EP0755039B1 - Procédé et système pour le pronostic de l'écoulement du trafic - Google Patents

Procédé et système pour le pronostic de l'écoulement du trafic Download PDF

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Publication number
EP0755039B1
EP0755039B1 EP96250138A EP96250138A EP0755039B1 EP 0755039 B1 EP0755039 B1 EP 0755039B1 EP 96250138 A EP96250138 A EP 96250138A EP 96250138 A EP96250138 A EP 96250138A EP 0755039 B1 EP0755039 B1 EP 0755039B1
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EP
European Patent Office
Prior art keywords
traffic
data
vehicles
computer
route
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.)
Expired - Lifetime
Application number
EP96250138A
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German (de)
English (en)
Other versions
EP0755039A3 (fr
EP0755039A2 (fr
Inventor
Uwe Dr. Rer. Nat. Albrecht
Josef Dipl.-Ing. Heimann
Werner Dr. Rer. Nat. Schulz
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.)
Vodafone Holding GmbH
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Vodafone 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 Vodafone GmbH filed Critical Vodafone GmbH
Publication of EP0755039A2 publication Critical patent/EP0755039A2/fr
Publication of EP0755039A3 publication Critical patent/EP0755039A3/xx
Application granted granted Critical
Publication of EP0755039B1 publication Critical patent/EP0755039B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • G08G1/09—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
    • G08G1/096708—Systems involving transmission of highway information, e.g. weather, speed limits where the received information might be used to generate an automatic action on the vehicle control
    • G08G1/096716—Systems involving transmission of highway information, e.g. weather, speed limits where the received information might be used to generate an automatic action on the vehicle control where the received information does not generate an automatic action on the vehicle control
    • 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
    • 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
    • G08G1/096733—Systems involving transmission of highway information, e.g. weather, speed limits where a selection of the information might take place
    • G08G1/096741—Systems involving transmission of highway information, e.g. weather, speed limits where a selection of the information might take place where the source of the transmitted information selects which information to transmit to each vehicle
    • 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
    • G08G1/096766—Systems involving transmission of highway information, e.g. weather, speed limits where the system is characterised by the origin of the information transmission
    • G08G1/096775—Systems involving transmission of highway information, e.g. weather, speed limits where the system is characterised by the origin of the information transmission where the origin of the information is a central station

