EP2260481B1 - Systeme et procede d'information sur le trafic dans un reseau routier - Google Patents

Systeme et procede d'information sur le trafic dans un reseau routier Download PDF

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Publication number
EP2260481B1
EP2260481B1 EP09728407A EP09728407A EP2260481B1 EP 2260481 B1 EP2260481 B1 EP 2260481B1 EP 09728407 A EP09728407 A EP 09728407A EP 09728407 A EP09728407 A EP 09728407A EP 2260481 B1 EP2260481 B1 EP 2260481B1
Authority
EP
European Patent Office
Prior art keywords
network
information
points
information system
duration
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Not-in-force
Application number
EP09728407A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP2260481A1 (fr
Inventor
Claude Laurgeau
Arnaud De La Fortelle
Bruno Steux
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Association pour la Recherche et le Developpement des Methodes et Processus Industriels
Original Assignee
Association pour la Recherche et le Developpement des Methodes et Processus Industriels
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Publication date
Application filed by Association pour la Recherche et le Developpement des Methodes et Processus Industriels filed Critical Association pour la Recherche et le Developpement des Methodes et Processus Industriels
Priority to PL09728407T priority Critical patent/PL2260481T3/pl
Publication of EP2260481A1 publication Critical patent/EP2260481A1/fr
Application granted granted Critical
Publication of EP2260481B1 publication Critical patent/EP2260481B1/fr
Not-in-force legal-status Critical Current
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Classifications

    • G—PHYSICS
    • G08—SIGNALLING
    • G08G—TRAFFIC CONTROL SYSTEMS
    • G08G1/00—Traffic control systems for road vehicles
    • G08G1/01—Detecting movement of traffic to be counted or controlled
    • G08G1/0104—Measuring and analyzing of parameters relative to traffic conditions

