CN103489318B - Intersection motor vehicle signal light setting requirement judgment method - Google Patents

Abstract

The invention discloses an intersection motor vehicle signal light setting requirement judgment method, and belongs to the field of road traffic management. The method comprises the steps that firstly, relevant information is acquired from an intersection, relevant parameters are extracted and a relation expression between an intersection motor vehicle signal light selection basis value and the extracted parameters is built according to an accumulative factor model; then, a corresponding intersection motor vehicle setting requirement value W is calculated through a combination of different values of appointed relevant parameters; an intersection motor vehicle setting threshold value W0 is appointed, and when the value W of a parameter combination corresponding to a certain intersection is larger than the threshold value, motor vehicle signal lights need to be set in the intersection, otherwise, the intersection signal lights do not need to be set. Taking consideration of the effect of all kinds of traffic factors, road factors and the traffic environment including motor vehicles and pedestrians on intersection motor vehicle signal light setting, the intersection motor vehicle signal light setting requirement judgment method facilitates more accurate judge of motor vehicle signal light setting requirements, shortening of time period of judge and improving of judge efficiency and precision.

Description

A kind of intersection motor vehicle signal light arranges demand decision method

Technical field

The present invention relates to a kind of intersection motor vehicle signal light and demand decision method is set.

Background technology

Crossing, as the node in road network, is the important component part of roadnet.But because vehicle mutually intersects in crossing, collaborates and shunts, the place making crossing become traffic bottlenecks and accident in whole road network easily to send out.In order to solve this traffic problems, the setting of intersection motor vehicle signal light promotes one of traffic safety, the important measures ensureing the coast is clear.The traffic capacity that motor vehicle signal lamp effectively can improve crossing is reasonably set, reduces the delay of vehicle, reduce the generation of road accident rate; If but motor vehicle signal lamp arranges improper, then the expectation of driver can be run counter to, causes excessive delay, increase the generation of accident rate.Therefore, intersection motor vehicle signal light rationally arrange most important.

Intersection motor vehicle signal light in the past arranges the method for mainly discrete factor, and what " Uniform Traffic control device detailed rules and regulations " as the U.S. were formulated crosses the installation warrants such as street, accident record according to 8 hours flows, 4 hours flows, peak hour flow, pedestrian's flow, pupils; Domestic mainly from the method that traffic efficiency, the traffic capacity, acceptability risk etc. are discrete; China's " road traffic signal lamp installation specification " has formulated the signal warrant based on peak hour flow, 12 hours flows, and the method only need meet wherein some specific factors and consider to arrange motor vehicle signal lamp; And the setting of intersection motor vehicle signal light is a problem relating to many factors, as the size of the road intersection volume of traffic, the factor such as composition, the speed of a motor vehicle, traffic safety of vehicle, only by rule of thumb or rely on the requirement that a single index can not meet Urban Traffic Planning and management, if therefore can a kind of method be found, complicacy and the multifarious requirement of urban highway traffic demand can be met, actual road traffic condition can be embodied again, then can significantly improve the efficiency and confidence level that judge intersection motor vehicle signal light method to set up.

Summary of the invention

Technical matters to be solved by this invention is to overcome the deficiencies in the prior art, provides a kind of intersection motor vehicle signal light to arrange demand decision method.

The present invention specifically solves the problems of the technologies described above by the following technical solutions: the present invention devises a kind of intersection motor vehicle signal light and arranges demand decision method, comprises following concrete steps:

Step (1): obtain the roadway characteristic parameter of a certain crossing, traffic flow parameter and traffic environment parameter, wherein, roadway characteristic parameter comprises travel speed and the number of track-lines of the ratio shared by cart, 85% vehicle on these crossing main roads in the spacing of this crossing and Adjacent Intersections, this crossing driving vehicle, traffic flow parameter comprises the magnitude of traffic flow and pedestrian's flow of each entrance driveway in this crossing, and traffic environment parameter comprises the geographic entity of this crossing and pedestrian's feature of this crossing;

Step (2): set up above-mentioned intersection motor vehicle signal light installation warrants model based on accumulative factor Model, that is:

$W=[\frac{V_m\·V_c}{K_1}+F\·\left(\frac{V_m\·P_c}{K_2}\right)\·L]\·R$

Wherein, W arranges motor vehicle signal lamp according to value, V for this crossing _mfor main roads peak hour flow amount, V _cfor the peak hour flow amount that secondary road is maximum, P _cfor the peak hour pedestrian flow of pedestrians travel's main roads, F is pedestrian's factor of influence, and L is main roads entrance driveway number of track-lines, K ₁for vehicle regulation coefficient, K ₂for pedestrian's regulation coefficient, R is roadway characteristic factor of influence, is expressed as:

R=R ₁·R ₂·R ₃·R ₄

Wherein, R ₁for the crossing effect of distance factor, R ₂for the cart scale effect factor, R ₃for the rate factor, R ₄for crossing geographic entity factor of influence;

Step (3): list value relation according to each parameter in model in step (2), wherein:

F value depends on the land use morphology that this crossing is got, if having primary school near this crossing, the value of F is 1.2, if having market or first, high school near this crossing, the value of F is 1.1, otherwise the value of F is 1,

R ₁value depend on the size of this crossing and Adjacent Intersections spacing, namely

$R_1=\left\{\begin{array}{cc}0.9& (d<200)\\ 1.04-\frac{0.29}{2^{d/210}}& (d\&GreaterEqual;200)\end{array}\right.$

Wherein, d is the spacing of this crossing and Adjacent Intersections;

R ₂value depend on ratio P in this crossing driving vehicle shared by cart _t:

$R_2=\left\{\begin{array}{cc}1& (P_t\&le;5\%)\\ 0.96+P_t& (5\%\&le;P_t\&le;20\%)\\ 1.16& (P_t>20\%)\end{array}\right.$

R ₃value depend on the size of the travel speed of 85% vehicle on these crossing main roads, namely

$R_3=\left\{\begin{array}{cc}1& (V\&le;50)\\ 1+\frac{V-50}{200}& (50<V\&le;80)\\ 1.15& (V>80)\end{array}\right.$

Wherein, V is 85% travel speed on these crossing main roads;

R ₄value depend on the geographic entity of this crossing, namely

$R_4=\left\{\begin{array}{cc}1.25& (\mathrm{pop}\&GreaterEqual;\mathrm{500,000})\\ 1.15& (\mathrm{100,000}<\mathrm{pop}<\mathrm{500,000})\\ 1& (\mathrm{pop}\&le;\mathrm{100,000})\end{array}\right.$

Wherein, pop is the population size number on this crossing;

Here, constant value K is got ₁be 1350, K ₂be 4500;

Step (4): according to the different values of each variable in step (3), calculates this crossing and arranges motor vehicle signal lamp according to value W;

Step (5): specify this crossing that the threshold value W of motor vehicle signal lamp is set ₀, when the W calculated in step (4) is greater than threshold value W ₀time, then this crossing needs to arrange motor vehicle signal lamp.

The present invention compared with prior art tool has the following advantages:

The present invention proposes a kind of intersection motor vehicle signal light and demand decision method is set, by the method for accumulative factor analysis, set up the installation warrants value based on factors such as road conditions, motor vehicle and pedestrian traffic amount, traffic environments, judge that this crossing is the need of arranging motor vehicle signal lamp, be conducive to shortening the time cycle judged, improve the efficiency and precision that judge, improve traffic efficiency and the traffic safety of crossing.Meanwhile, the present invention can to simplify the operation flow process by setting up motor vehicle signal lamp installation warrants figure, easy to use, practical, has good application prospect.

Accompanying drawing explanation

Fig. 1 is method flow diagram of the present invention;

Fig. 2 is example crossing motor vehicle and pedestrian's peak hour flow figure.

Embodiment

Below in conjunction with accompanying drawing, the present invention is described in further detail:

As shown in Figure 1, the present invention devises a kind of intersection motor vehicle signal light and arranges demand decision method, comprises following concrete steps:

Step (1): by local Traffic Administration Bureau data and the approach such as manual research, data acquisition on the spot, obtain relevant information from crossing, described relevant information comprises: the roadway characteristic of crossing, the magnitude of traffic flow and traffic environment; And corresponding parameter is extracted from got information, wherein: the roadway characteristic parameter of crossing comprises: the spacing (rice) of Adjacent Intersections, the ratio shared by cart, speed (kilometer/hour), number of track-lines; Traffic flow parameter comprises: crossing each entrance driveway peak hour flow flow (/ hour), peak hour pedestrian flow; Traffic environment parameter comprises: the geographic entity (big city of crossing, medium-sized city or small city, according to small and medium-sized cities Green Book, population is less than or equal to 200,000 for small city, 200000-50 ten thousand be medium-sized city, the big city of more than 500,000), whether pedestrian's feature residing for crossing (neighbouringly has primary school, junior middle school or senior middle school, shopping centre);

