EP3005334B1 - System for determining traffic information - Google Patents

System for determining traffic information Download PDF

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Publication number
EP3005334B1
EP3005334B1 EP14759117.6A EP14759117A EP3005334B1 EP 3005334 B1 EP3005334 B1 EP 3005334B1 EP 14759117 A EP14759117 A EP 14759117A EP 3005334 B1 EP3005334 B1 EP 3005334B1
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EP
European Patent Office
Prior art keywords
vehicle
terminal
capture line
assigned
travel direction
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EP14759117.6A
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German (de)
French (fr)
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EP3005334A2 (en
Inventor
Peter Aicher
Wilke REINTS
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Yunex GmbH
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Yunex GmbH
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    • 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
    • G08G1/0125—Traffic data processing
    • G—PHYSICS
    • G08—SIGNALLING
    • G08G—TRAFFIC CONTROL SYSTEMS
    • G08G1/00—Traffic control systems for road vehicles
    • G08G1/07—Controlling traffic signals
    • G08G1/087—Override of traffic control, e.g. by signal transmitted by an emergency vehicle
    • G—PHYSICS
    • G07—CHECKING-DEVICES
    • G07B—TICKET-ISSUING APPARATUS; FARE-REGISTERING APPARATUS; FRANKING APPARATUS
    • G07B15/00—Arrangements or apparatus for collecting fares, tolls or entrance fees at one or more control points
    • G07B15/06—Arrangements for road pricing or congestion charging of vehicles or vehicle users, e.g. automatic toll systems
    • 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
    • G08G1/0137—Measuring and analyzing of parameters relative to traffic conditions for specific applications
    • G08G1/0141—Measuring and analyzing of parameters relative to traffic conditions for specific applications for traffic information dissemination
    • G—PHYSICS
    • G08—SIGNALLING
    • G08G—TRAFFIC CONTROL SYSTEMS
    • G08G1/00—Traffic control systems for road vehicles
    • G08G1/123—Traffic control systems for road vehicles indicating the position of vehicles, e.g. scheduled vehicles; Managing passenger vehicles circulating according to a fixed timetable, e.g. buses, trains, trams
    • G08G1/127—Traffic control systems for road vehicles indicating the position of vehicles, e.g. scheduled vehicles; Managing passenger vehicles circulating according to a fixed timetable, e.g. buses, trains, trams to a central station ; Indicators in a central station
    • G—PHYSICS
    • G08—SIGNALLING
    • G08G—TRAFFIC CONTROL SYSTEMS
    • G08G1/00—Traffic control systems for road vehicles
    • G08G1/20—Monitoring the location of vehicles belonging to a group, e.g. fleet of vehicles, countable or determined number of vehicles