Definitions

  • the invention relates to a method and system for predicting traffic flows selected locations or sections of a road network, in particular for Traffic control and route guidance of vehicles, with the determined traffic flow data, which contain at least traffic density information from a traffic computer that has a digital road map for forecasting the expected traffic flows can be used.
  • WO 89/02142 describes a system for optimal use of a road network known that at selected locations or route sections over at least one Recording sensor has the traffic condition, in particular the traffic density, detected.
  • the traffic status data is then sent to a control center, which is a Traffic calculator can be transmitted.
  • the processing and processing takes place in the control center
  • Preparation of the traffic condition data, which is then used for direct Traffic control can be used, for example, by direct information from the Car driver; the traffic control is based on a target-actual comparison the traffic condition data from selected locations or sections of route.
  • the Target values correspond, for example, to the optimal traffic condition on the corresponding section of the road network.
  • To better capture the Traffic flows become the traffic status data determined at different locations two measuring points e.g. subjected to a correlation analysis to get from it Statements etc. to get about the traffic flows.
  • the invention provides that vehicles of a sample vehicle fleet each have their Determine and save current location position depending on time and / or route, so that the determined location positions as route data of the route traveled are available for an evaluation. At least part of the vehicles of the For this purpose, the sample vehicle fleet transmits the route data to you at intervals Traffic computer.
  • the traffic computer determines from the currently recorded Route data, traffic flows and their composition, i.e. the Partial flows, which essentially make up the traffic flows, and assigns them to the selected locations or route sections. simultaneously serve the determined traffic flows and their composition for the determination and / or updating statistical traffic flow data from the traffic computer as time-dependent empirical values for the forecast of traffic flows be used.
  • Driving activity data in a predetermined larger spatial area around the selected locations or sections of the route are recorded and sent to the traffic computer transmitted so that the traffic computer based on the driving activity data
  • current driving activity data data can also be used, which is not in any case already represent actual driving activity, but only on an immediate one indicate upcoming driving activity (e.g. readiness display of a Mobile phones in a vehicle that is just starting).
  • the traffic computer not only has a large number of vehicles Traffic flow data at certain times, but also about information about which traffic flows make up this traffic flow data.
  • the Route data transmitted by the vehicles of the sample vehicle fleet contain information on the one hand, for example about the relative traffic density individual locations or sections of the route, but also information about which traffic flows cause this traffic density proportionately. That's the way it is possible, for example from the number of active motor vehicles in one predetermined larger spatial area around the selected locations or Route sections around that can be expected in the short or long term Traffic flows safely at the selected locations or sections of route predict.
  • the route data are transmitted in a reduced form by redundant data are removed, for example when driving along a straight road or highway are included in the route data.
  • the Transmission is conveniently via a radio telephone.
  • Statistical traffic flow data is determined and / or updated Parameter-dependent if the traffic flows are forecast with greater certainty Need to become. For example, the traffic flow data becomes dependent determined and / or updated from the day of the week and the time of day.
  • the current driving activity data expediently comprise the operating state of vehicles equipped with a driving activity sensor.
  • the driving activity data is proposed by the invention Query and evaluate the activity of mobile phone networks.
  • the ready display can be used when starting the vehicle. In this case there is no need to install special driving activity sensors.
  • the size of the spatial area in which the imminent or Driving activities that are already running are expediently recorded in Depending on the population density.
  • a system for performing the method has vehicles Sample vehicle fleet, each with means for determining the current Location position, for storing at least the route data and for transmission of data to a receiving unit fixedly arranged outside the vehicles exhibit.
  • the driving activities are arranged by spatially distributed Driving activity sensors detected, which in turn have means for transmitting the recorded driving activity data to the fixedly arranged receiving unit.
