CN109035754B

CN109035754B - Road condition analysis method, road condition analysis device, server and computer readable storage medium

Info

Publication number: CN109035754B
Application number: CN201710439453.8A
Authority: CN
Inventors: 陆冬; 李佳丽
Original assignee: Beijing Didi Infinity Technology and Development Co Ltd
Current assignee: Beijing Didi Infinity Technology and Development Co Ltd
Priority date: 2017-06-12
Filing date: 2017-06-12
Publication date: 2020-09-22
Anticipated expiration: 2037-06-12
Also published as: CN109035754A

Abstract

The invention provides a road condition analysis method, a road condition analysis device, a server and a computer readable storage medium, wherein the road condition analysis method comprises the following steps: calculating a direction unbalance index of the bidirectional driving road section according to the environmental parameter record and the preset parameter of the bidirectional driving road section in a specified time period; and judging whether the bidirectional driving lane forms a tidal lane or not according to the direction unbalance index. Through the technical scheme of the invention, the tidal lane can be quickly and effectively identified, guidance is given to road reconstruction and transformation work of traffic management related departments, and the traffic jam phenomenon of the tidal lane is effectively and timely improved.

Description

Road condition analysis method, road condition analysis device, server and computer readable storage medium

Technical Field

The invention relates to the technical field of intelligent traffic, in particular to a road condition analysis method, a road condition analysis device, a server and a computer readable storage medium.

Background

In the morning, most of the trips are routed from the place of residence to the place of employment, and in the evening, most of the trips are routed from the place of employment to the place of residence, resulting in a severe imbalance in the direction of traffic distribution, severe congestion of the lane in one direction of travel, and a low utilization of the lane resources in the other direction of travel, so-called tidal lanes.

In the related art, in order to reasonably reduce road congestion and balance the utilization rate of roads, it is usually determined whether a tidal lane is formed by manual observation of a traffic police department, or image acquisition of a specified road section, or indirect determination of traffic flow through a velometer, and the like, and the above prior art has many technical defects:

(1) a great deal of manpower is wasted for equipment maintenance of manual observation and image acquisition;

(2) real-time image acquisition can result in large amounts of redundant data accumulation;

(3) the mode of indirectly determining the traffic flow by the speed measurement is also influenced by factors such as vehicle conditions, proficiency of drivers and the like, and the accuracy of indirect measurement is not high.

Disclosure of Invention

The present invention is directed to solving at least one of the problems of the prior art or the related art.

Therefore, an object of the present invention is to provide a road condition analyzing method.

Another object of the present invention is to provide a traffic analysis apparatus.

It is yet another object of the present invention to provide a server.

It is yet another object of the present invention to provide a computer-readable storage medium.

In order to achieve the above object, a technical solution of a first aspect of the present invention provides a road condition analysis method, including: calculating a direction unbalance index of the bidirectional driving road section according to the environmental parameter record and the preset parameter of the bidirectional driving road section in a specified time period; and judging whether the bidirectional driving lane forms a tidal lane or not according to the direction unbalance index.

In the technical scheme, the tide phenomenon in the traffic condition analysis reflects a traffic flow unbalance phenomenon similar to natural tide, for example, the traffic flow of a lane entering a city in an early peak period is large, the traffic flow of a lane leaving the city in the early peak period is small, correspondingly, the traffic flow of a lane leaving the city in the late peak period is large, in order to improve the utilization rate of road resources, the tide transformation is performed on the lane with the tide phenomenon, namely, the lane is variable through the tide transformation, and the tide lane is a lane which has the tide phenomenon and supports the lane transformation.

Specifically, the direction unbalance index of the bidirectional driving road section is calculated according to the environmental parameter record and the preset parameters of the bidirectional driving road section, the influence of factors such as environmental conditions and traffic accidents is considered, the accuracy and the validity of the direction unbalance index of the bidirectional driving road section are improved, whether the bidirectional driving lane forms a tidal lane or not is judged according to the direction unbalance index, the direction unbalance index is used for indicating the traffic flow unbalance degree of the two driving directions of the bidirectional driving road section, when the traffic flow unbalance degree of the two driving directions of the bidirectional driving road section is large, the tidal lane is formed, therefore, the efficiency of tidal lane identification is improved by calculating the direction unbalance index, timely guidance can be made for road reconstruction work of related departments, and lane phenomenon is favorably improved.

The calculated direction imbalance index can be compared with the preset condition of the tidal lane, when the direction imbalance index meets the preset condition of the tidal lane, the coordinates and time records of the driving road section corresponding to the direction imbalance index are stored, the data are transferred to see the road needing tidal reconstruction, and the working efficiency can be further improved, for example, the preset condition of the tidal lane is that the direction imbalance index is greater than or equal to 70%.