Definitions

  • the present invention relates to a system and method for traffic information in a road network.
  • the measurement of road traffic is essentially carried out by counting vehicles traveling on the network.
  • both of these techniques have a major disadvantage in that they only allow the measurement of road traffic at points of the network where vehicle detection devices are installed, namely magnetic loops, cameras video, or other sensors.
  • the present invention relates to a traffic information system and method in a road network that does not have the disadvantages of the aforementioned systems and methods.
  • the server of the system according to the invention can be administered at a traffic management center.
  • the system and the information method according to the invention make it possible to estimate a travel time between two points of the network, based on travel times actually traveled by vehicles on the network.
  • the invention requires no intervention on the road network and can therefore be deployed at very low cost including in areas of low development.
  • the main idea of the invention is to make the measurement of traffic not on the infrastructure but on the vehicles themselves.
  • variable message panels which, in the current state of the art, present information on travel times between two points of the network obtain this information not from actual measurements of travel time, but from vehicle flow measurements on the network.
  • the present invention does not have these drawbacks, the travel time predictions can be very reliable from the first measurement of a real path.
  • the invention on the contrary makes it possible to reconstruct the traffic wherever the vehicles pass, and even in the vicinity, by exploiting the historical correlations.
  • the vehicles embody devices able to measure by themselves the actual travel time between two points of the network and to transmit these real times to the server via a wireless communication means.
  • the devices embedded in the vehicles communicate passing times to the various points of the network, the server calculating by itself the actual durations of the journeys traveled between two points of the network on the basis of this information.
  • the devices embedded in the vehicles transmit the information to the server via relays, and not directly.
  • relays may in particular be constituted by hot-spots of the WIFI, WINMAX or DSRC type.
  • the actual travel times are measured between predetermined points of the network, these points being recorded in a table of the device.
  • these predetermined points replace magnetic loops and video cameras of the prior art.
  • a point of the network will be preferentially defined by GPS coordinates.
  • predetermined points can be located or not at the positions of the aforementioned relays.
  • the statistical calculation means work not directly on the actual travel times between two points of the network, but from actual periods of pairs of points, each pair of points defining a segment. , these segments having one end in common.
  • the main advantage lies in a simple, fast method that is very well adapted to the type of data provided by a tracer vehicle system, especially to sparse and noisy data.
  • the traffic reconstruction calculation the reconstruction including the estimation of past and present states as well as the prediction of future states, is done in two steps.
  • the estimated durations between two waypoints can be made available to users in several ways.
  • the estimated journey times are published on variable message signs present on the road networks.
  • this information may be published by the server on a website accessible by a terminal of the user.
  • This information can also be transmitted by the server to terminals embedded in the vehicles via wireless communication means.
  • the various steps of the information method are determined by instructions of computer programs.
  • the invention also relates to a computer program on an information medium, this program being capable of being implemented in a server or more generally in a computer, this program comprising instructions adapted to the implementation of steps of an information method as described above.
  • This program can use any programming language, and be in the form of source code, object code, or intermediate code between source code and object code, such as in a partially compiled form, or in any other form desirable shape.
  • the invention also relates to a computer-readable information medium, comprising instructions of a computer program as mentioned above.
  • the information carrier may be any entity or device capable of storing the program.
  • the medium may comprise storage means, such as a ROM, for example a CD ROM or a microelectronic circuit ROM, or a magnetic recording medium, for example a diskette (floppy disc) or a disk hard.
  • the information medium may be a transmissible medium such as an electrical or optical signal, which may be conveyed via an electrical or optical cable, by radio or by other means.
  • the program according to the invention can be downloaded in particular on an Internet type network.
  • the information carrier may be an integrated circuit in which the program is incorporated, the circuit being adapted to execute or to be used in the execution of the method in question.
  • the figure 1 represents a road network R on which are arranged a number of relays 20 and a digital map CN of this network R on which have been defined a certain number of predetermined points A, B, ....
  • the predetermined point F is positioned on the digital map CN at the location of a relay 20 of the road network R. This is not the case for all the predetermined points.
  • the figure 2 represents an information system according to the invention.
  • this system comprises a server 30 managed by a traffic management center, a number of relays 20, devices 10 embedded in vehicles 5 and a variable message panel 40.
  • the relays 20 are powered by solar panels 27. These relays 20 are adapted to communicate over a WIFI L1 link with the devices 10 embedded in the vehicles 5 and with the server 30 via a UMTS link. L2 and the Internet 200.
  • the figure 3 schematically represents the hardware architecture of a device 10 embedded in a vehicle 5.
  • This device 10 has the hardware architecture of a computer.
  • It comprises in particular a processor 11, a read-only memory ROM 13, a random-access memory RAM 12, a rewritable non-volatile memory Flash type 17 and means 14 wireless communication with the relays 20.
  • This device 10 also comprises locating means constituted in this example by a GPS module 15, a table 16 in which the GPS coordinates of the predetermined points A, B, ... of the digital map CN and a stopwatch 18 are recorded.
  • the processor 11 detects, thanks to the GPS module 15, that the device 10 is located near a point A, B, ... of the table 16, it triggers the stopwatch 18.
  • the processor 11 determines that the device 10 is located near another point B recorded in the table 10, it obtains, thanks to the stopwatch 18, the actual duration of the path between the points A and B of the network. These durations are stored in the rewritable non-volatile memory 17.
  • the device 10 when the device 10 is within range of a relay 20, it transmits the actual path times stored in the rewritable non-volatile memory 17 to the server 30 via this relay.
  • the figure 4 represents the hardware architecture of a relay 20 in a particular embodiment.
  • This relay 20 has the hardware architecture of a computer. It comprises in particular a process 21, a ROM ROM 23, a random access memory RAM 22, WIFI type communication means 24, for communicating with a device 10 embedded in a vehicle 5, UMTS communication means 25 for transmitting information to the server 30, and a solar panel 27.
  • the figure 5 represents the hardware architecture of a server 30 that can be used in an information system according to the invention.
  • This server 30 has the hardware architecture of a computer. It comprises a processor 31, a read ROM ROM 33, a RAM type RAM 32 and communication means 34 with the Internet network 200.
  • ROM ROM 33 constitutes a recording medium according to the invention in which a computer program according to the invention is recorded for executing the information method according to the invention and whose main steps will be described later with reference to the figure 6 .
  • the communication means 34 are adapted to receive the actual travel times from the devices 10 embedded in the vehicles, and statistically calculate, from these actual data, the estimated travel times between two points of the network.
  • users can take note of the estimated duration of the journey either by circulating near the variable message panel or via an access terminal to the website 35.
  • the estimated journey times are also communicated by the communication means 34 of the server 30 to the devices 10 embedded in the vehicles.
  • FIG 6 represents, in flowchart form, the main steps of an information method according to the invention in a particular embodiment.
  • this method is implemented by the server 30.
  • It comprises a step E10 during which the server 30 receives the actual lengths of travel traveled by the vehicles between two points of the network.
  • This method then comprises a step E20 for statistically calculating the estimated travel times between two points of the network from the actual times received in step E10.
  • this statistical calculation step uses the Belief Propagation algorithm mentioned previously.
  • the information method according to the invention finally comprises a step E30 of providing the estimated durations to a certain number of terminals, by publication on the website 35 and by sending to the terminals 10 and to the variable message panels 40.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Traffic Control Systems (AREA)
EP09728407A 2008-03-20 2009-03-19 Systeme et procede d'information sur le trafic dans un reseau routier Not-in-force EP2260481B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL09728407T PL2260481T3 (pl) 2008-03-20 2009-03-19 System i sposób informacji o ruchu drogowym w sieci drogowej