Definitions

  • the invention relates to a system for determining traffic information according to the preamble of patent claim 1.
  • a large amount of traffic information is based on determining the position of vehicles within a road network. Of particular interest is the point in time at which a specific vehicle passes through predetermined positions in the road network.
  • mobile or permanently installed terminals that have a position determination device are carried in vehicles of interest.
  • a receiving module for satellite signals from a global satellite-based navigation system such as the American NAVSTAR GPS, the Russian GLONASS or the European GALILEO system, is widespread here.
  • the position of the terminal device and thus the vehicle position of a vehicle carrying the terminal device can be determined cyclically, for example every second, on the basis of the satellite signals. If an electronic map is available in the terminal, the determined vehicle position can be related to the map.
  • Carrying along and updating electronic maps is time-consuming and the continuous reference of a vehicle position to a map is also not necessary for many interesting applications. Rather, it is sufficient if the location coordinates of the actually interesting positions in a road network are stored as reference positions in a memory device of the terminal.
  • a processing device interacting with the position determination device and the memory device can then compare a currently determined vehicle position with stored reference positions. It can thus determine whether the vehicle has passed one of the reference positions.
  • a vehicle management system for motor vehicles is known, the license plate number of which is used for identification.
  • a GPS module is provided inside the vehicle to receive global positioning signals and use them to calculate the coordinates of the current position of the vehicle.
  • a GPRS module is also installed in the vehicle to communicate wirelessly with a remote control center and a storage device for data storage.
  • the processor When the vehicle confirms entering the gateway, the processor reads from the memory device the gateway ID number that corresponds to the entry checkpoint and controls the GPRS module to send a short message containing the gateway ID number and contains the license plate number of the vehicle for registration at the remote control center. Upon receipt of the short message, the control center immediately sends back a registration short message to activate the vehicle's audio or video accessory and notify the driver that the vehicle has entered the highway entrance. The same procedure is carried out when leaving the motorway through an exit.
  • a capture circle is placed around the reference position as a tolerance range, with the reference position being considered to have been passed by a vehicle when it has passed the capture circle.
  • a device for detecting transit traffic with a terminal installed in the vehicle has a position determination system and a computer unit with memory.
  • the computer unit is designed in such a way that it recognizes driving in and out of a specified area based on the position of the vehicle.
  • the coordinates of the entry and exit points are stored in the memory, preferably as geo-coordinates.
  • the currently determined position is compared with the positions of the entry and exit points stored in the memory. If the measured position corresponds to an entry point or if the position is in a capture circle around the entry point, a timer is started that records the time until an exit point is reached.
  • the disclosure document DE 102 05 453 A1 discloses a positioning method for a traffic fee collection system.
  • the position of the vehicle is determined by means of a detection unit provided in the vehicle and compared with defined reference points on a route.
  • the reference points have tolerance ranges with different dimensions, so that the reference points can be better adapted to local conditions. In the case of adjacent reference points in the area of branches or the like, a deviation can be determined with a larger tolerance range and a decision can be made with a smaller tolerance range.
  • the driving history including curve shapes, is used as a support for more precise differentiation. If the vehicle is on a route that is subject to traffic charges, for example on a freeway, transfers of traffic charges are made in a calculation and accounting unit depending on the route traveled.
  • Vectors each of which is determined between one of the positions and the point of intersection, are continuously projected onto the reference direction in order to obtain a sequence of projections.
  • a border crossing is detected when a change of direction or sign occurs in the sequence of projections.
  • the diameter of capture circles must be at least 15 m up to 20 m or more. This accuracy is usually sufficient for applications in the regional road network. In inner-city areas with its dense road network, this can sometimes lead to overlapping of the capture circles, especially in the area of intersections. However, if the diameter of the capture circle is restricted, there is a risk that a vehicle will drive around the capture circle and the reference position will not be considered to have passed.
  • the invention is therefore based on the object of providing a generic system which enables simple and reliable position determination even in an inner-city road network.
  • a traffic signal control system for emergency vehicles comprising: a disaster prevention device for generating and outputting an emergency situation message including controller identification information for each of traffic signal controllers for the emergency vehicle installed on the road through which the emergency vehicle travels, and vehicle movement information when an emergency situation occurrence signal is input, and a traffic signal controller for the emergency vehicle for controlling an emergency signal light including a warning light and a direction signal light, according to the emergency situation message input from the anti-disaster center.
  • the traffic signal controller has, for the entrance vehicle, an approach processing unit for comparing GPS reference information of the emergency vehicle inputted through the third communication unit and GPS reference information for control and calculation, outputting a movement level and a movement direction of the emergency vehicle when the identification signal for the emergency vehicle is inputted from the emergency processing unit, and wherein the processing unit generates emergency signal light control information and outputs the control information to the emergency signal light driver based on movement level and movement direction of the emergency vehicle.
  • a device for giving priority to a vehicle at an intersection controlled by a traffic light system with a device for receiving data for determining a position of the vehicle, a device for detecting whether the determined position of the vehicle is within a detection range, and a transmitter for Sending a signal to the traffic signal system when it is detected that the vehicle's position is within the detection area.
  • a system for optimizing rescue routes for emergency vehicles is known, with a receiving device for the continuous reception of position data from an emergency vehicle, with a determination device for determining waypoints which, based on the last received position data of the emergency vehicle, can be reached by the emergency vehicle in the next few times, and a control device for setting signal systems at the determined waypoints in order to optimize a rescue route of the emergency vehicle.
  • a system for determining traffic information includes a terminal carried in a vehicle.
  • the terminal has a position determination device for determining a vehicle position of the vehicle in a road network, a storage device for storing reference positions defined by location coordinates, and a processing device that interacts with the position determination device and the storage device.
  • the processing device is set up to compare a specific vehicle position with stored reference positions in order to determine whether the vehicle has passed one of the reference positions.
  • a reference position is defined by a snap line running through its spatial coordinates.
  • the processing device is designed to determine whether the vehicle has traversed a capture line and to evaluate a determined capture line traversal as a vehicle passage of the reference position defined by the capture line.
  • a clear separation and recognition of closely adjacent reference points such as those found in an inner-city road network, particularly at intersections, is made possible.
  • the position can also be determined in such road networks with greater detection reliability of vehicle passages at reference positions.
  • the system according to the invention comprises a traffic control center assigned to the road network.
  • the traffic control center is designed as a control center for special vehicles to prioritize them at traffic signal-controlled junctions in the road network, access roads to junctions being assigned reference positions.
  • the terminal comprises a reporting device which interacts with the processing device and which is designed to output a message containing the location coordinates, a passage time and an identification date of the terminal after determining that the vehicle has passed a reference position. Messages are only issued, but automatically, when a vehicle has passed a reference position. A continuous transmission of vehicle positions is avoided here.
  • the messages can be transferred to an application program running on the terminal for further processing. Alternatively, the messages can be transmitted wirelessly to another vehicle device for further processing.
  • the terminal has a communication device for the wireless transmission of messages that have been issued to the traffic control center. The traffic control center is trained to further process the reports.
  • the catch line is defined by a reference travel direction for vehicles assigned to the reference position of the roadway and runs transversely thereto.
  • the position determination device is designed to determine the direction of travel of the vehicle.
  • the processing device is designed to compare a travel direction of the vehicle determined when a capture line traversal is detected with stored reference travel directions. Particularly in the case of very close reference positions, the comparison of the direction of travel measured by the position determination device, which results from the direction of the polygon connecting past vehicle positions, with the stored reference direction of travel serves as an additional decision criterion for determining a trap line traversal.
  • a passage of the reference position can be ruled out despite the detection of a vehicle traversing the catch line if the vehicle drove over the catch line in a travel direction that deviated greatly from the reference travel direction.
  • the catch line preferably runs perpendicular to the reference travel direction.
  • the catch line is defined by a catch line length assigned to the reference position of the roadway.
  • the length of the snap line can be adjusted to the width of the lane, lane or road at each reference position separately become. If the reference position is in the middle of the road structure, its location coordinates can be used as the support point for the snap line, on both sides of which are attached snap line sections of equal length. It is then sufficient to save the snap line length as a defining feature of the reference position.
  • reference positions stored in the memory device are assigned message attributes, comprising type and/or addressee and/or content and/or cycle of a message to be output.
  • reference positions can be added or deleted from the traffic control center by means of the communication device in the storage device of the terminal, or their defining characteristics and reporting attributes can be changed.
  • reference positions can be changed dynamically, for example assigned a temporary validity.
  • a system for determining traffic information comprises a terminal 1 carried in a vehicle V and a terminal 1 assigned to the road network used by the vehicle V Traffic control center 2.
  • the terminal 1 has a device for determining a vehicle position P of the vehicle V in the road network, for example on the roadway S shown.
  • the connection vector of two successively determined vehicle positions P results in a travel direction D of the vehicle V.
  • the terminal 1 has a memory device in which reference positions R of points in the road network that are relevant for traffic information are stored.
  • the reference position R is defined by a straight catch line L, which runs through the spatial coordinates of the reference position R and transverse to the roadway S. It has a catch line length LL, which protrudes beyond the lane S on both sides.
  • the catch line L is defined by a reference travel direction LD assigned to the reference position R, which represents a movement direction predetermined by the traffic routing at the reference position R and is perpendicular to the catch line L, for example.
  • a processing device is used to determine whether the vehicle V is traversing the catch line L and at what traversing angle ⁇ the catch line L was crossed. For this purpose, the determined vehicle positions P are compared with the position and length of the capture line L. In addition, the direction of travel D is compared with the reference travel direction LD at the catch line traverse. If it is determined, while maintaining predeterminable comparison accuracies, that the capture line L has been crossed in the reference travel direction LD, the processing unit determines that the vehicle V has passed the reference position R.
  • a reporting device of the terminal 1 outputs a message M about the location coordinates and time of the passage of the vehicle. If necessary, the message M also contains identification data for the terminal device 1, so that a series of messages M can be assigned to the terminal device 1 that issued it. Using a communication device of the terminal device 1 the output message M is transmitted wirelessly to the traffic control center 2 for further processing.
  • Certain reporting attributes can be assigned to the reference positions R in the memory device, such as the type and/or the addressee and/or the content and/or the cycle of a message M to be output Terminal 1 reference positions R can be added or deleted or their defining characteristics and reporting attributes can be changed.
  • the advantage of the system according to the invention is that a mobile terminal 1 can determine the position at predefined reference points R without using a digital road map by means of a definition of a reference object that is very easy to generate.
  • the design as a catch line L combined with the associated reference travel direction LD and catch line length LL enables a more precise and reliable detection of reaching or passing a defined reference position P compared to previous methods.
  • the actual spatial coordinates of the reference position R do not have to be reached exactly.
  • the reference travel direction LD on a capture line L is unambiguous.
  • the catch line length LL can be adapted to local conditions.
  • the problem of the overlapping of neighboring reference objects is significantly reduced with snap lines compared to snap circles.
  • the position determination method also optimizes the temporal behavior in terminal 1 when recognizing a reference position R.
  • the use of additional reporting attributes for reference positions R describes a universally applicable method that can be used both in a traffic control center 2 and in the same or another mobile terminal is suitable.