In addition, the traffic flow unbalance condition of the specific driving road section in specific time can be identified, the direction unbalance index can be manually checked, whether the driving road section in the time is necessary for tidal reconstruction or not can be judged, and the pertinence is strong.

When the driving road section needs tide reconstruction, the driving direction of the lane can be controlled by the indication direction change of the lane lamp to adjust the number of lanes, and the traffic police department can adjust the number of lanes in different driving directions of the two-way driving road section by the zipper vehicle to balance the traffic flow in two driving directions, and the traffic jam phenomenon of the two-way driving road section can be improved by manual command, for example, the two-way driving lane comprises four lanes in the city entering direction and four lanes in the city exiting direction, the jam delay index of the four lanes in the city entering direction is obviously higher than that of the four lanes in the city exiting direction in the early peak period, the zipper vehicle can be used to re-divide the lane into six lanes in the city entering direction and two lanes in the city exiting direction, and/or the red light duration time of the crossroad indicator lamp in the city entering direction is shortened, and/or the green light duration time of the crossroad indicator lamp in the city entering direction is prolonged, and/or puncturing the green isolation belt and shunting the lane again by adopting the automatic lifting piles.

In the above technical solution, preferably, before calculating the directional imbalance index of the bidirectional travel section according to the environmental parameter record and the preset parameter of the bidirectional travel section, the method further includes: and pre-storing a first corresponding relation between historical environmental parameter records and free passage time, wherein the historical environmental parameter records are historical data of the collected environmental parameter records.

In the technical scheme, the first corresponding relation between the historical environmental parameter record and the free passing time is prestored, so that the realization of determining the corresponding corrected free passing time according to the environmental parameter record in the specified time period is facilitated, and the accuracy of calculating the directional unbalance index is further improved.

In any of the above technical solutions, preferably, the method further includes: dividing the bidirectional driving road section into at least one road element corresponding to a single driving direction according to a preset division algorithm, and recording all road elements of the driving road section of the single driving direction as a group of road element set, wherein the single driving direction is a first driving direction or a second driving direction; when the environmental parameter record in the appointed time period is obtained, correcting the free passing time according to the first corresponding relation to obtain the corrected free passing time; when the congestion delay index of a single driving direction is determined, the passing time of all road elements in a group of road element sets of the single driving direction is obtained; determining a second corresponding relation between the preset parameters and any path element; determining preset weight values of all road elements of a group of road element sets in a single driving direction according to the second corresponding relation; calculating the congestion delay index in a single driving direction according to the calculation formula of the passing time, the corrected free passing time, the preset weight value and the preset congestion delay index, wherein the calculation formula of the preset congestion delay index comprises the following steps:

wherein n is an integer greater than or equal to 1, t_nTime of passage, T, of the nth road element representing a single direction of travel_nModified free-passage time, W, of the nth road element representing a single direction of travel_nAnd representing the preset weight value of the nth road element in the single driving direction.

According to the technical scheme, the bidirectional driving road section is divided into at least one road element corresponding to a single driving direction through a preset division algorithm, all road elements of the driving road section in the single driving direction are recorded as a group of road element set, the single driving direction is the first driving direction or the second driving direction, the feasibility of road condition analysis is improved, and each road element has a starting point coordinate, a terminal point coordinate and length information.

The preset division algorithm comprises the steps of dividing a road section into a plurality of road elements with equal length, dividing the road section into the plurality of road elements by using an outlet (such as an outlet of a high-speed road section or an indicator light intersection) in the road section, in addition, correspondingly adjusting the length of the road elements according to the speed limit difference of the road section, and adjusting the length of the road elements according to environmental parameter records.

When the environmental parameter record in the appointed time period is obtained, the free passing time is corrected according to the first corresponding relation, the corrected free passing time is obtained, the calculation accuracy of the congestion delay index and the direction unbalance index can be further improved, and the accuracy of tidal lane identification is further improved.

The real-time acquisition of the transit time is realized by acquiring the transit time of all the road elements in a set of road element sets in a single driving direction when the congestion delay index in the single driving direction is determined, wherein, the passing time refers to the time of the target vehicle passing on the road element, the passing time of the target vehicle actively reported by the driver client, after the server side filters the abnormal passing time, the acquired traffic time of a large number of acquired vehicles is averaged, the obtained average value of the traffic time is the traffic time of the target vehicle in the road element in the preset time period, and further, in order to improve the accuracy of the acquired transit time, a vehicle with good driving record and low accident rate can be selected as a target vehicle, in addition, the free transit time is theoretical transit time under the condition that the road element is clear, for example, a quotient obtained by dividing the length of the road section by the upper limit of the speed is an acquisition method of the free transit time.

