Patent Application
20230057931
The present invention belongs to the field of Transportation and Traffic research as well as the methodologies behind them.
To update traffic control systems and conduct traffic studies, it is essential to have reliable, accurate and up-to-date data on traffic flows. However, these data are generally unavailable, not recent enough, imprecise or difficult to access.
In addition, there is no simple, efficient and economical method of collecting traffic data and the most reliable is still the manual method. This method involves sending a technician to the field to manually count traffic flows in all directions. This is a process that spans several days and must be repeated regularly to take into account changes in traffic flows, new developments or improvements to the road network. This is a tedious and expensive process that requires staff and frequent trips on the road network.
Data can also be collected by origin-destination (0/D) surveys, but this is an expensive and difficult method to optimize traffic light systems. Regarding data from mobile devices and GPS navigation systems, they are disseminated among several providers and there are legal, security and privacy issues to consider. In addition, it is necessary to take into account the latency problem which causes delays in satellite transmission. This problem can interfere with real-time interventions for traffic control.
There are also methods of collecting traffic data such as installing devices permanently along the roads. These are detectors or sensors generally connected to an on-site computer or to a laptop. The disadvantages of this method relate to the wide variety of equipment on the market, their installation, the difficulty of making them work correctly and the complexity of the data processing.
Our method is new and different from existing methods. This is a photogrammetric, triangulation and picture recognition approach. It provides for the installation of a series of georeferenced and synchronized cameras which will be able to measure traffic flows simultaneously on several intersections or sections of the roads. In addition to traffic flows, it makes it possible to measure the position, speed, acceleration and traffic density of vehicles, pedestrians, cyclists and any object that moves in the area under study and to process these data in a microscopic simulator or any kind of simulator. The data will also be accessible by secure means and by cloud computing.
Furthermore, some inventions have caught our attention, WO 2004/021303 “Method and device for determining traffic condition quantities” filed on 21 Aug. 2003 shows a method and arrangement for determining traffic condition variables. A video camera records video pictures of a lane with vehicles. This method determines traffic state variables, such as traffic flow speed and traffic density, from gray scale values of the video picture. This is a rough estimate of the traffic condition and it does not determine the exact position of vehicles, pedestrians, cyclists or any object moving on a road as we propose in our invention.
WO 95/25321 “Method of detecting traffic and traffic situations on roads, preferably motorways” filed Jan. 3, 1995. The method arranges measuring points for vehicle detection using traffic sensors and a traffic data processing arrangement for traffic control are used to determine at regular intervals traffic data, such as vehicle speed, traffic intensity and traffic density. And specific traffic parameters determined therefrom are formed in a traffic data processing system. This method calculates the average speed of traffic at regular intervals with sensors placed in sections across a road section and does not determine the exact position of vehicles, pedestrians, cyclists or any object. which moves on a road as we propose in our invention.
The main objective is to propose a practical method to count the flow of vehicles, pedestrians, cyclists or any object moving on a section of road and to measure the traffic density in order to be able to intervene in real time and at the right time to better control the traffic systems.
Another principal objective is to offer an automatic real-time solution of measuring the traffic flow on a road section or an intersection, the position at any moment of vehicles, pedestrians, cyclists and any moving object and to measure the density of traffic precisely in each section of road in real time. Another objective is to make these data readily and easily available to optimize the static traffic light systems of cities and agencies, to dynamically modify traffic light systems in real time, to dynamically modify traffic control systems (changing average vehicle speed, informing drivers for improving traffic flow, etc.), to carry out various traffic studies or for other uses related to transport and mobility.
The counting of vehicles could be done more frequently, it is less costly in the long run and it is more practical and simpler than the existing methods.
The present method offers a real-time solution of precise vehicle counting by the mean of high speed cameras shooting a very large number of pictures at road intersections or road sections. The pictures are taken every fraction of a second for example to identify and measure precisely the flow of vehicles, of pedestrians, cyclists, animals or of any other object moving on a section of the road or through an intersection. These pictures are transferred to a server by the 5G or any other fast and secure technology for processing. They can also be processed on site with the “edge computing” approach. Pictures processing is carried out by photogrammetric, triangulation and picture recognition approaches in order to extract the position of each vehicle, pedestrian, cyclist or any object and identify its x, y, z coordinates in a local or global referencing system. This method makes it possible to deduce the traffic flows in a faster and more practical way than the methods in force. It can also extract other useful information such as position, average speed or traffic density, which the manual counting method and other methods do not. These pictures and data will be immediately transferred through a fast and secure means for real-time use or stored on a server for processing and future use. The access to the data reported by the pictures are available in the cloud computing and could be used by cities, agencies, and other specialists in urban planning, transport or mobility.
My invention offers the present advantages:
Note: A microscopic simulator or micro-simulator reproduces the individual movements of vehicles, pedestrians or cyclists on a computer screen. The simulation makes it possible to test the efficiency of traffic control systems in force and to study traffic phenomena.
Note: A Traffic Management Center (TMC) aims to monitor traffic signals, intersections, and roads and proactively deploys traffic management strategies to reduce congestion and improve mobility and security. For the purposes of this invention, the Traffic Management Center shown in
These general disadvantages are avoided:
The present invention will be further understood from the following description with reference to the drawings wherein like numbers refer to like parts for easy identification.
In the following description and in the accompanying drawings, the numeral numbers refer to identical parts in the various Figures.