Description

Die Erfindung bezieht sich auf ein System zur Ermittlung von Verkehrsinformationen nach dem Oberbegriff des Patentanspruches 1.The invention relates to a system for determining traffic information according to the preamble of patent claim 1.

Grundlage einer Vielzahl an Verkehrsinformationen ist eine Positionsbestimmung von Fahrzeugen innerhalb eines Straßennetzes. Von besonderem Interesse ist dabei, zu welchen Zeitpunkten ein bestimmtes Fahrzeug vorgegebene Positionen im Straßennetz passiert. Hierzu werden in interessierenden Fahrzeugen mobile oder fest installierte Endgeräte mitgeführt, die eine Positionsbestimmungseinrichtung aufweisen. Verbreitet ist hier ein Empfangsmodul für Satellitensignale eines globalen satellitengestützen Navigationssystems, etwa dem amerikanischen NAVSTAR GPS, dem russischen GLONASS oder dem europäischen GALILEO-System. Anhand der Satellitensignale kann zyklisch, beispielsweise sekündlich, die Endgeräteposition und dadurch die Fahrzeugposition eines das Endgerät mitführenden Fahrzeugs bestimmt werden. Ist im Endgerät eine elektronische Landkarte verfügbar, kann die bestimmte Fahrzeugposition zur Landkarte in Beziehung gesetzt werden. Das Mitführen und Aktualisieren von elektronischen Landkarten ist aufwändig und der fortwährende Bezug einer Fahrzeugposition zu einer Landkarte ist für viele interessierende Anwendungen auch nicht erforderlich. Es genügt vielmehr, wenn in einer Speichereinrichtung des Endgerätes die Ortskoordinaten der tatsächlich interessierenden Positionen in einem Straßennetz als Referenzpositionen gespeichert werden. Eine mit der Positionsbestimmungseinrichtung und der Speichereinrichtung zusammenwirkende Verarbeitungseinrichtung kann dann eine aktuell bestimmte Fahrzeugposition mit gespeicherten Referenzpositionen vergleichen. Sie kann dadurch feststellen, ob das Fahrzeug eine der Referenzpositionen passiert hat.A large amount of traffic information is based on determining the position of vehicles within a road network. Of particular interest is the point in time at which a specific vehicle passes through predetermined positions in the road network. For this purpose, mobile or permanently installed terminals that have a position determination device are carried in vehicles of interest. A receiving module for satellite signals from a global satellite-based navigation system, such as the American NAVSTAR GPS, the Russian GLONASS or the European GALILEO system, is widespread here. The position of the terminal device and thus the vehicle position of a vehicle carrying the terminal device can be determined cyclically, for example every second, on the basis of the satellite signals. If an electronic map is available in the terminal, the determined vehicle position can be related to the map. Carrying along and updating electronic maps is time-consuming and the continuous reference of a vehicle position to a map is also not necessary for many interesting applications. Rather, it is sufficient if the location coordinates of the actually interesting positions in a road network are stored as reference positions in a memory device of the terminal. A processing device interacting with the position determination device and the memory device can then compare a currently determined vehicle position with stored reference positions. It can thus determine whether the vehicle has passed one of the reference positions.

Aus der Patentschrift US 6,684,155 B1 ist ein Fahrzeugmanagementsystem für Kraftfahrzeuge bekannt, dessen Autokennzeichen zur Identifikation verwendet wird. Im Inneren des Fahrzeugs ist ein GPS-Modul vorgesehen, um globale Positionsbestimmungssignale zu empfangen und damit die Koordinaten der aktuellen Position des Fahrzeugs zu errechnen. Im Fahrzeug ist darüber hinaus ein GPRS-Modul installiert, um drahtlos mit einem Fernsteuerungs-zentrum zu kommunizieren, sowie eine Speichervorrichtung zur Datenspeicherung. Wenn ein Fahrer über eine Zufahrt auf eine Autobahn fährt, muss das Fahrzeug einen Eingangskontrollpunkt passieren. Wenn der fahrzeuginterne Prozessor identifiziert, dass die aktuellen Positionskoordinaten des Fahrzeugs mit den globalen Positionsbestimmungskoordinaten des Eingangskontroll-punkts übereinstimmen, so bedeutet dies, dass das Fahrzeug in die Zufahrt fährt. Wenn das Fahrzeug bestätigt, dass es in die Zufahrt fährt, liest der Prozessor aus der Speichervorrichtung die Zufahrt-ID-Nummer ein, die dem Eingangskontrollpunkt entspricht, und steuert das GPRS-Modul an, eine Kurzmitteilung, die die Zufahrt-ID-Nummer und das Autokennzeichen des Fahr-zeugs enthält, für die Anmeldung beim Fernsteuerungszentrum auszusenden. Nach Empfang der Kurzmitteilung sendet das Steuerungszentrum sofort eine Anmeldungskurzmitteilung zurück, um das Audio-Zubehör oder Video-Zubehör des Fahrzeugs zu aktivieren und dem Fahrer zu melden, dass das Fahrzeug auf die Zu-fahrt der Autobahn gefahren ist. Das gleiche Prozedere wird bei Verlassen der Autobahn durch eine Ausfahrt durchgeführt.From the patent US 6,684,155 B1 a vehicle management system for motor vehicles is known, the license plate number of which is used for identification. A GPS module is provided inside the vehicle to receive global positioning signals and use them to calculate the coordinates of the current position of the vehicle. A GPRS module is also installed in the vehicle to communicate wirelessly with a remote control center and a storage device for data storage. When a driver enters a highway via an access road, the vehicle must pass through an entry checkpoint. If the on-board processor identifies that the vehicle's current position coordinates match the global positioning coordinates of the entry control point, this means that the vehicle is entering the driveway. When the vehicle confirms entering the gateway, the processor reads from the memory device the gateway ID number that corresponds to the entry checkpoint and controls the GPRS module to send a short message containing the gateway ID number and contains the license plate number of the vehicle for registration at the remote control center. Upon receipt of the short message, the control center immediately sends back a registration short message to activate the vehicle's audio or video accessory and notify the driver that the vehicle has entered the highway entrance. The same procedure is carried out when leaving the motorway through an exit.