Through obtaining the passing time, the free passing time and the preset weight value of all road elements in a group of road element sets in a single driving direction, data support is provided for calculation of the congestion delay index, the validity of the congestion delay index is further improved, and the traffic congestion degree of a driving road section in the single driving direction can be timely and effectively reflected.

In addition, the preset weight value is mainly influenced by factors such as historically stored traffic flow, population density, frequent traffic accident areas and the like, and the free passage time is influenced by factors such as environment, positions of the traveling road sections and limited speeds of the traveling road sections.

In any of the above technical solutions, preferably, the method further includes: and carrying out weighted summation processing on the air quality index, the rainfall index, the humidity index, the visibility index and the wind speed index of the bidirectional driving road section in a specified time period, and recording the result of the weighted summation processing as an environmental parameter record.

According to the technical scheme, the air quality index, the rainfall index, the humidity index, the visibility index and the wind speed index of the bidirectional driving road section in the specified time period are subjected to weighted summation processing, the result of the weighted summation processing is recorded as an environmental parameter record, a plurality of environmental factors influencing the driving speed of the vehicle are comprehensively considered, the effectiveness of the environmental parameter record is improved, the corresponding corrected free passing time is determined according to the environmental parameter record, the possibility that the congestion delay index is inaccurate due to the environmental factors is reduced, the congestion delay index is further corrected, and the identification accuracy of the tidal lane is further improved.

In any of the above technical solutions, preferably, in a specified time period, calculating a directional imbalance index of the bidirectional travel section according to the environmental parameter record of the bidirectional travel section and a preset parameter, specifically includes: and calculating a direction imbalance index of the bidirectional driving road section according to a calculation formula of a preset direction imbalance index when detecting that the congestion delay index of the first driving direction is greater than or equal to the preset congestion delay index or detecting that the congestion delay index of the second driving direction is greater than or equal to the preset congestion delay index in a specified time period, wherein the direction imbalance index is used for indicating the degree of traffic flow imbalance between the first driving direction and the second driving direction.

According to the technical scheme, when the congestion delay index of the first driving direction is detected to be larger than or equal to the preset congestion delay index or the congestion delay index of the second driving direction is detected to be larger than or equal to the preset congestion delay index in the specified time period, the direction imbalance index of the bidirectional driving road section is calculated according to the preset calculation formula of the direction imbalance index, prejudgment of tide lane identification is achieved, data calculation pressure is reduced, and accuracy and effectiveness of tide lane identification are improved.

In any of the above technical solutions, preferably, the preset calculation formula of the directional imbalance index includes:

DII characterizing the directional imbalance index, TTI_aCongestion delay index, TTI, characterizing a first direction of travel_bA congestion delay index, min (TTI), characterizing the second direction of travel_a，TTI_b) Characterization vs TTI_aAnd TTI_bPerforming minimum value processing, | TTI_a-TTI_bI characterization calculation TTI_aAnd TTI_bThe absolute value of the difference of (a).

In the technical scheme, the formula is used

The direction imbalance index is calculated to take the congestion delay index of the first driving direction of the bidirectional driving road section and the congestion delay index of the second driving direction of the bidirectional driving road section into consideration, so that the accuracy and the effectiveness of the direction imbalance index of the bidirectional driving road section are further improved, the accuracy and the effectiveness of tidal lane identification are improved, when the difference of the congestion conditions of the two driving directions is large and the road condition of one driving direction is good, the number of lanes is adjusted through tidal reconstruction, and the tidal congestion lane phenomenon of the driving road section can be effectively improved in time.

In any of the above technical solutions, preferably, the determining whether the bidirectional driving lane forms a tidal lane according to the directional imbalance index specifically includes: and when the congestion delay index of the first running direction is detected to be larger than or equal to the preset congestion delay index, or the congestion delay index of the second running direction is detected to be larger than or equal to the preset congestion delay index, and the direction imbalance index is larger than or equal to the preset direction imbalance index, judging that the bidirectional running road section forms a tidal lane in the specified time period.

According to the technical scheme, when the congestion delay index of the first running direction is detected to be larger than or equal to the preset congestion delay index, or the congestion delay index of the second running direction is detected to be larger than or equal to the preset congestion delay index, and the direction imbalance index is larger than or equal to the preset direction imbalance index, the bidirectional running road section is judged to form the tidal lane in the specified time period, the congestion delay index and the direction imbalance index are combined, the possibility that the running road section with congestion in the two running directions is judged to be the tidal lane by mistake is reduced, and the effectiveness and the accuracy of tidal lane identification are further improved.

A second aspect of the present invention provides a traffic analysis apparatus, including: the calculation unit is used for calculating the direction unbalance index of the bidirectional driving road section according to the environmental parameter record and the preset parameter of the bidirectional driving road section in the appointed time period; and the judging unit is used for judging whether the bidirectional driving lane forms a tidal lane or not according to the direction unbalance index.

