EP0995180A2 - Method and device for controlling light signal installations in accordance with traffic flows - Google Patents
Method and device for controlling light signal installations in accordance with traffic flowsInfo
- Publication number
- EP0995180A2 EP0995180A2 EP98946224A EP98946224A EP0995180A2 EP 0995180 A2 EP0995180 A2 EP 0995180A2 EP 98946224 A EP98946224 A EP 98946224A EP 98946224 A EP98946224 A EP 98946224A EP 0995180 A2 EP0995180 A2 EP 0995180A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- traffic
- control
- light signal
- signal systems
- transmitted
- 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
Links
- 238000000034 method Methods 0.000 title claims description 18
- 238000009434 installation Methods 0.000 title abstract 4
- 230000001419 dependent effect Effects 0.000 claims description 14
- 238000003908 quality control method Methods 0.000 abstract description 2
- 230000005540 biological transmission Effects 0.000 description 4
- 230000001133 acceleration Effects 0.000 description 3
- 238000005259 measurement Methods 0.000 description 2
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 230000003134 recirculating effect Effects 0.000 description 1
- 238000012552 review Methods 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G08—SIGNALLING
- G08G—TRAFFIC CONTROL SYSTEMS
- G08G1/00—Traffic control systems for road vehicles
- G08G1/07—Controlling traffic signals
- G08G1/081—Plural intersections under common control
Definitions
- the invention relates to a method and a device for traffic-dependent control of light signal systems according to the preamble of claim 1.
- EP 0 296 426 discloses a data transmission system for traffic signal systems in which a central traffic computer is connected to a plurality of microprocessor-controlled control devices at traffic nodes, both data transfer from the traffic computer to the control device and transmission of measurement data from the control device to the traffic computer being possible. With this method, it is only possible to transmit the recorded data to the traffic computer in real time, so that permanent data transmission must be guaranteed. Permanent data transmission of the measurement data from all control units to the traffic computer supplies a number of data which cannot be processed in complex traffic systems in a reasonable time frame. thats why such a system is not suitable for the analysis of acceleration measures.
- a target state of the respective control device is defined by target areas for critical indicators such as waiting times for traffic flows, occupancy times of detectors or frequency of certain signal groups or phases.
- the target ranges are limited in one or two directions by specifying one or two limit values.
- Unilaterally restricted target ranges are to be specified, for example, for waiting times of buses in front of traffic signal systems by specifying a maximum waiting time as a limit, while bilaterally restricted target ranges are defined, for example, for the occupancy time of detectors.
- the occupancy time should lie between a maximum value (permanent occupancy of the detector by a traffic jam) and a minimum value (vehicles do not even get to the detector due to a traffic jam in front of the detector).
- the Detector data is permanently compared with the limit values already specified in the planning and only detected deviations from the target status are reported to the traffic computer. As a result, the data traffic between the control unit and the traffic computer can be significantly reduced.
- control center can advantageously query other control devices, which in this case transmit their detector data to the traffic computer.
- improved controls of the traffic signal systems are determined in the traffic computer and transmitted to the corresponding control devices.
- the method according to the invention advantageously uses the structure of existing traffic computer control unit systems.
- existing control devices can be used for the inventive method by installing additional control devices.
- the existing intelligence of the control units is used by means of microprocessors that are already installed.
- the method according to the invention is suitable for using the trend in road traffic technology to replace existing permanent connections between control devices and traffic computers by temporary, event-related connections.
- the figure shows a control unit 1, which is generally located at a traffic node and controls the switching states of light signal systems 2 and evaluates data determined by detectors 3.
- the control unit 1 is connected to a traffic computer 5.
- a traffic computer 5 In general, several control units of similar or identical design are connected to a traffic computer 5.
- a traffic engineer in a traffic control center thus has the option of querying the data of the traffic computer 5 via an evaluation computer 6.
- a memory device 7 is now additionally provided in the device according to the invention, in which the accumulated detector data and the associated switching states of the light signal systems are stored for a certain period of time (for example 8 hours).
- the memory unit 7 is preferably designed as a so-called recirculating memory, which deletes the oldest stored detector data and switching states, while the current detector data and
- the storage capacity of the storage device 7 determines the time period for which a retrospective review of the events on the control unit 1 is guaranteed.
- induction loops or infrared-based vehicle detectors are used as detectors 3.
- these detectors 3 are able to determine the amount of traffic on a bus lane or travel times of buses.
- a target state of the control device 1 for the data determined by the detectors 3 has already been established in the traffic planning. For example, maximum values for the waiting time of a tram in front of a traffic light system or waiting times for a bus at the end of a bus lane are defined and stored in control unit 1. Based on measured detector data is constantly checked whether the target state is still maintained. If the waiting times become too long, a status message from the control unit 1 is transmitted to the traffic computer 5 via a temporary connection, which also contains the detector data and switching states stored before this event.
- the detector data and data about the associated phases of the light signal systems 2 of the coordinated operation of control units 1 are additionally transmitted to the traffic computer 5.
- an improved control for the control device 1 is determined in the traffic computer 5, which ensures the desired target state.
- the transmitted, older stored detector data and switching states are also taken into account for the determination, in order to check the effects of changes to the control program in the traffic computer 5.