  • the system includes a traffic computer, a digital road map, a has electronic memory for storing empirical values and with the Receiving unit for receiving the vehicles from the sample vehicle fleet and data is transmitted to the driving activity sensors.
  • the current position is expediently determined by a Receiver for signals from navigation satellite systems (e.g. GPS), since this is small in structure and the location is technically relative with sufficient accuracy can be easily determined.
  • navigation satellite systems e.g. GPS
  • the traffic computer Sending unit for sending requests to the driving activity sensors, so that the driving activity sensors via a receiving unit also provided can be controlled from the traffic computer. That way the traffic computer the possibility to collect the driving activity data if necessary.
  • the vehicles of the sample vehicle fleet also a receiving unit for receiving requests from the Show traffic calculator.
  • the driving activity sensors are installed in as many vehicles as possible and that the driving activity data in anonymous form, for example at the start of the vehicle are transmitted to the traffic computer.
  • the driving activity sensors are also installed in vehicles that are not for example Sample vehicle fleet belong. But it is also conceivable that the Driving activity sensors e.g. stuck in the pavement of back streets within of a residential area are installed to record the number of active vehicles that with a certain probability staggered to the corresponding Traffic flows contribute to the selected locations or sections of the route.
  • the vehicles also expediently have a sensor for detecting the current vehicle speed, the traffic flows can then be more accurate determined and linked directly to the vehicle density.
  • the system for carrying out the procedure for forecasting traffic flows essentially comprises three subsystems: a sample vehicle fleet 10, spatially distributed driving activity sensors 20, in particular in the vehicles 11 of the sample vehicle fleet 10 can be installed, and a traffic computer 30.
  • the spatially distributed driving activity sensors 20 can be act movable as well as stationary driving activity sensors 20. Is essential doing that driving activity sensors 20 spatially over a certain geographic Area are arranged in order to make the driving activities as "area-wide" as possible to capture.
  • the subsystems can be interconnected in terms of data technology.
  • the data connection to the traffic computer 30 are the vehicles 11 the sample vehicle fleet 10 each equipped with a transmitter Driving activity sensors 20 together with a transmitter form a device-related one Unit that automatically transmit driving activity data to the traffic computer 30 can.
  • Traffic activity data is the traffic computer 30 with a corresponding one Receiving unit 31 provided.
  • the receiving units of the Vehicles 11 of the sample vehicle fleet 10 and / or the driving activity sensors 20 be equipped with a receiving device. These receiving devices then enable the reception of requests from the traffic computer which the corresponding route and driving activity data with the corresponding Information needs, for example in difficult traffic situations on the corresponding sections of the route.
  • the means installed in the vehicles of the sample vehicle fleet 10 include a device for determining the current location and expediently also the current vehicle speed, a memory for storage at least the route data and the above-mentioned Sending device for Transmission of data to the fixed outside of the vehicles 11 Traffic calculator 30.
  • a device for determining the current location and expediently also the current vehicle speed a memory for storage at least the route data and the above-mentioned Sending device for Transmission of data to the fixed outside of the vehicles 11 Traffic calculator 30.
  • To determine the current location and the current one Vehicle speed can be, for example, a receiver for signals from Navigation satellite systems in the vehicles of the sample vehicle fleet 10 be provided.
  • the route is one in each of the vehicles 11 of the sample vehicle fleet 10 Storage unit provided, which is expedient in the sense of a ring storage system is organized and only the information over a limited period of time detected.
  • the storage of the receiver for signals from Navigation satellite systems determined location positions and data transmission to the traffic computer 30 from a microprocessor integrated in the vehicle controlled.
  • the transmitter unit installed in the vehicles 11 enables this Transmission of the route data to the traffic computer 30, the triggering the data transfer is carried out by the microprocessor.