In the above technical solution, preferably, the method further includes: the pre-storing unit is used for pre-storing a first corresponding relation between historical environmental parameter records and free passing time, wherein the historical environmental parameter records are historical data of collected environmental parameter records.

In any of the above technical solutions, preferably, the method further includes: the dividing unit is used for dividing the bidirectional driving road section into at least one road element corresponding to a single driving direction according to a preset dividing algorithm, and recording all the road elements of the driving road section of the single driving direction as a group of road element set, wherein the single driving direction is a first driving direction or a second driving direction; the correction unit is used for correcting the free passage time according to the first corresponding relation when the environmental parameter record in the appointed time period is obtained, so that the corrected free passage time is obtained; the traffic delay control device comprises an acquisition unit, a processing unit and a control unit, wherein the acquisition unit is used for acquiring the passing time of all road elements in a set of road element sets in a single driving direction when the congestion delay index in the single driving direction is determined; the acquisition unit is further configured to: when the congestion delay index of a single driving direction is determined, the passing time of all road elements in a group of road element sets of the single driving direction is obtained; the determining unit is used for determining a second corresponding relation between the preset parameter and any path element; the determination unit is further configured to: determining preset weight values of all road elements of a group of road element sets in a single driving direction according to the second corresponding relation; the computing unit is further to: calculating the congestion delay index in a single driving direction according to the calculation formula of the traffic time, the corrected free traffic time, the preset weight value and the preset congestion delay index,

the preset congestion delay index calculation formula comprises the following steps:

In any of the above technical solutions, preferably, the calculating unit is further configured to: and carrying out weighted summation processing on the air quality index, the rainfall index, the humidity index, the visibility index and the wind speed index of the bidirectional driving road section in a specified time period, and recording the result of the weighted summation processing as an environmental parameter record.

In any of the above technical solutions, preferably, the calculating unit is further configured to: and calculating a direction imbalance index of the bidirectional driving road section according to a calculation formula of a preset direction imbalance index when detecting that the congestion delay index of the first driving direction is greater than or equal to the preset congestion delay index or detecting that the congestion delay index of the second driving direction is greater than or equal to the preset congestion delay index in a specified time period, wherein the direction imbalance index is used for indicating the degree of traffic flow imbalance between the first driving direction and the second driving direction.

In the technical scheme, the formula is used

In any one of the above technical solutions, preferably, the determining unit is further configured to: and when the congestion delay index of the first running direction is detected to be larger than or equal to the preset congestion delay index, or the congestion delay index of the second running direction is detected to be larger than or equal to the preset congestion delay index, and the direction imbalance index is larger than or equal to the preset direction imbalance index, judging that the bidirectional running road section forms a tidal lane in the specified time period.

The third aspect of the present invention provides a server, which includes a memory, a processor, and a computer program stored in the memory and capable of running on the processor, wherein the processor implements any one of the steps of the road condition analysis method when executing the computer program.

In a fourth aspect of the present invention, a computer-readable storage medium is provided, on which a computer program is stored, and the computer program is executed by a processor to implement the steps of any one of the above road condition analysis methods.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

fig. 1 shows a schematic flow chart of a road condition analysis method according to an embodiment of the invention;

fig. 2 is a schematic block diagram of a traffic analysis apparatus according to an embodiment of the present invention.

Detailed Description

In order that the above objects, features and advantages of the present invention can be more clearly understood, a more particular description of the invention will be rendered by reference to the appended drawings. It should be noted that the embodiments and features of the embodiments of the present application may be combined with each other without conflict.

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced in other ways than those specifically described herein, and therefore the scope of the present invention is not limited by the specific embodiments disclosed below.

Example 1

Fig. 1 shows a schematic flow chart of a road condition analysis method according to an embodiment of the present invention.

As shown in fig. 1, a traffic analysis method according to an embodiment of the present invention includes: step S102, calculating a direction unbalance index of the bidirectional driving road section according to the environmental parameter record and the preset parameter of the bidirectional driving road section in a specified time period; and step S104, judging whether the bidirectional driving lane forms a tidal lane or not according to the direction unbalance index.

In this embodiment, the tidal phenomenon in the traffic condition analysis reflects a traffic imbalance phenomenon similar to natural tides, for example, the traffic flow of the traffic lane entering the city in the early peak period is large, the traffic flow of the traffic lane leaving the city is small, correspondingly, the traffic flow of the traffic lane leaving the city in the late peak period is large, and the traffic flow of the traffic lane leaving the city is large.

In the above embodiment, preferably, before calculating the directional imbalance index of the bidirectional travel section according to the environmental parameter record and the preset parameter of the bidirectional travel section, the method further comprises: and pre-storing a first corresponding relation between historical environmental parameter records and free passage time, wherein the historical environmental parameter records are historical data of the collected environmental parameter records.

