traffic volume of the non-motor vehicles at each intersection in the step S122 is as follows:
Figure BDA0002563147990000022
wherein, biAnnual traffic volume of non-motor vehicles at intersection i, BiThe average daily traffic volume of the non-motor vehicles at the intersection i;
the calculation formula of the average annual daily traffic volume of the pedestrians at each intersection in the step S123 is as follows:
Figure BDA0002563147990000031
wherein p isiThe pedestrian at the intersection i has annual traffic volume PiThe average daily traffic volume of the pedestrians at the intersection i.
Further, the calculation formula of the annual average daily passing number of the intersection in the step S124 is as follows:
Ci＝1.5Vi+1.1Bi+Pi
wherein, CiThe average number of passing people per year at the intersection i.
Further, the step S13 specifically includes the following steps:
s131, acquiring red lines of roads at each intersection based on the design drawing corresponding to each intersection;
s132, calculating to obtain a boundary of a functional area and a road section of each intersection according to the length of a queuing area, the length of a lane changing area and the length of a deceleration area corresponding to each intersection;
s133, measuring the area enclosed by the red line of the intersection road and the boundary line of the intersection functional area and the road section in each intersection design drawing by using CAD software, and combining the drawing proportion of the design drawing to obtain the functional area of each intersection.
Further, the length of the intersection queuing area in step S132 is specifically:
Figure BDA0002563147990000032
wherein Q isiLength of queuing zone, R, for intersection ijTraffic volume, s, for lane jjIs the saturation flow rate of lane j; t is tredThe red light time of the phase of the lane j;
the length of the deceleration area of the intersection is specifically as follows:
Figure BDA0002563147990000033
wherein D isiThe length of the deceleration zone at intersection i, v0Is the initial speed, v, of the motor vehicletThe speed of the motor vehicle after deceleration, a is the deceleration of the motor vehicle;
the distance of the boundary between the intersection functional area and the road section behind the intersection stop line is as follows:
Li＝Qi+Mi+Di
wherein L isiDistance M of the boundary between the i-functional area of the intersection and the road section behind the stop lineiAnd obtaining the length of the lane changing area of the intersection i from the intersection design drawing.
Further, the area of the functional area of the intersection in the step 133 is specifically:
Si＝ki 2·Siw
wherein S isiIs the functional area of intersection i, kiDrawing proportion for design drawing of intersection i, SiwAnd the enclosed area is the area enclosed by the red line of the intersection road of the intersection i and the boundary line between the intersection functional area and the road section.
Further, the land resource utilization rate of the intersection in the step S14 is specifically:
Figure BDA0002563147990000041
wherein alpha isiThe land resource utilization rate of the intersection i is obtained.
Further, the step S2 specifically includes the following steps:
s21, obtaining an intersection corresponding to the minimum land resource utilization value and an intersection corresponding to the maximum land resource utilization value according to the land resource utilization values of all the intersections;
s22, calculating land resource utilization indexes of each intersection by adopting a percentage method, wherein the land resource utilization indexes of the intersections are as follows:
Figure BDA0002563147990000042
wherein, IiIs land resource utilization index, alpha, of intersection iminFor minimum land resource utilization in all intersections, alphamaxThe maximum land resource utilization rate in all the intersections is obtained;
and S23, sorting the land resource utilization indexes of the intersections according to the numerical value comparison relationship to obtain an intersection land resource utilization index sorting table.
Compared with the prior art, the invention has the following advantages:
according to the invention, the annual average daily passing number of the intersection is taken as output, the land utilization of the intersection is taken as input, and the essence of the operation of the intersection can be reflected to a greater extent, so that the accuracy of the optimization of the subsequent intersection is ensured, and the operation efficiency of the optimized intersection can be effectively improved.
The method and the system combine traffic volume data of motor vehicles, non-motor vehicles and pedestrians at the intersection to obtain the average number of passing people per year at the intersection, can comprehensively reflect the corresponding operation capacity of the intersection, and can further ensure the accuracy of land resource utilization data of each intersection by calculating the land resource utilization index in a percentage method.
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FIG. 1 is a schematic flow diagram of the process of the present invention;
FIG. 2 is a schematic diagram of an application process of land resource utilization sequencing for each intersection in the embodiment;
fig. 3 is a schematic diagram of a single intersection functional area in the embodiment.