  • Traffic computer 30 The one arranged outside the vehicles 11 of the sample vehicle fleet 10 Traffic computer 30 is connected directly to a receiving unit 31. About these The routes of the vehicles 11 of the sample vehicle fleet are connected 10 passed to the traffic computer 30. To store the routes is the Traffic computer 30 equipped with appropriate storage units. One in Traffic computer 30 provided digital road map enables the assignment of Driving routes to the corresponding road sections. Those from the routes derived empirical values regarding the traffic flows and their Composition at selected locations or sections of a route Road networks are in a special storage unit of the traffic computer 30 stored.
  • Driving activity sensors 20 can also be sensors that are not or not only record current driving activities of a vehicle, but such events capture that are related to upcoming driving activities. The upcoming driving activities can be done with a certain statistical Security related to the events captured.
  • Driving activity sensors 20 are cellular telephones whose activity is within of a cellular telephone network is recorded and evaluated in order to make a statement about receive upcoming or current driving activities.
  • they are "Driving activity sensors" not with a special transmission device for transmission equipped the activity data to the traffic computer 30, but that Cellular telephone network takes over the data transmission with its transmission units the traffic computer 30.
  • Starting point of the process for forecasting traffic flows at selected Locations or sections of a road network are independent determining vehicles 11 of a sample vehicle fleet 10 which are within a Move road network.
  • the movement of these vehicles 11 within the Road network takes place e.g. randomly and without special requirements.
  • a receiver for signals from navigation satellite systems are in Vehicle constantly the current position and the current vehicle speed determined and successively together in a storage unit stored.
  • These stored location positions represent the most important part of the Itinerary data, in particular the time of the respective Location determination can include. But it is also possible that the entire Route and thus the entire route data only one point in time or one Time period is assigned. There is a time assignment to the route data, if a time-dependent evaluation is planned.
  • the route data will be from the vehicles 11 of the sample vehicle fleet 10 by means of the transmission unit transmit the fixed reception unit 31 of the traffic computer 30.
  • the route data is transmitted time and / or route dependent, it can regularly or irregularly or on request.
  • the Receiving unit 31 transfers the route data to the traffic computer 30, the initially stores them in a memory or memory area provided for this purpose.
  • the route data are in each case the individual sections of the road network on the digital road map assigned.
  • the traffic computer 30 determines the essential partial flows (Partial traffic flows) and the resulting traffic densities at least relative to a selected location or section of a road network to each other, i.e. it is the percentage of a partial flow in the total Traffic flow at a selected location or section of a route Road network determined.
  • These traffic flow conditions are determined using the empirical values available in the memory, i.e. with the experience at taking into account the same time of a corresponding weekday special boundary conditions, compared and modified.
  • a special one Boundary condition would be, for example, the start of school holidays on that day in a particular state and the like.
  • the modification can e.g.
  • the Evaluation is carried out by starting from the determined driving activity data, i.e. the driving activities, resulting from this with a certain statistical probability resulting partial flows (partial traffic flows) are derived. Again, this can based on empirical values stored in the memory.
  • the forecast of traffic flows at selected locations or sections of route of a road network is then carried out using the from the driving activity data derived partial flows (partial traffic flows) based on the determined traffic flow conditions, essentially by extrapolating the locations or Traffic flow data assigned to route sections (traffic flow conditions) taking into account empirical values that are particularly time-dependent can. Based on the forecast traffic flows, suitable ones can then be found Measures to influence traffic or route guidance of vehicles take place.
  • the method according to the invention mainly provides the traffic flow conditions at selected locations or sections of a road network; investigating the absolute traffic densities, as a rule, must pass through if required additional procedures are carried out.
  • This determination of the absolute traffic density can but based on empirical values. It is also possible to some Distribute traffic density sensors in the road network and thus the traffic flow conditions to calibrate, i.e. selected locations or sections of route absolute Traffic densities based on the specific traffic flow conditions assigned.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Atmospheric Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Traffic Control Systems (AREA)
  • Navigation (AREA)
  • Mobile Radio Communication Systems (AREA)