Step (2): set up above-mentioned intersection motor vehicle signal light installation warrants model based on accumulative factor Model, that is:

$W=[\frac{V_m\&CenterDot;V_c}{K_1}+F\&CenterDot;\left(\frac{V_m\&CenterDot;P_c}{K_2}\right)\&CenterDot;L]\&CenterDot;R$

Wherein, W arranges motor vehicle signal lamp according to value, V for this crossing _mfor main roads peak hour flow amount, V _cfor the peak hour flow amount that secondary road is maximum, P _cfor the peak hour pedestrian flow of pedestrians travel's main roads, F is pedestrian's factor of influence, and L is main roads entrance driveway number of track-lines, K ₁for vehicle regulation coefficient, K ₂for pedestrian's regulation coefficient, R is roadway characteristic factor of influence, is expressed as:

R=R ₁·R ₂·R ₃·R ₄

Wherein, R ₁for the crossing effect of distance factor, R ₂for the cart scale effect factor, R ₃for the rate factor, R ₄for crossing geographic entity factor of influence;

Step (3): list value relation according to each parameter in model in step (2), wherein:

F value depends on the land use morphology that this crossing is got, if having primary school near this crossing, the value of F is 1.2, if having market or first, high school near this crossing, the value of F is 1.1, otherwise the value of F is 1,

R ₁value depend on the size of this crossing and Adjacent Intersections spacing, namely

$R_1=\left\{\begin{array}{cc}0.9& (d<200)\\ 1.04-\frac{0.29}{2^{d/210}}& (d\&GreaterEqual;200)\end{array}\right.$

Wherein, d is the spacing of this crossing and Adjacent Intersections;

R ₂value depend on ratio P in this crossing driving vehicle shared by cart _t:

$R_2=\left\{\begin{array}{cc}1& (P_t\&le;5\%)\\ 0.96+P_t& (5\%<P_t<20\%)\\ 1.16& (P_t>20\%)\end{array}\right.$

R ₃value depend on the size of the travel speed of 85% vehicle on these crossing main roads, namely

$R_3=\left\{\begin{array}{cc}1& (V\&le;50)\\ 1+\frac{V-50}{200}& (50<V\&le;80)\\ 1.15& (V>80)\end{array}\right.$

Wherein, V is 85% travel speed on these crossing main roads;

R ₄value depend on the geographic entity of this crossing, namely

$R_4=\left\{\begin{array}{cc}1.25& (\mathrm{pop}\&GreaterEqual;\mathrm{500,000})\\ 1.15& (\mathrm{100,000}<\mathrm{pop}<\mathrm{500,000})\\ 1& (\mathrm{pop}\&le;\mathrm{100,000})\end{array}\right.$

Wherein, pop is the population size number on this crossing;

Here, constant value K is got ₁be 1350, K ₂be 4500;

Step (4): according to the different values of each variable in step (3), calculates this crossing and arranges motor vehicle signal lamp according to value W;

Step (5): specify this crossing that the threshold value W of motor vehicle signal lamp is set ₀, when the W calculated in step (4) is greater than threshold value W ₀time, then this crossing needs to arrange motor vehicle signal lamp.

Example: select Lu Yulai Yin Da road one, source, sky, Jiangning county unsignalized intersection to be research object, carried out the volume of traffic observation of continuous peak hour to this crossing, this intersection traffic flow of finishing analysis, as shown in Figure 2.Roadway characteristic and the geographic entity data of this crossing are as shown in the table:

Table 1 day source Lu Yulai Yin Da road intersection and geographic entity data survey result

1. determine the correlation parameter of motor vehicle signal lamp installation warrants model

1.1) main roads peak hour flow amount V _m=350+500=850 (veh/h);

1.2) the peak hour flow amount V that secondary road is maximum _c=136 (veh/h);

1.3) the peak hour pedestrian flow P of pedestrians travel's main roads _c=30+20=50;

1.4) market is had near pedestrian's factor of influence F=1.1();

1.5) main roads entrance driveway number of track-lines L=3;

1.6) roadway characteristic factor of influence R:

1. according to formula 3, the crossing effect of distance factor

2. according to formula 4, cart scale effect factor R ₂=0.96+0.06=1.02;

3. according to formula 5, the rate factor

4. according to formula 6, geographic entity factor of influence R ₄=1;

By value 1., 2., 3., 4., according to formula 2, obtain roadway characteristic factor of influence R=0.98 × 1.02 × 1.08 × 1=1.079.