Um Mess- und Fahrungenauigkeiten abzufangen, wird um die Referenzposition ein Fangkreis als Toleranzbereich gelegt, wobei die Referenzposition als von einem Fahrzeug passiert gilt, wenn es den Fangkreis befahren hat.In order to intercept measurement and driving inaccuracies, a capture circle is placed around the reference position as a tolerance range, with the reference position being considered to have been passed by a vehicle when it has passed the capture circle.

Aus der Offenlegungsschrift DE 10 2006 002 376 A1 ist eine Vorrichtung zur Durchgangsverkehrserkennung mit einem im Fahrzeug eingebauten Endgerät bekannt. Das Endgerät weist ein Positionsbestimmungssystem und eine Rechnereinheit mit Speicher auf. Die Rechnereinheit ist derart ausgestaltet, dass sie anhand der Position des Fahrzeugs ein Ein- und Ausfahren eines vorgegebenen Gebiets erkennt. Hierzu sind im Speicher die Koordinaten der Ein- und Ausfahrstellen vorzugsweise als Geokoordinaten hinterlegt. Die aktuell bestimmte Position wird jeweils mit den im Speicher abgelegten Positionen der Ein- und Ausfahrstellen verglichen. Entspricht die gemessene Position einer Einfahrstelle oder befindet sich die Position in einem Fangkreis um die Einfahrstelle, so wird ein Timer gestartet, der die Zeit bis zum Erreichen einer Ausfahrstelle aufnimmt.From the disclosure document DE 10 2006 002 376 A1 a device for detecting transit traffic with a terminal installed in the vehicle is known. The terminal has a position determination system and a computer unit with memory. The computer unit is designed in such a way that it recognizes driving in and out of a specified area based on the position of the vehicle. For this purpose, the coordinates of the entry and exit points are stored in the memory, preferably as geo-coordinates. The currently determined position is compared with the positions of the entry and exit points stored in the memory. If the measured position corresponds to an entry point or if the position is in a capture circle around the entry point, a timer is started that records the time until an exit point is reached.

Die Offenlegungsschrift DE 102 05 453 A1 offenbart ein Positionsbestimmungsverfahren für ein Verkehrsgebühren-Erhebungssystem. Mittels einer im Fahrzeug vorgesehenen Erfassungseinheit wird die Position des Fahrzeugs bestimmt und mit definierten Referenzpunkten auf einer Strecke verglichen. Die Referenzpunkte weisen Toleranzbereiche mit unterschiedlichen Abmessungen auf, so dass die Referenzpunkte besser an die lokalen Begebenheiten angepasst werden können. Bei benachbarten Referenzpunkten im Bereich von Verzweigungen oder dergleichen, kann mit einem größeren Toleranzbereich eine Abweichung bestimmt und mit einem kleineren Toleranzbereich eine Entscheidung getroffen werden. Unterstützend werden die Fahrthistorie einschließlich Kurvenformen zur genaueren Differenzierung eingesetzt. Befindet sich das Fahrzeug auf einer verkehrsgebührenpflichtigen Strecke, beispielsweise auf einer Autobahn, so werden in Abhängigkeit von der gefahrenen Strecke in einer Berechnungs- und Buchungseinheit Umbuchungen von Verkehrsgebühren vorgenommen.The disclosure document DE 102 05 453 A1 discloses a positioning method for a traffic fee collection system. The position of the vehicle is determined by means of a detection unit provided in the vehicle and compared with defined reference points on a route. The reference points have tolerance ranges with different dimensions, so that the reference points can be better adapted to local conditions. In the case of adjacent reference points in the area of branches or the like, a deviation can be determined with a larger tolerance range and a decision can be made with a smaller tolerance range. The driving history, including curve shapes, is used as a support for more precise differentiation. If the vehicle is on a route that is subject to traffic charges, for example on a freeway, transfers of traffic charges are made in a calculation and accounting unit depending on the route traveled.

Aus der europäischen Veröffentlichung EP 2 511 892 A1 ist ein Verfahren zum Detektieren eines Grenzübertritts eines Fahrzeugs bei elektronischen Straßenmautsystemen bekannt. Die Fahrzeugbewegung wird durch eine Folge von Positionen auf einer digitalen Straßenkarte mit vektorisierten Straßensegmenten repräsentiert. Es wird zunächst ein Schnittpunkt der Grenze mit einem Straßensegment und einer Referenzrichtung in der Orientierung dieses Straßensegments bestimmt.From the European release EP 2 511 892 A1 a method for detecting a border crossing of a vehicle in electronic road toll systems is known. The vehicle movement is represented by a sequence of positions on a digital road map with vectorized road segments. First, an intersection of the boundary with a road segment and a reference direction in the orientation of that road segment is determined.

Es werden fortlaufend Vektoren, die jeweils zwischen einer der Positionen und dem Schnittpunkt bestimmt werden, auf die Referenzrichtung projiziert, um eine Folge von Projektionen zu erhalten. Ein Grenzübertritt wird detektiert, wenn in der Folge von Projektionen ein Richtungs- oder Vorzeichenwechsel eintritt.Vectors, each of which is determined between one of the positions and the point of intersection, are continuously projected onto the reference direction in order to obtain a sequence of projections. A border crossing is detected when a change of direction or sign occurs in the sequence of projections.