Claims (13)

  1. Procédé pour le pronostic de flux de trafic en des lieux ou des tronçons de trajet sélectionnés d'un réseau routier, en particulier pour commander le trafic et guider des véhicules, dans lequel des données de flux de trafic déterminées, qui contiennent des informations au moins sur la densité du trafic, sont utilisées par un calculateur de trafic, qui présente une carte routière numérique, pour le pronostic des flux de trafic à attendre,
    les véhicules d'une flotte de véhicules échantillons déterminant continuellement la position locale actuelle et la mémorisant comme données d'itinéraire de l'itinéraire parcouru, et
    au moins une partie des véhicules transmettant, à intervalles, leurs données d'itinéraire au calculateur de trafic,
    le calculateur de trafic déterminant, à partir des données d'itinéraire, les données de flux de trafic, associant ces données de flux de trafic aux lieux ou tronçons de trajet sélectionnés et les utilisant comme valeurs d'expérience dépendant du temps pour déterminer et/ou actualiser des données de flux de trafic statistiques,
    dans une grande zone spatiale prédéfinie autour des lieux ou tronçons de trajet sélectionnés, des données d'activité de circulation actuelles étant détectées par des capteurs d'activité de circulation fixes ou mobiles et étant transmises au calculateur de trafic, et
    le calculateur de trafic, à partir des données d'activité de circulation détectées dans la grande zone spatiale prédéfinie autour des lieux ou tronçons de trajet sélectionnés, pronostiquant les flux de trafic aux lieux ou tronçons de trajet sélectionnés par extrapolation des données de flux de trafic associées en tenant compte des valeurs d'expérience dépendant du temps.
  2. Procédé selon la revendication 1,
    caractérisé en ce que les données d'itinéraire de l'itinéraire parcouru sont transmises sous forme réduite avant le transfert au calculateur de trafic.
  3. Procédé selon la revendication 1 ou 2,
    caractérisé en ce que le calculateur de trafic effectue la détermination et/ou l'actualisation de données de flux de trafic statistiques de façon dépendant de paramètres prédéfinis.
  4. Procédé selon une des revendications 1 à 3,
    caractérisé en ce que les données d'itinéraire de l'itinéraire parcouru et les données d'activité de circulation sont transmises après appel par le calculateur de trafic à celui-ci.
  5. Procédé selon une des revendications 1 à 4,
    caractérisé en ce que les données d'activité de circulation actuelles affichent l'état de fonctionnement d'un véhicule.
  6. Procédé selon une des revendications 1 à 5,
    caractérisé en ce que les données d'activité de circulation sont déterminées par appel et exploitation de l'activité de réseaux téléphoniques de radiotéléphonie mobile.
  7. Procédé selon une des revendications 1 à 6,
    caractérisé en ce que la zone spatiale dans laquelle les activités de circulation sont détectées, est prédéfinie en fonction de la densité de peuplement.
  8. Système pour la mise en oeuvre du procédé selon la revendication 1, comportant des véhicules (11) d'une flotte de véhicules échantillons (10), qui présentent des moyens pour déterminer la position locale actuelle, pour mémoriser au moins les positions locales, comme données d'itinéraire, et pour transférer les données d'itinéraire à une unité de réception (31) agencée indépendamment des véhicules (11), de plus des capteurs d'activité de circulation (20) agencés de façon spatialement répartie, qui présentent des moyens pour le transfert des données d'activité de circulation détectées à l'unité de réception (31), et un calculateur de trafic (30), qui présente une carte routière numérique ainsi qu'une mémoire électronique pour stocker des données et est relié à l'unité de réception (31) pour recevoir les données transmises par les véhicules (11) de la flotte de véhicules échantillons (10) et les capteurs d'activité de circulation (20).
  9. Système selon la revendication 8,
    caractérisé en ce que les véhicules (11) pour déterminer la position locale actuelle présentent un récepteur pour des signaux de systèmes de navigation par satellites.
  10. Système selon la revendication 8 ou 9,
    caractérisé en ce que le calculateur de trafic (30) présente une unité d'émission pour l'émission et les capteurs d'activité de circulation (20) un dispositif de réception pour recevoir des demandes du calculateur de trafic pour la transmission de données.
  11. Système selon une des revendications 8 à 10,
    caractérisé en ce que les véhicules (11) de la flotte de véhicules échantillons (10) présentent un dispositif de réception pour recevoir des demandes du calculateur de trafic pour la transmission de données.
  12. Système selon une des revendications 8 à 11,
    caractérisé en ce que, comme capteurs d'activité de circulation (20), on utilise les affichages d'attente de fonctionnement de radiotéléphones mobiles dans une pluralité de véhicules.
  13. Système selon la revendication 8,
    caractérisé en ce que les véhicules (11) présentent un capteur pour détecter la vitesse instantanée du véhicule.
EP96250138A 1995-07-07 1996-06-26 Procédé et système pour le pronostic de l'écoulement du trafic Expired - Lifetime EP0755039B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19526148A DE19526148C2 (de) 1995-07-07 1995-07-07 Verfahren und System zur Prognose von Verkehrsströmen
DE19526148 1995-07-07

Publications (3)

Publication Number Publication Date
EP0755039A2 EP0755039A2 (fr) 1997-01-22
EP0755039A3 EP0755039A3 (fr) 1997-01-29
EP0755039B1 true EP0755039B1 (fr) 2002-12-04

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EP96250138A Expired - Lifetime EP0755039B1 (fr) 1995-07-07 1996-06-26 Procédé et système pour le pronostic de l'écoulement du trafic

Country Status (4)

Country Link
US (1) US5812069A (fr)
EP (1) EP0755039B1 (fr)
AT (1) ATE229211T1 (fr)
DE (2) DE19526148C2 (fr)

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ATE229211T1 (de) 2002-12-15
DE19526148A1 (de) 1997-02-06
EP0755039A2 (fr) 1997-01-22
DE59609937D1 (de) 2003-01-16
DE19526148C2 (de) 1997-06-05
US5812069A (en) 1998-09-22

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