EP0962004A1 - Dispositif et procede servant a donner des informations sur les encombrements de la circulation - Google Patents

Dispositif et procede servant a donner des informations sur les encombrements de la circulation

Info

Publication number
EP0962004A1
EP0962004A1 EP97951850A EP97951850A EP0962004A1 EP 0962004 A1 EP0962004 A1 EP 0962004A1 EP 97951850 A EP97951850 A EP 97951850A EP 97951850 A EP97951850 A EP 97951850A EP 0962004 A1 EP0962004 A1 EP 0962004A1
Authority
EP
European Patent Office
Prior art keywords
traffic
data
route
density
describe
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.)
Granted
Application number
EP97951850A
Other languages
German (de)
English (en)
Other versions
EP0962004B1 (fr
Inventor
Jochen Schaefer
Rudolf Messerschmidt
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.)
Robert Bosch GmbH
Original Assignee
Robert Bosch GmbH
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of EP0962004A1 publication Critical patent/EP0962004A1/fr
Application granted granted Critical
Publication of EP0962004B1 publication Critical patent/EP0962004B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G08—SIGNALLING
    • G08G—TRAFFIC CONTROL SYSTEMS
    • G08G1/00—Traffic control systems for road vehicles
    • G08G1/09—Arrangements for giving variable traffic instructions
    • G08G1/091—Traffic information broadcasting
    • G08G1/093—Data selection, e.g. prioritizing information, managing message queues, selecting the information to be output
    • G—PHYSICS
    • G08—SIGNALLING
    • G08G—TRAFFIC CONTROL SYSTEMS
    • G08G1/00—Traffic control systems for road vehicles
    • G08G1/09—Arrangements for giving variable traffic instructions
    • G08G1/0962—Arrangements for giving variable traffic instructions having an indicator mounted inside the vehicle, e.g. giving voice messages
    • G08G1/0967—Systems involving transmission of highway information, e.g. weather, speed limits
    • 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 invention relates to a device for information about traffic disturbances with means for receiving traffic data recorded with sensors and a method for information about traffic disturbances.
  • Digitally coded traffic reports - hereinafter also referred to as TMC messages - can be transmitted using the radio data system (RDS), which enables additional and inaudible transmission of digital data in parallel with radio programs in a data channel.
  • RDS radio data system
  • Specifications of the radio data system for VHF radio can be found in Tech. 3244 - E, March 1984 of the European Runfunk Union (EBU). Broadcast receivers with suitable RDS decoders can record and decode transmitted data in addition to audio reception with the same receiver.
  • Digitally coded traffic announcements can also be transmitted in other ways than via radio transmitters and radio data signals. For example, it is possible to transmit the digitally coded traffic reports via mobile radio networks. With GSM (Global System for Mobile Communication), short messages can be transmitted parallel to the language, which can also contain digitally coded traffic reports. These known systems are used primarily for the transmission of traffic reports, but reports with other contents are not excluded, for example general danger warnings.
  • the digital coding enables the received data to be processed before being output, for example a selection by area or street.
  • the device according to the invention can be in or in connection with a terminal, for example a car radio or a mobile radio device, or in a central one Device be arranged.
  • a terminal for example a car radio or a mobile radio device, or in a central one Device be arranged.
  • the flux density diagram used for the calculation is often also called
  • This embodiment can also be designed in such a way that the traffic data received further describe the flow-density diagram applicable in each case for the route section.
  • This has the advantage that a central traffic computer can adapt the flow-density diagram to be taken into account in the calculation to the current road conditions (for example, single-lane traffic on a motorway). Since the flux density diagram is a parabola that passes through the coordinate zero point, a description by two variables is sufficient, for example by the coordinates of the maximum.
  • the traffic data received are expanded TMC messages.
  • the existing facilities of the TMC system can be used to a large extent.
  • interference from existing TMC receivers can be excluded.
  • the data to be output describe the average speed and / or the travel time on a known section of the route. Additionally or alternatively, according to another advantageous development, it can be provided that the data to be output describe the change in the length of the traffic disruption.
  • Another development of the device according to the invention is that data for describing the flux-density diagrams of sections of the route are stored in a memory. For those sections of the route for which there are no temporary changes, a transfer of the data describing the flux density diagram is not necessary.
