CN102682598B - Traffic information distribution method capable of eliminating oscillation - Google Patents

Abstract

The invention discloses a traffic information distribution method capable of eliminating oscillation, which includes the steps of: 1) installing traffic flow detection equipments on all traffic monitoring stations to record the parameters of the traffic flow; 2) computing the vehicle traveling OD(Origin-Destination) information at traffic diversion junctions through the OD backstepping technique; 3) computing the expected load level of a road section and estimating and comparing the expected load of the road section with the load level of an alternative road section; and 4) computing the fluctuation of the distributed information through a driver stimulation reaction model and building an information distribution dynamic area to distribute the information. With the method, the routes of the travelers can be optimal, and the benefit of the road network can be the maximum at the same time, smooth traffic circulation of the road network is ensured in time and traffic oscillation is reduced as much as possible.

Description

A kind of traffic information distribution method that can oscillation-damped

Technical field

The present invention relates to a kind of traffic information distribution method, specifically can eliminate the traffic information distribution method of traffic vibration.

Background technology

Traffic information system is an important component part of intelligent transportation system at present, its Main Function is that intelligent information is distributed to traveler, help the rational Selecting Travel Paths of traffic participant, finally reach traveler generalized cost and minimize with road network overall efficiency and maximize.

By retrieval, find, the research of relevant transport information issue mainly concentrates on three aspects both at home and abroad at present, and the one, by releasing news, make traveler path optimum; The 2nd, be based on the optimum of the current benefit of road network; The 3rd, by aggregate measures, make traveler path optimum and road network benefit maximum simultaneously.But these three kinds of methods nearly all there will be two kinds of how-do-you-dos, a kind of situation is exactly the more of information issue, and traveler is not known How to choose, thereby whole structure can not be given full play to; Most important a kind of situation has been to provide comparatively responsive information, impel so more traveler in shorter selection of time same path, thereby traffic congestion is transferred to this so-called optimum road from other roads, produced traffic oscillatory occurences, the result is just the contrary.

Summary of the invention

The object of the invention is for overcoming above-mentioned the deficiencies in the prior art, a kind of traffic information distribution method that can oscillation-damped is provided, the method makes in traffic circulation, not only can make traveler path optimum and road network benefit maximum simultaneously, and can guarantee in time that road grid traffic operates steadily, the least possible appearance traffic vibration.

For achieving the above object, the present invention adopts following technical proposals:

Traffic information distribution method that can oscillation-damped, step is as follows:

1) traffic flow checkout equipment is installed on all Traffic monitoring points, recording traffic stream information parameter;

2) adopt the anti-push technology of OD to calculate the vehicle driving OD information of shunting Nodes;

3) calculate section expected load degree; And judge with the contrast of the alternative section load of machinery systems;

4), by the amount of fluctuating of driver's irritant reaction model computing information issue, between structure information issue dynamic area, with this, release news.

Described step 2) concrete grammar is: take any one node and periphery road network in road network is unit, when traveler arrives O point, faces m kind and selects, and total n is individual in final destination, and wherein, m, n are natural number; According to the telecommunication flow information detecting on section in step 1), adopt the anti-push technology of maximum likelihood OD can try to achieve the travel amount from starting point to any one terminal.

The concrete grammar of described step 4) is

The first step, obtains OP according to the traffic detection information in step 1) ₁, OP ₂..., OP _mtraffic circulation load of machinery systems B on section ₁, B ₂..., B _m; O is step 2) in O point position, P ₁, P ₂..., P _mfor step 2) in m kind select, m is natural number, if directly this information is distributed to traveler, very easily occurs traffic oscillatory occurences;

Second step, is target according to traveler path optimization and network operation maximizing the benefits, calculates the expectation traffic loading degree C selecting on section ₁, C ₂..., C _m, m is natural number; Obviously, if this information is distributed to traveler, there is information overabundance phenomenon;

The 3rd step, the computing information issue amount of fluctuating Δ A ₁, Δ A ₂..., Δ A _m; M is natural number, and psychology is thought and met logarithmic relationship between quantity of stimulus and reacting dose, if information is issued to variable quantity as quantity of stimulus, can describe reacting dose with the variable quantity of the traffic load of machinery systems on section, and the pass between the two is:

${\mathrm{\Δ}}_i={\log }_{\mathrm{\α}}^{{\mathrm{\ΔA}}_i}---\left(1\right)$

In formula, Δ _ifor reacting dose, Δ A _ifor quantity of stimulus, α is model parameter;

As traffic control person, wish that road section traffic volume operation matching degree reaches expectation value, thus desired reacting dose Δ _i=| B _i-C _i|, the computing formula of amount of floating is:

${\mathrm{\ΔA}}_i={\mathrm{\α}}^{|B_i-C_i|}---\left(2\right)$

In formula, Δ _ifor reacting dose, Δ A _ifor quantity of stimulus, α is model parameter, B _ifor the actual traffic load of machinery systems (is B ₁, B ₂..., B _m), C _ifor expectation traffic loading degree (is C ₁, C ₂..., C _m), i is 1 to m natural number.

The 4th step, builds between transport information issue dynamic area, for any one section, if when expectation traffic loading degree is less than actual coincidence degree, be [B between dynamic area _i, min (1, B _i+ Δ A _i)], otherwise, between dynamic area, be [max (0, B _i-Δ A _i), B _i], the published method between this employing dynamic area not only makes traveler path optimum and road network benefit maximum simultaneously, and can effectively avoid traffic vibration.

The anti-push technology of OD in the present invention, maximum likelihood OD are anti-, and push technology is prior art, does not repeat them here.

The invention has the beneficial effects as follows, adopt the method to make in traffic circulation, not only can make traveler path optimum and road network benefit maximum simultaneously, and can guarantee in time that road grid traffic operates steadily, the least possible appearance traffic vibration.

Accompanying drawing explanation

Fig. 1 is step 2 of the present invention) middle routing schematic diagram;

Fig. 2 is control flow chart of the present invention;

Embodiment

Below in conjunction with drawings and Examples, the present invention is further described.

The traffic information distribution method that can eliminate traffic vibration, step is as follows:

(1) traffic flow checkout equipment is installed on all Traffic monitoring points, recording traffic stream information parameter.Adopt the anti-push technology of OD to calculate the vehicle driving OD information of shunting Nodes.

(2), by the amount of fluctuating of driver's irritant reaction model computing information issue, between structure information issue dynamic area, with this, release news.

The concrete grammar of step (1):

As shown in Figure 1, take any one node and periphery road network in road network is research unit, when traveler arrives O point, faces m kind and selects, and total n is individual in final destination, and m, n are natural number.According to the telecommunication flow information detecting on section, adopt the anti-push technology of maximum likelihood OD can try to achieve the travel amount from starting point to any one terminal.

Concrete basis and the implementation method of step (2):

The first step, can obtain OP according to traffic detection information ₁, OP ₂..., OP _mtraffic circulation load of machinery systems B on section ₁, B ₂..., B _m, m is natural number.If directly this information is distributed to traveler, very easily there is traffic oscillatory occurences.

Second step, is target according to traveler path optimization and network operation maximizing the benefits, calculates the expectation traffic loading degree C selecting on section ₁, C ₂..., C _m, m is natural number.Obviously, if this information is distributed to traveler, there is information overabundance phenomenon.

The 3rd step, the computing information issue amount of fluctuating Δ A ₁, Δ A ₂..., Δ A _m, m, n are natural number.This is core of the present invention, psychology is thought and is met logarithmic relationship between quantity of stimulus and reacting dose, if information is issued to variable quantity as quantity of stimulus, can reacting dose be described with the variable quantity of the traffic load of machinery systems on section, the pass between the two is:

${\mathrm{\Δ}}_i={\log }_{\mathrm{\α}}^{{\mathrm{\ΔA}}_i}---\left(1\right)$

In formula, Δ _ifor reacting dose, Δ A _ifor quantity of stimulus, α is model parameter.