Geht man von einer Ungenauigkeit der Positionsbestimmung mittels GPS von etwa 5 m bis 10 m, einer befahrbaren Straßenbreite im Kreuzungsbereich von etwa 5 m und einer durch die sekündliche Berechnung der Endgeräteposition über zum Beispiel GPS hinzukommenden Verzögerung aus, so müssen Durchmesser von Fangkreisen mindestens 15 m bis 20 m oder mehr betragen. Diese Genauigkeit ist für Anwendungen im regionalen Straßennetz meist ausreichend, im innerstädtischen Bereich mit seinem dichten Straßennetz kann dies teilweise zu Überlappungen der Fangkreise besonders im Kreuzungsbereich führen. Schränkt man den Durchmesser des Fangkreises ein, besteht aber die Gefahr, dass ein Fahrzeug den Fangkreis umfährt und die Referenzposition als nicht passiert angesehen wird.Assuming an inaccuracy in determining the position using GPS of around 5 m to 10 m, a passable road width of around 5 m in the crossing area and an additional delay due to the calculation of the terminal device position using GPS, for example, the diameter of capture circles must be at least 15 m up to 20 m or more. This accuracy is usually sufficient for applications in the regional road network. In inner-city areas with its dense road network, this can sometimes lead to overlapping of the capture circles, especially in the area of intersections. However, if the diameter of the capture circle is restricted, there is a risk that a vehicle will drive around the capture circle and the reference position will not be considered to have passed.

Der Erfindung liegt daher die Aufgabe zugrunde, ein gattungsgemäßes System bereitzustellen, welches eine einfache und sichere Positionsbestimmung auch in einem innerstädtischen Straßennetz ermöglicht.The invention is therefore based on the object of providing a generic system which enables simple and reliable position determination even in an inner-city road network.

Aus WO 2006/054811 A1 ist ein Steuerungssystem für eine Verkehrssignalanlage für Einsatzfahrzeuge bekannt, umfassend: eine Katastrophenschutzvorrichtung zum Erzeugen und Ausgeben einer Notfallsituationsnachricht einschließlich einer Steuerungsidentifikationsinformation für jede der Verkehrssignalsteuerungen für das Einsatzfahrzeug, die auf der Straße installiert sind, durch die das Einsatzfahrzeug fährt, und Fahrzeugbewegungsinformationen, wenn ein Notsituationsauftrittssignal eingegeben wird, und eine Verkehrssignalsteuerung für das Notfallfahrzeug zum Steuern eines Notsignallichts, das ein Warnlicht und ein Richtungssignallicht enthält, gemäß der Notfallsituationsnachricht, die von dem Antikatastrophenzentrum eingegeben wird. Die Verkehrssignalsteuerung weist für das Einfahrtsfahrzeug eine Annäherungsprozesseinheit zum Vergleichen von GPS-Referenzinformationen des Einsatzfahrzeuges, die durch die dritte Kommunikationseinheit eingegeben werden, und GPS-Referenzinformationen zur Steuerung und zur Berechnung auf, wobei ein Bewegungsniveau und eine Bewegungsrichtung des Notfallfahrzeuges ausgegeben wird, wenn das Identifikationssignal für das Notfallfahrzeug von der Notfallverarbeitungseinheit eingegeben wird, und wobei die Verarbeitungseinheit Notsignallichtsteuerinformationen erzeugt und die Steuerinformation an den Notsignallichttreiber auf der Grundlage von Bewegungsniveau und Bewegungsrichtung des Notfallfahrzeuges ausgibt.Out of WO 2006/054811 A1 discloses a traffic signal control system for emergency vehicles, comprising: a disaster prevention device for generating and outputting an emergency situation message including controller identification information for each of traffic signal controllers for the emergency vehicle installed on the road through which the emergency vehicle travels, and vehicle movement information when an emergency situation occurrence signal is input, and a traffic signal controller for the emergency vehicle for controlling an emergency signal light including a warning light and a direction signal light, according to the emergency situation message input from the anti-disaster center. The traffic signal controller has, for the entrance vehicle, an approach processing unit for comparing GPS reference information of the emergency vehicle inputted through the third communication unit and GPS reference information for control and calculation, outputting a movement level and a movement direction of the emergency vehicle when the identification signal for the emergency vehicle is inputted from the emergency processing unit, and wherein the processing unit generates emergency signal light control information and outputs the control information to the emergency signal light driver based on movement level and movement direction of the emergency vehicle.

Aus DE 10 2008 041 091 A1 ist eine Vorrichtung zur Bevorrechtigung eines Fahrzeugs an einer durch eine Lichtsignalanlage geregelten Kreuzung bekannt, mit einer Einrichtung zum Empfangen von Daten zum Ermitteln einer Position des Fahrzeuges, einer Einrichtung zum Erfassen, ob die ermittelte Position des Fahrzeuges innerhalb eines Meldebereichs liegt, und einem Sender zum Senden eines Signals an die Lichtsignalanlage, wenn erfasst ist, dass die Position des Fahrzeuges innerhalb des Meldebereichs liegt.Out of DE 10 2008 041 091 A1 a device for giving priority to a vehicle at an intersection controlled by a traffic light system is known, with a device for receiving data for determining a position of the vehicle, a device for detecting whether the determined position of the vehicle is within a detection range, and a transmitter for Sending a signal to the traffic signal system when it is detected that the vehicle's position is within the detection area.

Aus DE 10 2011 107 881 A1 ist ein System zur Optimierung von Rettungswegen für Einsatzfahrzeuge mit einer Empfangseinrichtung für den fortlaufenden Empfang von Positionsdaten eines Einsatzfahrzeuges bekannt, mit einer Ermittlungseinrichtung zum Ermitteln von Wegpunkten, die ausgehend von den letzten empfangenen Positionsdaten des Einsatzfahrzeugs in den nächsten Zeitpunkten vom Einsatzfahrzeug erreicht werden können, und einer Steuereinrichtung zum Einstellen von Signalanlagen an den ermittelten Wegpunkten zur Optimierung eines Rettungswegs des Einsatzfahrzeugs.Out of DE 10 2011 107 881 A1 a system for optimizing rescue routes for emergency vehicles is known, with a receiving device for the continuous reception of position data from an emergency vehicle, with a determination device for determining waypoints which, based on the last received position data of the emergency vehicle, can be reached by the emergency vehicle in the next few times, and a control device for setting signal systems at the determined waypoints in order to optimize a rescue route of the emergency vehicle.