  • the data for the "normal" flowcharts can be stored in a simple manner in connection with the location tables which are required in any case for decoding TMC messages.
  • Programs to calculate route recommendations have become known to further facilitate the planning and implementation of, in particular, longer car journeys. Such programs are available on the market for personal computers, for example, or are integrated in navigation systems.
  • the user enters the start and destination, possibly also other waypoints, and then receives a route recommendation either as a list or as a marker on a road map. Even if the road condition and possibly existing traffic disturbances are taken into account when calculating this route recommendation, one can unfavorable route calculation nevertheless take place, the driver being shown a route which turns out to be incorrect only at a waypoint which has been reached for a long time because of a traffic disturbance which has meanwhile increased considerably.
  • means for calculating route recommendations are therefore also provided, the calculated data to be output being taken into account.
  • the device and the means for calculating route recommendations are arranged in a terminal which receives the traffic data from at least one central device. All that is required is a unidirectional data connection with the central device to the terminal, such as in the radio data system or in the broadcast channel of a mobile radio system.
  • the device and the means for calculating route recommendations are arranged in a central device, to which data on a desired journey can be fed from terminal devices and from which the calculated route recommendations can be transmitted to the terminal devices.
  • This development requires a bidirectional data connection, such as that made available by mobile radio systems.
  • the object of the invention is achieved in a method according to the invention for information about traffic disruptions, traffic data being recorded with the aid of sensors, in that data which are to be output from the recorded traffic data are calculated with the aid of a flow-density diagram which is valid for the respective route section impact describe the traffic disruption.
  • the invention also includes a method for transmitting information about traffic disruptions, traffic data being recorded with the aid of sensors, in which it is provided that the recorded traffic data are transmitted to receivers and there with the aid of a flow-density diagram valid for the respective route section data to be output from the transmitted traffic data are calculated, which describe the effect of the traffic disruption.
  • Fig. 1 is a block diagram of an inventive
  • Fig. 4 is a block diagram of a device according to a development of the invention in a terminal
  • Fig. 5 in a central facility.
  • Identical parts are provided with the same reference symbols in the figures.
  • the exemplary embodiment and parts thereof are shown as block diagrams. However, this does not mean that the device according to the invention is limited to implementation using individual circuits corresponding to the blocks. Rather, the device according to the invention can be implemented in a particularly advantageous manner with the aid of highly integrated circuits. In this case, digital signal processors can be used which, with suitable programming, carry out the processing steps shown in the block diagrams.
  • the device according to the invention, together with further circuit arrangements within an integrated circuit can form essential parts of a terminal, for example a radio receiver.
  • Broadcast signals containing RDS signals are received in a receiver 1, with demodulation, error correction and decoding of the RDS signals and subsequent decoding of the TMC messages also taking place.
  • a device in the receiver 1 for selecting the TMC messages according to selection criteria which can be set by the user, for example according to individual streets and areas.
  • the remaining TMC messages are then fed to a selection filter 2, which is connected to memories 3 to 5, 15 for the location LOC, the extent EXT, the characteristic values kmax, qmax of the flux density diagram, each with the TMC message transmitted current traffic density k and the also transmitted extent 1 of the traffic disruption. This information can be saved for several TMC messages.
  • the route length is temporarily stored in a memory 8, while at 14 a calculation of the FDD characteristic value in the event that the Several FDD parameters are stored in the location list. This can be the case if, for example, a route section has four, sometimes six lanes. This calculation can be made as a minimum (worst value) or as an average.
  • the FDD characteristic value thus calculated is temporarily stored at 9.
  • a selection is made between the FDD characteristic value temporarily stored at 4 and at 9.