In the embodiment, the implementation of determining the corresponding corrected free passage time according to the environmental parameter record in the specified time period is facilitated by pre-storing the first corresponding relation between the historical environmental parameter record and the free passage time, and the accuracy of calculating the directional unbalance index is further improved.

In any of the above embodiments, preferably, the method further includes: dividing the bidirectional driving road section into at least one road element corresponding to a single driving direction according to a preset division algorithm, and recording all road elements of the driving road section of the single driving direction as a group of road element set, wherein the single driving direction is a first driving direction or a second driving direction; when the environmental parameter record in the appointed time period is obtained, correcting the free passing time according to the first corresponding relation to obtain the corrected free passing time; when the congestion delay index of a single driving direction is determined, the passing time of all road elements in a group of road element sets of the single driving direction is obtained; determining a second corresponding relation between the preset parameters and any path element; determining preset weight values of all road elements of a group of road element sets in a single driving direction according to the second corresponding relation; calculating the congestion delay index in a single driving direction according to the calculation formula of the passing time, the corrected free passing time, the preset weight value and the preset congestion delay index, wherein the calculation formula of the preset congestion delay index comprises the following steps:

In this embodiment, the bidirectional travel road segment is divided into at least one road element corresponding to a single travel direction through a preset division algorithm, all road elements of the travel road segment in the single travel direction are recorded as a group of road element sets, the single travel direction is the first travel direction or the second travel direction, feasibility of road condition analysis is improved, and each road element has a start point coordinate, an end point coordinate and length information.

In any of the above embodiments, preferably, the method further includes: and carrying out weighted summation processing on the air quality index, the rainfall index, the humidity index, the visibility index and the wind speed index of the bidirectional driving road section in a specified time period, and recording the result of the weighted summation processing as an environmental parameter record.

In the embodiment, the air quality index, the rainfall index, the humidity index, the visibility index and the wind speed index of the bidirectional driving road section in the specified time period are subjected to weighted summation processing, the result of the weighted summation processing is recorded as the environmental parameter record, a plurality of environmental factors influencing the driving speed of the vehicle are comprehensively considered, the effectiveness of the environmental parameter record is improved, the corresponding corrected free transit time is determined according to the environmental parameter record, the possibility of inaccurate congestion delay index caused by the environmental factors is reduced, the congestion delay index is further corrected, and the identification accuracy of the tidal lane is further improved.

In any of the above embodiments, preferably, calculating the directional imbalance index of the bidirectional travel section according to the environmental parameter record of the bidirectional travel section and the preset parameter within the specified time period specifically includes: and calculating a direction imbalance index of the bidirectional driving road section according to a calculation formula of a preset direction imbalance index when detecting that the congestion delay index of the first driving direction is greater than or equal to the preset congestion delay index or detecting that the congestion delay index of the second driving direction is greater than or equal to the preset congestion delay index in a specified time period, wherein the direction imbalance index is used for indicating the degree of traffic flow imbalance between the first driving direction and the second driving direction.

In the embodiment, in a specified time period, when the congestion delay index of the first driving direction is detected to be greater than or equal to the preset congestion delay index, or the congestion delay index of the second driving direction is detected to be greater than or equal to the preset congestion delay index, the direction imbalance index of the bidirectional driving road section is calculated according to a calculation formula of the preset direction imbalance index, prejudgment of tidal lane identification is achieved, data calculation pressure is reduced, and accuracy and effectiveness of tidal lane identification are improved.

In any of the above embodiments, preferably, the formula for calculating the preset directional imbalance index includes:

In this embodiment, by formula

In any of the above embodiments, preferably, the determining whether the bidirectional driving lane forms a tidal lane according to the directional imbalance index specifically includes: and when the congestion delay index of the first running direction is detected to be larger than or equal to the preset congestion delay index, or the congestion delay index of the second running direction is detected to be larger than or equal to the preset congestion delay index, and the direction imbalance index is larger than or equal to the preset direction imbalance index, judging that the bidirectional running road section forms a tidal lane in the specified time period.

In the embodiment, when the congestion delay index of the first driving direction is detected to be greater than or equal to the preset congestion delay index, or the congestion delay index of the second driving direction is detected to be greater than or equal to the preset congestion delay index, and the direction imbalance index is greater than or equal to the preset direction imbalance index, the bidirectional driving road section is judged to form the tidal lane in the specified time period, the congestion delay index and the direction imbalance index are combined, the possibility that the driving road section with congestion in both driving directions is mistakenly judged as the tidal lane is reduced, and the effectiveness and the accuracy of tidal lane identification are further improved.

Example 2

Fig. 2 shows a traffic analysis device 200 according to an embodiment of the present invention.