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR0851809A FR2929034B1 (fr) 2008-03-20 2008-03-20 Systeme et procede d'information sur le trafic dans un reseau routier
PCT/FR2009/050463 WO2009122107A1 (fr) 2008-03-20 2009-03-19 Systeme et procede d'information sur le trafic dans un reseau routier

Publications (2)

Publication Number Publication Date
EP2260481A1 EP2260481A1 (fr) 2010-12-15
EP2260481B1 true EP2260481B1 (fr) 2011-11-09

Family

ID=39873894

Family Applications (1)

Application Number Title Priority Date Filing Date
EP09728407A Not-in-force EP2260481B1 (fr) 2008-03-20 2009-03-19 Systeme et procede d'information sur le trafic dans un reseau routier

Country Status (8)

Country Link
US (1) US8558720B2 (pl)
EP (1) EP2260481B1 (pl)
AT (1) ATE533140T1 (pl)
ES (1) ES2376524T3 (pl)
FR (1) FR2929034B1 (pl)
MA (1) MA32162B1 (pl)
PL (1) PL2260481T3 (pl)
WO (1) WO2009122107A1 (pl)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SI23226A (sl) * 2010-03-15 2011-05-31 Margento R&D D.O.O. Sistem brezžičnega posredovanja informacij s prometnih znakov, kažipotov in informacijskih tabel v cestnem prometu
US8866638B2 (en) * 2011-05-23 2014-10-21 GM Global Technology Operations LLC Acquisition of travel- and vehicle-related data
WO2015134311A1 (en) 2014-03-03 2015-09-11 Inrix Inc Traffic obstruction detection
CN115891740B (zh) * 2022-12-30 2023-09-12 交通运输部规划研究院 一种高速公路新能源汽车电量预警系统

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ATE156287T1 (de) * 1992-04-02 1997-08-15 Horizont Holding Gmbh Verfahren und anlage zur verkehrsregulierung
US5933100A (en) * 1995-12-27 1999-08-03 Mitsubishi Electric Information Technology Center America, Inc. Automobile navigation system with dynamic traffic data
ES2353157T3 (es) * 1998-11-23 2011-02-25 Integrated Transport Information Services Limited Sistema instantáneo de supervición del tráfico.
US6466862B1 (en) * 1999-04-19 2002-10-15 Bruce DeKock System for providing traffic information
EP1591980A1 (en) * 2004-03-29 2005-11-02 C.R.F. Società Consortile per Azioni Traffic monitoring system

Also Published As

Publication number Publication date
WO2009122107A1 (fr) 2009-10-08
ATE533140T1 (de) 2011-11-15
EP2260481A1 (fr) 2010-12-15
FR2929034B1 (fr) 2010-04-16
FR2929034A1 (fr) 2009-09-25
US20110115648A1 (en) 2011-05-19
US8558720B2 (en) 2013-10-15
MA32162B1 (fr) 2011-03-01
PL2260481T3 (pl) 2012-06-29
ES2376524T3 (es) 2012-03-14

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