Die Aufgabe wird erfindungsgemäß gelöst durch ein System der eingangs genannten Art, mit den im kennzeichnenden Teil des Patentanspruches 1 angegebenen Merkmalen. Demnach umfasst ein System zur Ermittlung von Verkehrsinformationen ein in einem Fahrzeug mitgeführtes Endgerät. Das Endgerät weist eine Positionsbestimmungseinrichtung zur Bestimmung einer Fahrzeugposition des Fahrzeugs in einem Straßennetz, eine Speichereinrichtung zur Speicherung von durch Ortskoordinaten definierten Referenzpositionen, und mit einer mit der Positionsbestimmungseinrichtung und der Speichereinrichtung zusammenwirkenden Verarbeitungseinrichtung. Die Verarbeitungseinrichtung ist dazu eingerichtet, eine bestimmte Fahrzeugposition mit gespeicherten Referenzpositionen zu vergleichen, um festzustellen, ob das Fahrzeug eine der Referenzpositionen passiert hat. Erfindungsgemäß ist eine Referenzposition durch eine durch deren Ortskoordinaten verlaufende Fanglinie definiert. Dabei ist die Verarbeitungseinrichtung ausgebildet, festzustellen, ob das Fahrzeug eine Fanglinie traversiert hat, und eine festgestellte Fanglinientraversierung als Fahrzeugpassage der durch die Fanglinie definierten Referenzposition zu werten. Durch die Abkehr der seit langem üblichen kreisflächenförmigen Toleranzbereiche von Referenzpositionen hin zu erfindungsgemäß linearen Toleranzbereichen ermöglicht eine klare Trennung und Erkennung auch von dicht benachbarten Referenzpunkten, wie sie in einem innerstädtischen Straßennetz, insbesondere in Kreuzungsbereichen, vorkommen. Hierdurch kann die Positionsbestimmung auch in solchen Straßennetzen mit größerer Erfassungssicherheit von Fahrzeugpassage an Referenzpositionen erfolgen. Das erfindungsgemäße System umfasst eine dem Straßennetz zugeordnete Verkehrszentrale. Die Verkehrszentrale ist als Leitzentrale für Sonderfahrzeuge zu deren Priorisierung an lichtsignalgesteuerten Knotenpunkten des Straßennetzes ausgebildet, wobei Zufahrten zu Knotenpunkten Referenzpositionen zugeordnet sind. Das Endgerät umfasst eine mit der Verarbeitungseinrichtung zusammenwirkende Meldeeinrichtung, die dazu ausgebildet ist, nach Feststellung einer Passage einer Referenzposition durch das Fahrzeug eine die Ortskoordinaten, einen Passagezeitpunkt und ein Identifikationsdatum des Endgeräts aufweisende Meldung auszugeben. Meldungen werden nur, aber automatisch, ausgegeben, wenn ein Fahrzeug eine Referenzposition passiert hat. Eine fortwährende Übermittlung von Fahrzeugpositionen wird hierbei vermieden. Die Meldungen können zur Weiterverarbeitung an ein auf dem Endgerät ablaufendes Anwendungsprogramm übergeben werden. Alternativ können die Meldungen drahtlos an ein anderes Fahrzeuggerät zur Weiterverarbeitung übergeben werden. Das Endgerät weist eine Kommunikationseinrichtung zur drahtlosen Übertragung ausgegebener Meldungen an die Verkehrszentrale auf. Die Verkehrszentrale ist zur Weiterverarbeitung der Meldungen ausgebildet.The object is achieved by a system of the type mentioned, with the in the characterizing part of Patent claim 1 specified features. Accordingly, a system for determining traffic information includes a terminal carried in a vehicle. The terminal has a position determination device for determining a vehicle position of the vehicle in a road network, a storage device for storing reference positions defined by location coordinates, and a processing device that interacts with the position determination device and the storage device. The processing device is set up to compare a specific vehicle position with stored reference positions in order to determine whether the vehicle has passed one of the reference positions. According to the invention, a reference position is defined by a snap line running through its spatial coordinates. In this case, the processing device is designed to determine whether the vehicle has traversed a capture line and to evaluate a determined capture line traversal as a vehicle passage of the reference position defined by the capture line. By moving away from the long-established circular area-shaped tolerance ranges from reference positions to linear tolerance ranges according to the invention, a clear separation and recognition of closely adjacent reference points, such as those found in an inner-city road network, particularly at intersections, is made possible. As a result, the position can also be determined in such road networks with greater detection reliability of vehicle passages at reference positions. The system according to the invention comprises a traffic control center assigned to the road network. The traffic control center is designed as a control center for special vehicles to prioritize them at traffic signal-controlled junctions in the road network, access roads to junctions being assigned reference positions. The terminal comprises a reporting device which interacts with the processing device and which is designed to output a message containing the location coordinates, a passage time and an identification date of the terminal after determining that the vehicle has passed a reference position. Messages are only issued, but automatically, when a vehicle has passed a reference position. A continuous transmission of vehicle positions is avoided here. The messages can be transferred to an application program running on the terminal for further processing. Alternatively, the messages can be transmitted wirelessly to another vehicle device for further processing. The terminal has a communication device for the wireless transmission of messages that have been issued to the traffic control center. The traffic control center is trained to further process the reports.

In dem erfindungsgemäßen System ist die Fanglinie durch eine an der Referenzposition der Fahrbahn zugeordnete Referenzfahrtrichtung für Fahrzeuge definiert und verläuft quer zu dieser. Die Positionsbestimmungseinrichtung ist zur Bestimmung der Fahrtrichtung des Fahrzeugs ausgebildet. Die Verarbeitungseinrichtung ist dazu ausgebildet, eine bei einer festgestellten Fanglinientraversierung bestimmte Fahrtrichtung des Fahrzeugs mit gespeicherten Referenzfahrtrichtungen zu vergleichen. Insbesondere bei sehr dicht liegenden Referenzpositionen dient der Vergleich der von der Positionsbestimmungseinrichtung gemessenen Fahrtrichtung, die sich aus der Richtung des vergangene Fahrzeugpositionen verbindenden Polygonzuges ergibt, mit der gespeicherten Referenzfahrtrichtung als zusätzliches Entscheidungskriterium für die Feststellung einer Fanglinientraversierung. Insbesondere kann trotz festgestellter Fanglinientraversierung durch ein Fahrzeug eine Passage der Referenzposition ausgeschlossen werden, wenn die Fanglinie vom Fahrzeug in einer stark von der Referenzfahrtrichtung abweichenden Fahrtrichtung überfahren wurde. Vorzugsweise verläuft die Fanglinie senkrecht zur Referenzfahrrichtung.In the system according to the invention, the catch line is defined by a reference travel direction for vehicles assigned to the reference position of the roadway and runs transversely thereto. The position determination device is designed to determine the direction of travel of the vehicle. The processing device is designed to compare a travel direction of the vehicle determined when a capture line traversal is detected with stored reference travel directions. Particularly in the case of very close reference positions, the comparison of the direction of travel measured by the position determination device, which results from the direction of the polygon connecting past vehicle positions, with the stored reference direction of travel serves as an additional decision criterion for determining a trap line traversal. In particular, a passage of the reference position can be ruled out despite the detection of a vehicle traversing the catch line if the vehicle drove over the catch line in a travel direction that deviated greatly from the reference travel direction. The catch line preferably runs perpendicular to the reference travel direction.