As shown in fig. 2, a traffic analysis device 200 according to an embodiment of the present invention includes: the calculation unit 202 is used for calculating a direction unbalance index of the bidirectional driving road section according to the environmental parameter record and the preset parameter of the bidirectional driving road section in a specified time period; and the judging unit 204 is used for judging whether the bidirectional driving lane forms a tidal lane or not according to the direction unbalance index.

In the above embodiment, preferably, the method further includes: the pre-storing unit 206 is configured to pre-store a first corresponding relationship between a historical environmental parameter record and the free transit time, where the historical environmental parameter record is historical data of the collected environmental parameter record.

In any of the above embodiments, preferably, the method further includes: the dividing unit 208 is configured to divide the bidirectional travel road segment into at least one road element corresponding to a single travel direction according to a preset dividing algorithm, and record all road elements of the travel road segment in the single travel direction as a group of road element sets, where the single travel direction is a first travel direction or a second travel direction; the correcting unit 210 is configured to correct the free passage time according to the first corresponding relationship when the environmental parameter record in the specified time period is acquired, so as to obtain a corrected free passage time; an obtaining unit 212, configured to obtain transit times of all road elements of a set of road element sets in a single driving direction when determining a congestion delay index in the single driving direction; the obtaining unit 212 is further configured to: when the congestion delay index of a single driving direction is determined, the passing time of all road elements in a group of road element sets of the single driving direction is obtained; a determining unit 214, configured to determine a second corresponding relationship between the preset parameter and any route element; the determining unit 214 is further configured to: determining preset weight values of all road elements of a group of road element sets in a single driving direction according to the second corresponding relation; the computing unit 202 is further configured to: calculating the congestion delay index in a single driving direction according to the calculation formula of the traffic time, the corrected free traffic time, the preset weight value and the preset congestion delay index,

wherein n is an integer greater than or equal to 1, t_nTime of passage, T, of the nth road element representing a single direction of travel_nModified free-passage time, W, of the nth road element representing a single direction of travel_nN-th road representing single driving directionThe preset weight value of the element.

In any of the above embodiments, preferably, the computing unit 202 is further configured to: and carrying out weighted summation processing on the air quality index, the rainfall index, the humidity index, the visibility index and the wind speed index of the bidirectional driving road section in a specified time period, and recording the result of the weighted summation processing as an environmental parameter record.

In any of the above embodiments, preferably, the computing unit 202 is further configured to: and calculating a direction imbalance index of the bidirectional driving road section according to a calculation formula of a preset direction imbalance index when detecting that the congestion delay index of the first driving direction is greater than or equal to the preset congestion delay index or detecting that the congestion delay index of the second driving direction is greater than or equal to the preset congestion delay index in a specified time period, wherein the direction imbalance index is used for indicating the degree of traffic flow imbalance between the first driving direction and the second driving direction.

In this embodiment, by formula

Calculating the direction imbalance index to take into account the congestion delay index of the first driving direction of the bidirectional driving road section and the congestion delay index of the second driving direction of the bidirectional driving road section, and further improving the accuracy and effectiveness of the direction imbalance index of the bidirectional driving road section, so that the accuracy and effectiveness of tidal lane identification are improvedWhen the difference of the congestion conditions in the driving directions is large and the road condition of one driving direction is good, the number of lanes is adjusted through tidal reconstruction, and the traffic congestion tidal lane phenomenon of the driving road section can be effectively improved in time.

In any of the above embodiments, preferably, the determining unit 204 is further configured to: and when the congestion delay index of the first running direction is detected to be larger than or equal to the preset congestion delay index, or the congestion delay index of the second running direction is detected to be larger than or equal to the preset congestion delay index, and the direction imbalance index is larger than or equal to the preset direction imbalance index, judging that the bidirectional running road section forms a tidal lane in the specified time period.

Example 3

According to one embodiment of the invention, a server includes a memory, a processor, and a computer program stored on the memory and executable on the processor, the processor implementing the following steps when executing the computer program: calculating a direction unbalance index of the bidirectional driving road section according to the environmental parameter record and the preset parameter of the bidirectional driving road section in a specified time period; and judging whether the bidirectional driving lane forms a tidal lane or not according to the direction unbalance index.

In this embodiment, by formula

Example 4

A computer-readable storage medium according to an embodiment of the invention, on which a computer program is stored which, when executed by a processor, performs the steps of: calculating a direction unbalance index of the bidirectional driving road section according to the environmental parameter record and the preset parameter of the bidirectional driving road section in a specified time period; and judging whether the bidirectional driving lane forms a tidal lane or not according to the direction unbalance index.