Detailed Description
The invention is described in detail below with reference to the figures and specific embodiments.
Examples
As shown in fig. 1, an intersection optimization design method based on land resource utilization includes the following steps:
s1, respectively calculating the land resource utilization rate of a plurality of intersections to be optimized;
s2, adopting a percentage method to index and sort the land resource utilization rate of each intersection to obtain an intersection land resource utilization index sorting table;
s3, screening the intersections from the intersection land resource utilization index sorting table to obtain intersections with land resource utilization indexes smaller than or equal to a preset threshold value, namely determining optimized intersections;
and S4, performing layout optimization and signal lamp timing optimization on the determined optimized intersection obtained by screening in the step S3, wherein the layout optimization comprises the steps of reducing the radius of the right-turn curb and narrowing the width of the motor vehicle lane.
The specific process of performing intersection land resource utilization sequencing by applying the method in the embodiment is shown in fig. 2, and includes:
step 1: determining an intersection i to be optimized and a time interval t to be ranked, wherein in the embodiment, the number of passing people C on the average day of the intersection per year is considered in consideration of the effectiveness of the sample sizeiAs an indicator, the time interval here is 365 days a year.
Step 2: and acquiring flow data of the motor vehicles, the non-motor vehicles and the pedestrians in the time interval t of each intersection i, wherein the data can be directly acquired by a traffic flow detector system of a public security traffic police department, and calculating the annual average daily flow of the motor vehicles, the non-motor vehicles and the pedestrians in the intersections.
The calculation process of the annual average daily flow of the motor vehicles, the non-motor vehicles and the pedestrians in the intersection is respectively as follows:
21) acquiring traffic volume v of 365 days of motor vehicles at each intersection i in one year by using a traffic detectoriUsing the formula
Figure BDA0002563147990000051
Calculating the average daily traffic volume V of motor vehicles at each intersection ii；
22) Acquiring traffic volume b of 365 days of non-motor vehicles at each intersection i in one year by using a traffic detectoriUsing the formula
Figure BDA0002563147990000052
Calculating the average daily traffic volume B of the non-motor vehicles at each intersection ii；
23) Acquiring traffic p of the pedestrians at each intersection i for 365 days in one year by using the traffic detectoriUsing the formula
Figure BDA0002563147990000053
Calculating the average daily traffic P of the pedestrians at each intersection ii；
And step 3: using formula Ci＝1.5Vi+1.1Bi+PiCalculating the average number of passing people per year C at the intersection ii。
And 4, step 4: calculating a boundary between a functional area of the intersection and a road section, and from the stop line to the back, wherein the boundary comprises a queuing area, a lane changing area and a deceleration area, and the lengths of the three areas are Qi，MiAnd Di。
The specific calculation steps are as follows:
41) calculating the length Q of the queuing areaiThe formula of (a):
Figure BDA0002563147990000061
wherein Q isiIs the length of the queuing area, m; rjTraffic volume for lane j, pcu/h; sjIs the saturation flow rate for lane j, pcu/h; t is tredIs the red time, s, of the phase of lane j.
42) In this embodiment, the length M of the track changing areaiIs 20 m.
43) Calculating the length D of the deceleration zoneiThe formula of (a):
Figure BDA0002563147990000062
wherein D isiIs the deceleration zone length, m; v. of0The initial speed of the motor vehicle, m/s; v. oftThe speed of the motor vehicle after deceleration is m/s; a is the deceleration of the vehicle, m2/s。
And 5: as shown in fig. 3, the red line of the intersection is drawn on the intersection design drawing, and the area S enclosed by the "red line of the intersection" and the "boundary between the intersection functional area and the road segment" is measurediwCalculating to obtain the area S of the functional area of the intersection according to a drawing proportion k of a drawingi＝ki 2·Siw。
Step 6: calculating the land resource utilization rate of each intersection i and the land resource utilization rate alpha of each intersection iiThe calculation formula of (A) is as follows:
Figure BDA0002563147990000063
wherein alpha isiFor the land resource utilization at intersection i, CiThe average number of passing people per year at the intersection i, SiIs the functional area of the intersection i.