In einer bevorzugten Ausgestaltung des erfindungsgemäßen Systems ist die Fanglinie durch eine an der Referenzposition der Fahrbahn zugeordnete Fanglinienlänge definiert. Die Länge der Fanglinie kann an die Breite des Fahrstreifens, der Fahrbahn oder der Straße an jeder Referenzposition gesondert angepasst werden. Liegt die Referenzposition mittig im Straßenbauwerk, so können dessen Ortskoordinaten als Stützpunkt der Fanglinie verwendet werden, zu dessen beiden Seiten sich gleichlange Fanglinienabschnitte anschließen. Dann genügt es, als definierendes Merkmal der Referenzposition die Fanglinienlänge abzuspeichern.In a preferred embodiment of the system according to the invention, the catch line is defined by a catch line length assigned to the reference position of the roadway. The length of the snap line can be adjusted to the width of the lane, lane or road at each reference position separately become. If the reference position is in the middle of the road structure, its location coordinates can be used as the support point for the snap line, on both sides of which are attached snap line sections of equal length. It is then sufficient to save the snap line length as a defining feature of the reference position.

In einer bevorzugten Ausführungsform des erfindungsgemäßen Systems sind in der Speichereinrichtung gespeicherten Referenzpositionen Meldeattribute, umfassend Typ und/oder Adressat und/oder Inhalt und/oder Zyklus einer auszugebenden Meldung, zugeordnet.In a preferred embodiment of the system according to the invention, reference positions stored in the memory device are assigned message attributes, comprising type and/or addressee and/or content and/or cycle of a message to be output.

Vorzugsweise sind in einem erfindungsgemäßen System von der Verkehrszentrale aus mittels der Kommunikationseinrichtung in der Speichereinrichtung des Endgerätes Referenzpositionen hinzufügbar oder löschbar oder deren definierende Merkmale und Meldeattribute änderbar. So können Referenzpositionen dynamisch verändert werden, beispielsweise mit einer temporären Gültigkeit belegt werden.Preferably, in a system according to the invention, reference positions can be added or deleted from the traffic control center by means of the communication device in the storage device of the terminal, or their defining characteristics and reporting attributes can be changed. In this way, reference positions can be changed dynamically, for example assigned a temporary validity.

Weitere Eigenschaften und Vorteile des erfindungsgemäßen Systems ergeben sich aus nachfolgender Beschreibung eines Ausführungsbeispiels anhand der Zeichnungen, in deren einziger Figur ein Straßenabschnitt mit einem erfindungsgemäß definierten Referenzpunkt schematisch veranschaulicht ist.Further properties and advantages of the system according to the invention result from the following description of an exemplary embodiment with reference to the drawings, in the single figure of which a road section with a reference point defined according to the invention is illustrated schematically.

Gemäß der Figur umfasst ein System zur Ermittlung von Verkehrsinformationen ein in einem Fahrzeug V mitgeführtes Endgerät 1 und eine dem vom Fahrzeug V benutzten Straßennetz zugeordnete Verkehrszentrale 2. Das Endgerät 1 weist eine Einrichtung zur Bestimmung einer Fahrzeugposition P des Fahrzeugs V im Straßennetz, beispielsweise auf der dargestellten Fahrbahn S. Aus dem Verbindungsvektor zweier aufeinanderfolgend bestimmter Fahrzeugpositionen P ergibt sich eine Fahrtrichtung D des Fahrzeugs V.According to the figure, a system for determining traffic information comprises a terminal 1 carried in a vehicle V and a terminal 1 assigned to the road network used by the vehicle V Traffic control center 2. The terminal 1 has a device for determining a vehicle position P of the vehicle V in the road network, for example on the roadway S shown. The connection vector of two successively determined vehicle positions P results in a travel direction D of the vehicle V.

Das Endgerät 1 weist eine Speichereinrichtung auf, in der Referenzpositionen R von für eine Verkehrsinformation relevanten Punkten im Straßennetz hinterlegt sind. Die Referenzposition R ist durch eine gerade Fanglinie L definiert, die durch die Ortskoordinaten der Referenzposition R und quer zur Fahrbahn S verläuft. Sie hat eine Fanglinienlänge LL, die beidseitig über die Fahrbahn S hinausragt. Außerdem ist die Fanglinie L durch eine der Referenzposition R zugeordnete Referenzfahrtrichtung LD definiert, die eine durch die Verkehrsführung an der Referenzposition R vorgegebene Bewegungsrichtung darstellt und beispielsweise senkrecht zur Fanglinie L steht.The terminal 1 has a memory device in which reference positions R of points in the road network that are relevant for traffic information are stored. The reference position R is defined by a straight catch line L, which runs through the spatial coordinates of the reference position R and transverse to the roadway S. It has a catch line length LL, which protrudes beyond the lane S on both sides. In addition, the catch line L is defined by a reference travel direction LD assigned to the reference position R, which represents a movement direction predetermined by the traffic routing at the reference position R and is perpendicular to the catch line L, for example.

Mittels einer Verarbeitungseinrichtung wird festgestellt, ob das Fahrzeug V die Fanglinie L traversiert und unter welchem Traversierwinkel α die Fanglinie L überfahren wurde. Hierzu werden die bestimmten Fahrzeugpositionen P mit Lage und Länge der Fanglinie L verglichen werden. Zusätzlich wird die Fahrtrichtung D bei der Fanglinientraverse mit der Referenzfahrtrichtung LD verglichen. Wird unter Einhaltung vorgebbarer Vergleichsgenauigkeiten festgestellt, dass die Fanglinie L in Referenzfahrtrichtung LD überquert wurde, stellt die Verarbeitungseinheit fest, dass das Fahrzeug V die Referenzposition R passiert hat.A processing device is used to determine whether the vehicle V is traversing the catch line L and at what traversing angle α the catch line L was crossed. For this purpose, the determined vehicle positions P are compared with the position and length of the capture line L. In addition, the direction of travel D is compared with the reference travel direction LD at the catch line traverse. If it is determined, while maintaining predeterminable comparison accuracies, that the capture line L has been crossed in the reference travel direction LD, the processing unit determines that the vehicle V has passed the reference position R.