In this embodiment, by formula

The technical scheme of the invention is explained in detail by combining the attached drawings, and the invention provides a road condition analysis method, a device, a server and a computer readable storage medium, wherein whether a bidirectional driving lane forms a tidal lane is judged according to a direction unbalance index of the bidirectional driving road section calculated according to environmental parameter records and preset parameters of the bidirectional driving road section in a specified time period, so that the tidal lane can be quickly and effectively identified, the road reconstruction work of related departments of traffic control is guided, and the traffic jam phenomenon of the tidal lane is effectively and timely improved.

In summary, the road condition analysis scheme according to the embodiment of the present invention at least can achieve the expected technical effects, including:

(1) on one hand, the image acquisition equipment does not need to be manually maintained and the road condition is not needed to be observed, the road condition of the running road section in the appointed time period can be analyzed according to the vehicle running record fed back by the client, the appointed time period can be a preset peak time period, a monitoring time period determined based on the vehicle running record statistics stored in history, or a special time period determined according to the request of the client, if a certain road section is blocked due to a traffic accident, the client can trigger the server to enter the road condition analysis of the appointed time period through a reporting request, and inform a traffic management department.

(2) On the other hand, the direction imbalance index is determined by the fed-back vehicle running records and the environmental parameter records, and the server (cluster) can actively grab or passively receive the vehicle running records, but in short, the server belongs to a big data analysis method, so that the large number of samples can overcome abnormal data of individual samples (for example, the vehicle speed is too slow due to unskilled driving of a driver), and further overcome the inaccuracy problem caused by indirect measurement such as a velometer.

(3) On the other hand, environmental parameter records can be pre-estimated according to weather forecast in a specified time period, the environmental parameter records can also be obtained through real-time monitoring, and the problem of inaccurate tide lane identification caused by environmental influence is solved through correcting the direction unbalance index through the environmental parameter records.

The steps in the method of the invention can be sequentially adjusted, combined and deleted according to actual needs.

The units in the device of the invention can be merged, divided and deleted according to actual needs.

It will be understood by those skilled in the art that all or part of the steps in the methods of the embodiments described above may be implemented by instructions associated with a program, which may be stored in a computer-readable storage medium, where the storage medium includes Read-Only Memory (ROM), Random Access Memory (RAM), Programmable Read-Only Memory (PROM), Erasable Programmable Read-Only Memory (EPROM), One-time Programmable Read-Only Memory (OTPROM), Electrically Erasable Programmable Read-Only Memory (EEPROM), compact disc-Read-Only Memory (CD-ROM), or other Memory, magnetic disk, magnetic tape, or magnetic tape, Or any other medium which can be used to carry or store data and which can be read by a computer.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A road condition analysis method is characterized by comprising the following steps:

calculating a direction unbalance index of a bidirectional driving road section according to an environmental parameter record and a preset parameter of the bidirectional driving road section in a specified time period;

the specified time period is a preset peak time period or a monitoring time period determined based on vehicle running record statistics stored in history or a special time period determined according to a client request;

judging whether the bidirectional driving lane forms a tidal lane or not according to the direction unbalance index;

before calculating the directional unbalance index of the bidirectional driving road section according to the environmental parameter record and the preset parameter of the bidirectional driving road section, the method further comprises the following steps:

pre-storing a first correspondence between historical environmental parameter records and free transit times,

wherein the historical environmental parameter record is the historical data of the collected environmental parameter record;

the road condition analysis method further comprises the following steps: dividing the bidirectional driving road section into at least one road element corresponding to a single driving direction according to a preset division algorithm, and recording all road elements of the driving road section in the single driving direction as a group of road element set, wherein the single driving direction is a first driving direction or a second driving direction;

when the environmental parameter record in the appointed time period is obtained, correcting the free passing time according to the first corresponding relation to obtain the corrected free passing time;

when the congestion delay index of the single driving direction is determined, acquiring the passing time of all road elements of a group of road element sets of the single driving direction;

calculating the congestion delay index of the single driving direction according to the passing time, the corrected free passing time, a preset weight value and a preset calculation formula of the congestion delay index;

weighting and summing the air quality index, the rainfall index, the humidity index, the visibility index and the wind speed index of the bidirectional driving road section in the appointed time period, and recording the result of the weighting and summing as the environmental parameter record;

in a specified time period, calculating a directional imbalance index of a bidirectional travel road section according to an environmental parameter record and preset parameters of the bidirectional travel road section, wherein the method specifically comprises the following steps:

and in the specified time period, when the congestion delay index of the first running direction is detected to be greater than or equal to a preset congestion delay index, or the congestion delay index of the second running direction is detected to be greater than or equal to the preset congestion delay index, calculating the direction imbalance index of the bidirectional running road section according to a preset calculation formula of the direction imbalance index.