  • the transmitted FDD characteristic value which is temporarily stored at 4, has priority, so that the characteristic value read from the location list 6 is only used if no FDD characteristic value has been transmitted. This selection can also be made at 7, which is indicated by a dashed line.
  • the result of the selection at 10 as well as the temporarily stored traffic density k and the extent 1 are evaluated at 11.
  • the evaluation can be carried out with the aid of the flow-density diagram, likewise calculated at 11, as described below with reference to FIGS. 2 and 3.
  • the data to be output are then made visible using an output device (such as a display) 12 and / or can be e.g. be made available via voice output.
  • FIGS. 2 and 3 each show a flow-density diagram which shows the relationship between traffic flow q and traffic density k.
  • the traffic flow in cars per unit of time is measured, while the traffic density means k cars per unit of route.
  • three points A, B, C are highlighted for one low traffic density k1, medium traffic density k2 and high traffic density k3.
  • the slope of the straight line shown in dashed lines in FIG. 2 gives the average speed of the vehicles.
  • kmax and qmax were transmitted as a FDD identifier for a predetermined route section, from which the complete curve is calculated. If, for example, there is a traffic density k2 on the route section, which is also transmitted to the terminal, the traffic flow can be calculated. The gradient of the straight line through point B and thus the average speed is then calculated by dividing the flow of traffic by the traffic density. Since the length 1 of the traffic disruption was also transmitted, the time for driving through the part of the route section affected by the traffic disruption can in turn be calculated therefrom and made available by the output device 12. Other results can also be displayed, for example the delay compared to a journey at approximately "normal" speed or the time for the entire section of the route.
  • points A, B, C are tangents to the flux density diagram.
  • the slope of these tangents gives the speed of density waves and the slope of a secant, as shown for example between points A and B, the speed of shock waves.
  • Density waves continue with a positive slope of the tangents in the direction of travel, with a negative slope against the direction of travel, the latter thus influencing the following traffic. This makes it possible to calculate whether a traffic disruption has reached a junction of a motorway in the direction of travel or against the direction of travel within a predetermined time. Then, for example, a motorist can decide or recommend a terminal which connection point he uses to leave or drive up.
  • FIG. 4 shows a device which is preferably also arranged in a terminal and is supplemented by a device 16 for calculating route recommendations.
  • a device 16 for calculating route recommendations This includes a memory 17 with a so-called digital street map, which can optionally also be combined with the location list 6.
  • the user With the aid of a keyboard 18, the user can enter the start, the destination and any intermediate waypoints that are to be passed on the journey.
  • the selection of the TMC messages carried out in the receiver 1 can be controlled by the device 16 in such a way that all TMC messages which possibly influence the calculation of the route recommendation are selected.
  • the relevant data for all these TMC messages are stored in memories 3 to 5 and 15.
  • the data belonging to a route section in each case can be called up by the device 16 from the memories, whereupon the result of the evaluation can be sent to the device 16 at 11.
  • Traffic disturbances and their effects can thus be taken into account in the route calculation known per se. For example, it can be calculated whether a traffic disruption on a route section which is recommended per se by the route calculation and can be reached later by the vehicle represents a severe impairment, so that a different route may be recommended from the outset.
  • FIG. 5 shows a device according to the invention, which is arranged in a central unit, for example in a central traffic computer, and corresponds in its most important components to the device according to FIG. 4.
  • Messages relating to individual route sections which essentially contain the same information as in the exemplary embodiments already explained, are supplied via a communication network 21, for example ISDN, by a large number of sensors 22, which are only indicated in FIG. 5.
  • the data present for each section of a road network are stored in the memories 3 to 5 and 15, so that the device 16 is able to take into account all reported traffic disruptions when calculating any route recommendations.
  • requirements for calculating a route recommendation and the calculated route recommendations are transmitted to terminals 24 via a mobile radio network 23.
  • the keyboard 18 and the display device 12 can be used for monitoring and maintenance tasks.