The Center of Analysis and Treatment 30 can transmit directly data 51 to the Traffic Management Center 34 by a fast and secure communication mean to permit to intervene dynamically and remotely to improve circulation and mobility, for example 58 to modify the sequences, cycles or phases of Traffic Lights System 48 in real time.
The links 58 between the Traffic Management Center 34 and the Traffic Lights System 48 is a secure mean of transmission like a dedicated Internet link, a fiber optic network or any secure and fast communication mean.
The pictures can be also transmit 44 directly to the cloud 28 where they are accessible to city, agencies, public bodies, or others 34 for some studies for example.
The city, agencies, public bodies, or others 34 now can access 52 the real-time traffic data from the cloud at any time and according to their needs.
The cities, agencies and public bodies can operate and optimize more frequently Traffic Lights Systems 48 with the data obtained 52 and previously processed by the Center of Analysis and Treatment 30.
The city, agencies, public bodies or others receive also 51 some interventions or suggestions in real-time from the Center of Analysis and Treatment 30, for example, they may receive real-time traffic data just collected directly from the center 30 to avoid latency's loss. The links 51 can be for example a secure mean of transmission like a dedicated internet link, a direct communication network, a fiber optic network or any secure and fast communication mean.
The present invention is a method 20 of measuring real-time traffic data, accessing and processing that data by cloud computing.
The method utilizes high-speed cameras 36,36′,54,54′ connected to the 5G directly or via small antennas or transmission accessories 22,24. The 5G can be replace by any other fast and secure technology.
The high-speed cameras are installed in a suitable place or on the roadside ready to take pictures of a road section or an intersection of the road where are moving vehicles, pedestrians, cyclists, animals, or any other object.
The pictures are taken simultaneously like every fraction of a second to be able to identify vehicles, pedestrians, cyclists, animals or any other object moving on a section of the road or through an intersection and to be able to measure their position at every moment.
These cameras are georeferenced and synchronised to know the exact position (x, y, z) of vehicles, people, cyclists or other objects that are moving at any time.
Several cameras will be able to operate in a synchronized manner to compare the position of vehicles, people or other moving objects and thus increase the accuracy of the data.
The pictures will be sent to a Center of Analysis and Treatment 30 to be processed, these pictures will allow, after automated processing by artificial vision algorithm and triangulation or others approaches to recognize the exact position every split second of vehicles, pedestrians, cyclists or any other object that moves on a section of road or through an intersection.
In order to identify vehicles, pedestrians, objects or other moving objects in different lighting and visibility conditions, such as during the night and in various climatic conditions, lidar sensors and infrared cameras can be use in a similar fashion.
After processing the pictures, it will be possible to accurately measure traffic flows in all directions without installing expensive devices and without connecting them to the infrastructure or IT systems of a city or an agency. These data will be processable in the right format and accessible in the cloud to reduce data collection costs, field trips to collect data, and for easily and more frequently updating Traffic Light Systems. It will also allow transferring the data collected into a micro-simulator or any kind of simulator in order to better understand traffic phenomena, to develop more effective solutions adapted to the context, driving habits and local culture, and to carry out scientific research and new knowledge.
The data obtained after the treatment of the pictures are sent 50 in the cloud 28 and will be made available 52 to the Traffic Management Center 34 of cities, agencies, public bodies or others for different purposes; for example the management of traffic lights, the management of traffic control systems, carrying out studies and analyzes related to transport and urban planning. The city or agency can also update Traffic Lights Systems more frequently, especially static systems that should be updated every three years, but the majority of them are not updated frequently enough. The Traffic Management Center of cities, agencies and public bodies can receive real-time interventions or suggestions to improve traffic from the Center of Analysis and Treatment 30, by a fast and secure communication mean 51 in order to avoid latency's problems.
A method for collecting and measuring real-time traffic data and to make them accessible through the cloud computing comprising the following steps:
These portions of the road are road sections or intersections.
The Center of Analysis and Treatment 30 processes the pictures by determining the area, the average volume, the position occupied by each of said vehicle, pedestrian, cyclist, animal or any moving object on said portion of said road and calculates their position (x, y, z) according to a local or global coordinate system to obtain said real-time traffic data.
The Center of Analysis and Treatment 30 can processes pictures with artificial intelligence approaches to obtain the real-time traffic data.
The high speed georeferenced-cameras shoot pictures at a very high speed; every fraction of a second.
The city, agency or public body is connected to the cloud for easy accessing the real-time traffic data, and may receive directly real-time interventions or suggestions from the Center of Analysis and Treatment 30 by a fast and secure communication mean 51, in order to avoid latency's problems. The city, agency or public body can manage transport and urban planning by the mean of these traffic data. An example of management is a city that remotely controls a Traffic Lights System 48 from a Traffic Management Center 34 and the Traffic Lights System 48 by a fast and secure mean of transmission like a dedicated internet link, a fiber optic network or any secure and fast communication mean.
The 5G can be modified, adapted, updated, renamed, or replaced over time by the responsible authorities or according to the rules of international standardization. The 5G can be replace by any other fast and secure technology.
In different lighting and visibility conditions on the roadside infrared cameras and lidar sensors can be used.
The real-time traffic data can be anonymized to respect privacy issues.
It is to be clearly understood that the instant description with reference to the annexed drawing is made in an indicative manner and that the preferred embodiments described herein are meant in no way to limit further embodiments realizable within the scope of the invention. The matter which is claimed as being inventive and new is limited only by the following claims.