2. computing machine motor-car signal warrant value W

According to (1) formula, computing machine motor-car signal warrant value

$W=[\frac{V_m\&CenterDot;V_c}{K_1}+F\&CenterDot;\left(\frac{V_m\&CenterDot;P_c}{K_2}\right)\&CenterDot;L]\&CenterDot;R=[\frac{850\&times;136}{1350}+1.1\&times;\left(\frac{850\&times;50}{4500}\right)\&times;3]\&times;1.079=126,$

Be greater than the threshold value (W specified in step (4) ₀=100), thus advise arranging motor vehicle signal lamp in this crossing.

Claims (1)

1. intersection motor vehicle signal light arranges a demand decision method, it is characterized in that, comprises following concrete steps:

Step (1): obtain the roadway characteristic parameter of a certain crossing, traffic flow parameter and traffic environment parameter, wherein, roadway characteristic parameter comprises travel speed and the number of track-lines of the ratio shared by cart, 85% vehicle on these crossing main roads in the spacing of this crossing and Adjacent Intersections, this crossing driving vehicle, traffic flow parameter comprises the magnitude of traffic flow and pedestrian's flow of each entrance driveway in this crossing, and traffic environment parameter comprises the geographic entity of this crossing and pedestrian's feature of this crossing;

Step (2): set up above-mentioned intersection motor vehicle signal light installation warrants model based on accumulative factor Model, that is:

$W=[\frac{V_m\&CenterDot;V_c}{K_1}+F\&CenterDot;\left(\frac{V_m\&CenterDot;P_c}{K_2}\right)\&CenterDot;L]\&CenterDot;R$

Wherein, W is that crossing arranges motor vehicle signal lamp according to value, V _mfor main roads peak hour flow amount, V _cfor the peak hour flow amount that secondary road is maximum, P _cfor the peak hour pedestrian flow of pedestrians travel's main roads, F is pedestrian's factor of influence, and L is main roads entrance driveway number of track-lines, K ₁for vehicle regulation coefficient, K ₂for pedestrian's regulation coefficient, R is roadway characteristic factor of influence, is expressed as:

R＝R ₁·R ₂·R ₃·R ₄

Wherein, R ₁for the effect of distance factor of this crossing and Adjacent Intersections, R ₂for cart proportion factor of influence in this crossing driving vehicle, R ₃for the travel speed factor of influence of 85% vehicle on these crossing main roads, R ₄for crossing geographic entity factor of influence;

Step (3): list value relation according to each parameter in model in step (2), wherein:

F value depends on the land use morphology that this crossing is got, if having primary school near crossing, the value of F is 1.2, if having market or first, high school near crossing, the value of F is 1.1, otherwise the value of F is 1,

R ₁value depend on the size of this crossing and Adjacent Intersections spacing, namely

$R_1=\left\{\begin{array}{cc}0.9& (d<200)\\ 1.04-\frac{0.29}{2^{d/210}}& (d\&GreaterEqual;200)\end{array}\right.$

Wherein, d is the spacing of this crossing and Adjacent Intersections, and unit is rice;

R ₂value depend on ratio P in this crossing driving vehicle shared by cart _t:

$R_2=\left\{\begin{array}{cc}1& (P_t\&le;5\%)\\ 0.96+P_t& (5\%<P_t\&le;20\%)\\ 1.16& (P_t>20\%)\end{array}\right.$

R ₃value depend on the size of the travel speed of 85% vehicle on these crossing main roads, namely

$R_3=\left\{\begin{array}{cc}1& (V\&le;50)\\ 1+\frac{V-50}{200}& (<V\&le;80)\\ 1.15& (V>80)\end{array}\right.$

Wherein, V is the travel speed of 85% vehicle on these crossing main roads, and unit is thousand ms/h;

R ₄value depend on the geographic entity of this crossing, namely

$R_4=\left\{\begin{array}{cc}1.25& (\mathrm{pop}\&GreaterEqual;\mathrm{500,000})\\ 1.15& (\mathrm{200,000}<\mathrm{pop}<\mathrm{5000,000})\\ 1& (\mathrm{pop}\&le;\mathrm{200,000})\end{array}\right.$

Wherein, pop is the population size number on this crossing, and unit behaves;

Here, constant value K is got ₁be 1350, K ₂be 4500;

Step (4): according to the different values of each variable in step (3), calculates this crossing and arranges motor vehicle signal lamp according to value W;

Step (5): specify this crossing that the threshold value W of motor vehicle signal lamp is set ₀, when the W calculated in step (4) is greater than threshold value W ₀time, then this crossing needs to arrange motor vehicle signal lamp.