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Atmospheric Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Traffic Control Systems (AREA)

Abstract

L'invention concerne un dispositif et un procédé servant à donner des informations sur les encombrements de la circulation, à l'aide de moyens pour recevoir des données de circulation reçues par des capteurs. Selon l'invention, il est prévu des moyens pour calculer des données à émettre décrivant les effets de l'encombrement, à partir des données de circulation reçues, au moyen d'un diagramme flux-densité valable pour un tronçon donné.
EP97951850A 1997-02-28 1997-12-12 Dispositif et procede servant a donner des informations sur les encombrements de la circulation Expired - Lifetime EP0962004B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19708106A DE19708106A1 (de) 1997-02-28 1997-02-28 Einrichtung und Verfahren zur Information über Verkehrsstörungen
DE19708106 1997-02-28
PCT/DE1997/002897 WO1998038617A1 (fr) 1997-02-28 1997-12-12 Dispositif et procede servant a donner des informations sur les encombrements de la circulation

Publications (2)

Publication Number Publication Date
EP0962004A1 true EP0962004A1 (fr) 1999-12-08
EP0962004B1 EP0962004B1 (fr) 2003-05-14

Family

ID=7821802

Family Applications (1)

Application Number Title Priority Date Filing Date
EP97951850A Expired - Lifetime EP0962004B1 (fr) 1997-02-28 1997-12-12 Dispositif et procede servant a donner des informations sur les encombrements de la circulation

Country Status (6)

Country Link
EP (1) EP0962004B1 (fr)
JP (1) JP2001513235A (fr)
KR (1) KR20000071119A (fr)
DE (2) DE19708106A1 (fr)
ES (1) ES2200209T3 (fr)
WO (1) WO1998038617A1 (fr)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
HUP0100832A3 (en) * 1998-02-05 2002-03-28 Pfizer Prod Inc Quinoxaline and quinoline carboxamide derivatives, their use and the pharmaceutical compositions containing them
DE19914041A1 (de) * 1999-03-27 2000-09-28 Bosch Gmbh Robert Verfahren zur Information von Autofahrern
GB9914812D0 (en) * 1999-06-25 1999-08-25 Kew Michael J Traffic monitoring
WO2001006477A1 (fr) * 1999-07-20 2001-01-25 Siemens Aktiengesellschaft Procede et dispositif permettant de traiter des rapports d'etats d'un systeme
DE19951546C2 (de) * 1999-10-26 2002-03-21 Siemens Ag Verfahren zum Benachrichtigen eines Benutzers über eine Verkehrsinformation und Navigationsgerät
DE10014259C2 (de) * 2000-03-22 2003-02-06 Harman Becker Automotive Sys Verfahren zur Berechnung der Fahrtzeit und Navigationssystem
DE102005010246A1 (de) * 2005-03-05 2006-09-07 Deutsche Telekom Ag Verfahren und Vorrichtung zur Übertragung von Normalformen von Verkehrsstörungen zum Zwecke zeitabhängiger Navigation
DE102005032975A1 (de) * 2005-07-14 2007-01-25 Siemens Ag Verfahren und Verkehrsrechner zur Berechnung eines aktuellen oder künftigen Verkehrszustandes
US7948400B2 (en) 2007-06-29 2011-05-24 Microsoft Corporation Predictive models of road reliability for traffic sensor configuration and routing
DE102009029531A1 (de) 2009-09-17 2011-03-24 Robert Bosch Gmbh Einschätzung der Straßenverkehrsdichte bei Kraftfahrzeugen

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3128578A1 (de) * 1981-07-20 1983-02-03 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt "verfahren zur automatischen staudetektion und stauprognose fuer den strassenverkehr"
WO1989002142A1 (fr) * 1987-08-25 1989-03-09 Elin-Union Aktiengesellschaft Für Elektrische Indu Systeme permettant une utilisation amelioree de voies de transport existantes
DE4328939C2 (de) * 1993-08-28 2000-06-21 Ave Verkehrs Und Informationst Verfahren zur Erfassung von streckenbezogenen Verkehrsgrößen
DE29505615U1 (de) * 1995-03-31 1995-11-02 Copilot Verkehrsleit Und Verke Verkehrsleitsystem für ein Verkehrswegenetz
EP0740280B1 (fr) * 1995-04-28 1999-07-28 INFORM Institut für Operations Research und Management GmbH Méthode de détection des pertubations pour trafic routièr

Non-Patent Citations (1)

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Title
See references of WO9838617A1 *

Also Published As

Publication number Publication date
DE19708106A1 (de) 1998-09-03
EP0962004B1 (fr) 2003-05-14
ES2200209T3 (es) 2004-03-01
DE59710100D1 (de) 2003-06-18
JP2001513235A (ja) 2001-08-28
WO1998038617A1 (fr) 1998-09-03
KR20000071119A (ko) 2000-11-25

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