As traffic control person, wish that road section traffic volume operation matching degree reaches expectation value, thus desired reacting dose Δ _i=| B _i-C _i|, the computing formula of amount of floating is:

${\mathrm{\ΔA}}_i={\mathrm{\α}}^{|B_i-C_i|}---\left(2\right)$

In formula, Δ _ifor reacting dose, Δ A _ifor quantity of stimulus, α is model parameter, B _ifor the actual traffic load of machinery systems (is B ₁, B ₂..., B _m), C _ifor expectation traffic loading degree (is C ₁, C ₂..., C _m), i is 1 to m natural number.

The 4th step, builds between transport information issue dynamic area.For any one section, if when expectation traffic loading degree is less than actual coincidence degree, be [B between dynamic area _i, min (1, B _i+ Δ A _i)], otherwise, between dynamic area, be [max (0, B _i-Δ A _i), B _i].Published method between this employing dynamic area not only makes traveler path optimum and road network benefit maximum simultaneously, and can effectively avoid traffic vibration.

Although above-mentioned, by reference to the accompanying drawings the specific embodiment of the present invention is described; but be not limiting the scope of the invention; one of ordinary skill in the art should be understood that; on the basis of technical scheme of the present invention, those skilled in the art do not need to pay various modifications that creative work can make or distortion still in protection scope of the present invention.

Claims (1)

1. a traffic information distribution method that can oscillation-damped, is characterized in that, step is as follows:

1) traffic flow checkout equipment is installed on all Traffic monitoring points, recording traffic stream information parameter;

2) adopt the anti-push technology of OD to calculate the vehicle driving OD information of shunting Nodes;

3) calculate section expected load degree; And judge with the contrast of the alternative section load of machinery systems;

4), by the amount of fluctuating of driver's irritant reaction model computing information issue, between structure information issue dynamic area, with this, release news;

Described step 2) concrete grammar is: take any one node and periphery road network in road network is unit, when traveler arrives O point, faces m kind and selects, and total n is individual in final destination, and wherein, m, n are natural number; According to the telecommunication flow information detecting on section in step 1), adopt the anti-push technology of maximum likelihood OD can try to achieve the travel amount from starting point to any one terminal;

The concrete grammar of described step 4) is:

The first step, obtains OP according to the traffic detection information in step 1) ₁, OP ₂..., OP _mtraffic circulation load of machinery systems B on section ₁, B ₂..., B _m; O is step 2) in O point position, P ₁, P ₂..., P _mfor step 2) in m kind select, m is natural number;

Second step, is target according to traveler path optimization and network operation maximizing the benefits, calculates the expectation traffic loading degree C on the selection section in step 3) ₁, C ₂..., C _m, m is natural number;

The 3rd step, the computing information issue amount of fluctuating Δ A ₁, Δ A ₂..., Δ A _m; M is natural number, and psychology is thought and met logarithmic relationship between quantity of stimulus and reacting dose, if information is issued to variable quantity as quantity of stimulus, can describe reacting dose with the variable quantity of the traffic load of machinery systems on section, and the pass between the two is:

${\mathrm{\Δ}}_i={\log }_{\mathrm{\α}}^{\mathrm{\Δ}{A}_i}---\left(1\right)$

In formula, Δ _ifor reacting dose, Δ A _ifor quantity of stimulus, α is model parameter;

As traffic control person, wish that road section traffic volume operation matching degree reaches expectation value, thus desired reacting dose Δ _i=| B _i-C _i|, the computing formula of amount of floating is:

$\mathrm{\Δ}{A}_i={\mathrm{\α}}^{|B_i-C_i|}---\left(2\right)$

In formula, Δ _ifor reacting dose, Δ A _ifor quantity of stimulus, α is model parameter, B _ifor the actual traffic load of machinery systems is B ₁, B ₂..., B _m, C _ifor expectation traffic loading degree is C ₁, C ₂..., C _m, i is 1 to m natural number;

The 4th step, builds between transport information issue dynamic area, for any one section, if when expectation traffic loading degree is less than actual coincidence degree, be [B between dynamic area _i, min (1, B _i+ Δ A _i)], otherwise, between dynamic area, be [max (0, B _i-Δ A _i), B _i], the published method between this employing dynamic area not only makes traveler path optimum and road network benefit maximum simultaneously, and can effectively avoid traffic vibration.

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