And 7: calculating the land resource utilization index of the intersection I by using a percentile method and calculating the land resource utilization index I of the intersection I by using a percentile methodiThe calculation formula of (A) is as follows:
Figure BDA0002563147990000064
wherein, IiIs land resource utilization index, alpha, of intersection iminFor minimum land resource utilization, alpha, in intersections to be sortedmaxAnd (4) the maximum land resource utilization rate in the intersections to be sorted.
And 8: according to land resource utilization index IiRanking the land resource utilization sufficiency degree of each intersection, wherein the higher the land resource utilization index of each intersection is, the more the intersection fully utilizes the land resources, and otherwise, the less the intersection fully utilizes the land resources.
Specifically, in this embodiment, traffic flow data of vehicles, non-vehicles, and pedestrians at 14 intersections in a certain city from 2017 in 6 months 1 day to 2018 in 6 months 1 day are collected by a traffic flow detector system of a police department, and the annual average daily passing number of each intersection is calculated, and the data is shown in table 1.
Table 1: average number of passing people per year at 14 intersections
Figure BDA0002563147990000071
And calculating the land resource utilization rate of each intersection to be ranked, wherein the data are shown in the table 2.
Table 2: land resource utilization rate of 14 intersections
Figure BDA0002563147990000072
Figure BDA0002563147990000082
Substituting the land resource utilization rates of the 14 intersections into a formula
Figure BDA0002563147990000081
And calculating to obtain a land resource utilization index of the intersection, and ranking the intersections in the evaluation range from high to low based on the land resource utilization index, as shown in table 3.
Table 3: 14 intersection land resource utilization index ranking
Crossing serial number Utilization rate of land resources Land resource utilization index
7 0.81 0
2 0.85 2
1 1.11 18
8 1.23 25
11 1.35 32
12 1.40 34
4 1.49 40
6 1.51 41
3 1.52 42
10 1.65 49
9 1.83 60
13 1.87 62
5 2.22 82
14 2.52 100
In this embodiment, the preset land resource utilization index threshold is 20, and therefore, the intersection 7, the intersection 2, and the intersection 1 all need to be further optimally designed, which mainly includes layout compact design (including narrowing the radius of the right-turn curb and narrowing the width of the motor vehicle lane) and signal timing optimization for the intersection, so as to improve the running efficiency of the intersection.

Claims (10)

1. An intersection optimization design method based on land resource utilization is characterized by comprising the following steps:
s1, respectively calculating the land resource utilization rate of a plurality of intersections to be optimized;
s2, performing sequencing after the land resource utilization rate of each intersection is indexed by adopting a percentage method to obtain an intersection land resource utilization index sequencing table;
s3, screening the intersection land resource utilization index sorting table to obtain the intersection with the land resource utilization index smaller than or equal to a preset threshold;
and S4, performing layout optimization and signal lamp timing optimization on the intersection screened in the step S3, wherein the layout optimization comprises the steps of reducing the radius of the right-turn curb and narrowing the width of the motor lane.
2. The intersection optimization design method based on land resource utilization rate according to claim 1, wherein the step S1 specifically comprises the following steps:
s11, determining an intersection to be optimized;
s12, acquiring the average number of passing people per year at each intersection;
s13, acquiring the functional area of each intersection;
and S14, respectively calculating the ratio of the annual average daily passing population to the functional area of each intersection, and obtaining the land resource utilization rate of each intersection.
3. The intersection optimization design method based on land resource utilization rate according to claim 2, wherein the step S12 specifically comprises the following steps:
s121, acquiring annual traffic volume of the motor vehicles at each intersection to calculate and obtain annual average daily traffic volume of the motor vehicles at each intersection;
s122, acquiring the annual traffic volume of the non-motor vehicles at each intersection to calculate and obtain the annual average daily traffic volume of the non-motor vehicles at each intersection;
s123, acquiring the annual traffic volume of the pedestrians at each intersection to calculate and obtain the annual average daily traffic volume of the pedestrians at each intersection;
and S124, respectively calculating the annual average daily traffic volume corresponding to each intersection according to the annual average daily traffic volume of the motor vehicles, the annual average daily traffic volume of the non-motor vehicles and the annual average daily traffic volume of the pedestrians corresponding to each intersection.