2. The traffic condition analysis method according to claim 1, further comprising:

determining a second corresponding relation between the preset parameters and any road element;

determining the preset weight values of all road elements in a group of road element sets in the single driving direction according to the second corresponding relation;

the preset congestion delay index calculation formula comprises:

wherein n is characterized as an integer greater than or equal to 1, and t_nA transit time of an nth road element characterizing said single direction of travel, said T_nA revised free-passage time of the nth road element characterizing said single direction of travel, said W_nAnd representing the preset weight value of the nth road element in the single driving direction.

3. The traffic analysis method according to claim 2,

the directional imbalance index is used to indicate a degree of vehicle flow imbalance between the first direction of travel and the second direction of travel.

4. The traffic analysis method according to claim 3,

the preset calculation formula of the directional imbalance index comprises:

the DII characterizes the directional imbalance index, the TTI_aA congestion delay index characterizing the first direction of travel, the TTI_bAn index of congestion delay characterizing the second direction of travel, said min (TTI)_a，TTI_b) Characterization for the TTI_aAnd said TTI_bPerforming minimum value taking processing, wherein the | TTI_a-TTI_bI characterisation calculating the TTI_aAnd said TTI_bThe absolute value of the difference of (a).

5. The road condition analysis method according to any one of claims 2 to 4, wherein judging whether the bidirectional driving lane forms a tidal lane according to the directional imbalance index specifically comprises:

and when the congestion delay index of the first running direction is detected to be larger than or equal to a preset congestion delay index, or the congestion delay index of the second running direction is detected to be larger than or equal to the preset congestion delay index, and the direction imbalance index is larger than or equal to a preset direction imbalance index, determining that the bidirectional running road section forms the tidal lane in the specified time period.

6. A road condition analysis device, comprising:

the calculation unit is used for calculating the direction unbalance index of the bidirectional driving road section according to the environmental parameter record and the preset parameter of the bidirectional driving road section in the appointed time period;

the judging unit is used for judging whether the bidirectional driving lane forms a tidal lane or not according to the direction unbalance index;

the system comprises a pre-storing unit, a judging unit and a judging unit, wherein the pre-storing unit is used for pre-storing a first corresponding relation between historical environmental parameter records and free passing time, and the historical environmental parameter records are collected historical data of the environmental parameter records;

the dividing unit is used for dividing the bidirectional driving road section into at least one road element corresponding to a single driving direction according to a preset dividing algorithm, and recording all the road elements of the driving road section in the single driving direction as a group of road element set, wherein the single driving direction is a first driving direction or a second driving direction;

the correction unit is used for correcting the free passage time according to the first corresponding relation when the environmental parameter record in the specified time period is obtained, so that the corrected free passage time is obtained;

the obtaining unit is used for obtaining the passing time of all road elements in a group of road element sets in the single driving direction when the congestion delay index of the single driving direction is determined;

the computing unit is further to: calculating the congestion delay index of the single driving direction according to the passing time, the corrected free passing time, a preset weight value and a preset calculation formula of the congestion delay index;

wherein the computing unit is further configured to: carrying out weighted summation processing on the air quality index, the rainfall index, the humidity index, the visibility index and the wind speed index of the bidirectional driving road section in the appointed time period, and recording the result of the weighted summation processing as the environmental parameter record;

the computing unit is further to: and in the specified time period, when the congestion delay index of the first running direction is detected to be greater than or equal to a preset congestion delay index, or the congestion delay index of the second running direction is detected to be greater than or equal to the preset congestion delay index, calculating the direction imbalance index of the bidirectional running road section according to a preset calculation formula of the direction imbalance index.

7. The traffic analysis device of claim 6,

the traffic condition analysis device further includes:

the determining unit is used for determining a second corresponding relation between the preset parameter and any road element;

the determination unit is further configured to: determining preset weight values of all road elements in a group of road element sets in the single driving direction according to the second corresponding relation;

the preset congestion delay index calculation formula comprises:

8. The traffic analysis device of claim 7,

9. The traffic analysis device of claim 8,

the preset calculation formula of the directional imbalance index comprises:

10. The traffic analyzing apparatus according to any one of claims 7 to 9,

the judging unit is further configured to: and when the congestion delay index of the first running direction is detected to be larger than or equal to a preset congestion delay index, or the congestion delay index of the second running direction is detected to be larger than or equal to the preset congestion delay index, and the direction imbalance index is larger than or equal to a preset direction imbalance index, determining that the bidirectional running road section forms the tidal lane in the specified time period.

11. A server comprising a memory, a processor and a computer program stored in the memory and operable on the processor, wherein the processor implements the steps of the traffic analysis method according to any one of claims 1 to 5 when executing the computer program.

12. A computer-readable storage medium, on which a computer program is stored, wherein the computer program, when being executed by a processor, implements the steps of the traffic analysis method according to any one of claims 1 to 5.