In diesem Fall gibt eine Meldeeinrichtung des Endgeräts 1 eine Meldung M über Ortskoordinaten und Zeitpunkt der Fahrzeugpassage aus. Gegebenenfalls enthält die Meldung M noch ein Identifikationsdatum des Endgeräts 1, damit eine Serie von Meldungen M dem ausgebenden Endgerät 1 zugeordnet werden kann. Mittels einer Kommunikationseinrichtung des Endgeräts 1 wird die ausgegebene Meldung M drahtlos an die Verkehrszentrale 2 zur Weiterverarbeitung übertagen. In der Speichereinrichtung können den Referenzpositionen R bestimmte Meldeattribute zugeordnet werden, wie etwa den Typ und/oder den Adressaten und/oder den Inhalt und/oder den Zyklus einer auszugebenden Meldung M. Umgekehrt sind von der Verkehrszentrale 2 aus mittels der Kommunikationseinrichtung in der Speichereinrichtung des Endgerätes 1 Referenzpositionen R hinzufügbar oder löschbar oder deren definierende Merkmale und Meldeattribute änderbar.In this case, a reporting device of the terminal 1 outputs a message M about the location coordinates and time of the passage of the vehicle. If necessary, the message M also contains identification data for the terminal device 1, so that a series of messages M can be assigned to the terminal device 1 that issued it. Using a communication device of the terminal device 1 the output message M is transmitted wirelessly to the traffic control center 2 for further processing. Certain reporting attributes can be assigned to the reference positions R in the memory device, such as the type and/or the addressee and/or the content and/or the cycle of a message M to be output Terminal 1 reference positions R can be added or deleted or their defining characteristics and reporting attributes can be changed.

Der Vorteil des erfindungsgemäßen Systems besteht darin, dass ohne Verwendung einer digitalen Straßenkarte mittels einer sehr einfach zu generierenden Definition eines Referenzobjektes eine Positionsbestimmung durch ein mobiles Endgerät 1 an vordefinierten Referenzpunkten R durchgeführt werden kann. Die Ausprägung als Fanglinie L kombiniert mit zugehöriger Referenzfahrtrichtung LD und Fanglinienlänge LL ermöglicht eine im Vergleich zu bisherigen Verfahren genauere und sicherere Erkennung des Erreichens oder der Passage einer definierten Referenzposition P. Dabei muss die tatsächliche Ortskoordinate der Referenzposition R nicht exakt erreicht werden. Anders als bei Fangkreisen mit einer ausgedehnten Kreisfläche ist die Referenzfahrtrichtung LD an einer Fanglinie L eindeutig. Die Fanglinienlänge LL kann den örtlichen Gegebenheiten angepasst werden. Das Problem der Überschneidung von benachbarten Referenzobjekten ist bei Fanglinien im Vergleich zu Fangkreisen deutlich reduziert. Das Positionsermittlungsverfahren optimiert auch das zeitliche Verhalten im Endgerät 1 bei der Erkennung einer Referenzposition R. Durch die Verwendung von zusätzlichen Meldeattributen für Referenzpositionen R wird ein universell einsetzbares Verfahren beschrieben, das sowohl für eine Anwendung in einer Verkehrszentrale 2 als auch im selben oder einem weiteren mobilen Endgerät geeignet ist.The advantage of the system according to the invention is that a mobile terminal 1 can determine the position at predefined reference points R without using a digital road map by means of a definition of a reference object that is very easy to generate. The design as a catch line L combined with the associated reference travel direction LD and catch line length LL enables a more precise and reliable detection of reaching or passing a defined reference position P compared to previous methods. The actual spatial coordinates of the reference position R do not have to be reached exactly. In contrast to capture circles with an extended circular area, the reference travel direction LD on a capture line L is unambiguous. The catch line length LL can be adapted to local conditions. The problem of the overlapping of neighboring reference objects is significantly reduced with snap lines compared to snap circles. The position determination method also optimizes the temporal behavior in terminal 1 when recognizing a reference position R. The use of additional reporting attributes for reference positions R describes a universally applicable method that can be used both in a traffic control center 2 and in the same or another mobile terminal is suitable.

Claims (4)

  1. System for ascertaining traffic information, comprising a terminal (1) carried along in a vehicle (V) and having a position determining device for determining a vehicle position (P) of the vehicle (V) in a road network, having a storage device for storing reference positions (R) defined by spatial coordinates, having a processing device, which cooperates with the position determining device and the storage device and which is configured to compare a determined vehicle position (P) with stored reference positions (R) in order to establish whether the vehicle (V) has passed one of the reference positions (R), wherein a reference position (R) is defined by a capture line (L) extending through the spatial coordinates of said reference position, wherein the processing device is configured to establish whether the vehicle (V) has traversed a capture line (L) and to assess an established traversing of the capture line as the vehicle passing the reference position (R) defined by the capture line (L),
    having a traffic control centre (2) assigned to a road network and configured as a supervisory control centre for vehicles (V) configured as special vehicles, for the prioritization thereof at traffic signal-controlled nodes of the road network,
    - wherein reference positions (R) are assigned to accesses to nodes,
    - wherein the terminal (1) comprises a signalling device, which cooperates with the processing device and which is configured, after it has been established that the vehicle (V) has passed a reference position (R), to output a message (M) comprising the spatial coordinates, a passing time and an identification datum of the terminal (1),
    - wherein the terminal (1) comprises a communication device for wireless transmission of output messages (M) to the traffic control centre (2),
    wherein the capture line (L) is defined by a reference travel direction (LD) for vehicles (V), said reference travel direction being assigned to the roadway (S) at the reference position (R), and extends transversely with respect to said reference travel direction,
    wherein the position determining device is configured for determining the travel direction (D) of the vehicle (V), and wherein the processing device is configured to compare a travel direction (D) of the vehicle (V) determined in the event of an established traversing of the capture line with stored reference travel directions (LD), and
    - wherein the traffic control centre (2) is configured for further processing of the messages (M).
  2. System according to Claim 1, wherein the capture line (L) is defined by a capture line length (LL) assigned to the roadway (S) at the reference position (R).
  3. System according to either of Claims 1 and 2, wherein signalling attributes, comprising type and/or addressee and/or content and/or cycle of a message (M) to be output, are assigned to reference positions (R) stored in the storage device.
  4. System according to Claim 3, wherein from the traffic control centre (2), by means of the communication device, in the storage device of the terminal (1), reference positions (R) are addable or erasable or their defining features and signalling attributes are changeable.
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US9741246B2 (en) 2017-08-22
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EP3005334A2 (en) 2016-04-13

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