4. The intersection optimization design method based on land resource utilization rate according to claim 3, wherein the calculation formula of the annual average daily traffic volume of the motor vehicles at each intersection in the step S121 is as follows:
Figure FDA0002563147980000021
wherein v isiMotor vehicle annual traffic volume, V, for intersection iiThe average daily traffic volume of the motor vehicles at the intersection i;
the calculation formula of the annual average daily traffic volume of the non-motor vehicles at each intersection in the step S122 is as follows:
Figure FDA0002563147980000022
wherein, biAnnual traffic volume of non-motor vehicles at intersection i, BiThe average daily traffic volume of the non-motor vehicles at the intersection i;
the calculation formula of the average annual daily traffic volume of the pedestrians at each intersection in the step S123 is as follows:
Figure FDA0002563147980000023
wherein p isiThe pedestrian at the intersection i has annual traffic volume PiThe average daily traffic volume of the pedestrians at the intersection i.
5. The intersection optimization design method based on land resource utilization rate according to claim 4, wherein the calculation formula of the annual average daily passing number of the intersection in the step S124 is as follows:
Ci＝1.5Vi+1.1Bi+Pi
wherein, CiIs the average daily passing person of the intersection iAnd (4) counting.
6. The intersection optimization design method based on land resource utilization rate according to claim 1, wherein the step S13 specifically comprises the following steps:
s131, acquiring red lines of roads at each intersection based on the design drawing corresponding to each intersection;
s132, calculating to obtain a boundary of a functional area and a road section of each intersection according to the length of a queuing area, the length of a lane changing area and the length of a deceleration area corresponding to each intersection;
s133, measuring the area enclosed by the red line of the intersection road and the boundary line of the intersection functional area and the road section in each intersection design drawing by using CAD software, and combining the drawing proportion of the design drawing to obtain the functional area of each intersection.
7. The intersection optimization design method based on land resource utilization according to claim 6, wherein the length of the intersection queuing area in the step S132 is specifically as follows:
Figure FDA0002563147980000024
wherein Q isiLength of queuing zone, R, for intersection ijTraffic volume, s, for lane jjIs the saturation flow rate of lane j; t is tredThe red light time of the phase of the lane j;
the length of the deceleration area of the intersection is specifically as follows:
Figure FDA0002563147980000031
wherein D isiThe length of the deceleration zone at intersection i, v0Is the initial speed, v, of the motor vehicletThe speed of the motor vehicle after deceleration, a is the deceleration of the motor vehicle;
the distance of the boundary between the intersection functional area and the road section behind the intersection stop line is as follows:
Li＝Qi+Mi+Di
wherein L isiDistance M of the boundary between the i-functional area of the intersection and the road section behind the stop lineiAnd obtaining the length of the lane changing area of the intersection i from the intersection design drawing.
8. The intersection optimization design method based on land resource utilization according to claim 7, characterized in that the functional area of the intersection in the step 133 is specifically:
Si＝ki 2·Siw
wherein S isiIs the functional area of intersection i, kiDrawing proportion for design drawing of intersection i, SiwAnd the enclosed area is the area enclosed by the red line of the intersection road of the intersection i and the boundary line between the intersection functional area and the road section.
9. The intersection optimization design method based on land resource utilization rate according to claim 8, characterized in that the land resource utilization rate of the intersection in the step S14 is specifically:
Figure FDA0002563147980000032
wherein alpha isiThe land resource utilization rate of the intersection i is obtained.
10. The intersection optimization design method based on land resource utilization rate according to claim 9, wherein the step S2 specifically comprises the following steps:
s21, obtaining an intersection corresponding to the minimum land resource utilization value and an intersection corresponding to the maximum land resource utilization value according to the land resource utilization values of all the intersections;
s22, calculating land resource utilization indexes of each intersection by adopting a percentage method, wherein the land resource utilization indexes of the intersections are as follows:
Figure FDA0002563147980000033
wherein, IiIs land resource utilization index, alpha, of intersection iminFor minimum land resource utilization in all intersections, alphamaxThe maximum land resource utilization rate in all the intersections is obtained;
and S23, sorting the land resource utilization indexes of the intersections according to the numerical value comparison relationship to obtain an intersection land resource utilization index sorting table.
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