- a control program is determined from a determined cross-relationship between the length of the green time at a second light signal system, which is far away from the control unit, and the waiting time of buses at a light signal system 2 assigned to the control unit 1, in which the backlog due to a changed green time is reduced in front of the second light signal system, whereby the bus on the light signal system assigned to the control device is no longer hindered in its further travel.
- Programs for improving the traffic-dependent control can then be transmitted to the individual control units 1 by the traffic computer 5.
- the target state can be changed by transferring new limit values from the traffic computer 5 to the control unit 1 if the target state turns out to be impossible to achieve during operation.
- An iterative application of the method optimizes an existing traffic system in the company in order to ensure that the requirements requested by the customer, such as prioritizing local public transport, are ensured.
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Traffic Control Systems (AREA)
Abstract
Description
Beschreibungdescription
Verfahren und Vorrichtung zur verkehrsabhängigen Steuerung von LichtsignalanlagenMethod and device for traffic-dependent control of traffic light systems
Die Erfindung bezieht sich auf ein Verfahren und eine Vorrichtung zur verkehrsabhängigen Steuerung von Lichtsignalanlagen nach dem Oberbegriff des Patentanspruches 1.The invention relates to a method and a device for traffic-dependent control of light signal systems according to the preamble of claim 1.
Im innerstädtischen Bereich, in dem in hohem Maße Beschleunigungsmaßnahmen für den öffentlichen Personennahverkehr durchgeführt werden, steigt durch die mit dieser Aufgabenstellung verbundene Problematik die Komplexität verkehrsabhängiger Steuerungen stark an.In the inner-city area, where acceleration measures for local public transport are carried out to a large extent, the complexity of traffic-related controls increases significantly due to the problems associated with this task.
Wie in jedem komplexen System ist mit dieser Entwicklung auch der Wunsch der Kunden nach Möglichkeiten zur Analyse und Überwachung der Funktion einer solchen verkehrsabhängigen Steuerung stark angestiegen. Zusätzlich wird seit einiger Zeit für den Nachweis der Wirksamkeit von Beschleunigungsmaßnahmen ein konkreter Beleg gefordert. Dieser ist mit den heute im Feld vorhandenen Verkehrsrechnersystemen nicht erstellbar.As in every complex system, this development has also increased the desire of customers for options for analyzing and monitoring the function of such a traffic-dependent control system. In addition, concrete evidence has been required for some time to prove the effectiveness of acceleration measures. This cannot be achieved with the traffic computer systems available in the field today.
Aus EP 0 296 426 ist beispielsweise ein Datenübertragungssystem für Lichtsignalanlagen bekannt, bei dem ein zentraler Verkehrsrechner mit mehreren mikroprozessorgesteuerten Steuergeräten an Verkehrsknoten verbunden ist, wobei sowohl eine Datenübertragung vom Verkehrsrechner zum Steuergerät als auch eine Übertragung von Meßdaten vom Steuergerät zum Verkehrs- rechner möglich ist. Bei diesem Verfahren ist es nur möglich, die aufgenommenen Daten in Echtzeit an den Verkehrsrechner zu übertragen, so daß eine permanente Datenübertragung gewährleistet sein muß. Eine permanente Datenübertragung der Meßda- ten aller Steuergeräte zum Verkehrsrechner liefert eine Anzahl an Daten, die in komplexen Verkehrssystemen nicht in einem vernünftigen Zeitrahmen bearbeitet werden kann. Daher ist ein solches System nicht für die Analyse von Beschleunigungs- maßnahmen geeignet .EP 0 296 426, for example, discloses a data transmission system for traffic signal systems in which a central traffic computer is connected to a plurality of microprocessor-controlled control devices at traffic nodes, both data transfer from the traffic computer to the control device and transmission of measurement data from the control device to the traffic computer being possible. With this method, it is only possible to transmit the recorded data to the traffic computer in real time, so that permanent data transmission must be guaranteed. Permanent data transmission of the measurement data from all control units to the traffic computer supplies a number of data which cannot be processed in complex traffic systems in a reasonable time frame. thats why such a system is not suitable for the analysis of acceleration measures.
Die Analyse wurde daher bisher mit manuellem Aufwand, z.B. durch Beobachtung an einzelnen Knoten bzw. dem elektronischen „Mitschreiben" der Ereignisse an den Knoten und anschließendem manuellen Auswerten durchgeführt.So far, the analysis has therefore been carried out manually, e.g. by observing individual nodes or electronically "recording" the events at the nodes and then manually evaluating them.
Es ist daher Aufgabe der Erfindung, ein Verfahren und eine Vorrichtung der eingangs genannten Art anzugeben, das eine Qualitätskontrolle bestehender Verkehrsplanungsmaßnahmen automatisiert durchführt, wobei bestehende Verkehrsrechner- Systemarchitekturen übernommen werden sollen.It is therefore an object of the invention to provide a method and a device of the type mentioned at the outset which automatically carries out quality control of existing traffic planning measures, with existing traffic computer system architectures being adopted.
Die Aufgabe wird gelöst durch ein Verfahren mit den kennzeichnenden Merkmalen des Anspruches 1.The object is achieved by a method having the characterizing features of claim 1.
Bereits bei der Planung der verkehrsabhängigen Steuerungen wird durch Sollbereiche für kritische Indikatoren wie Warte- zeiten von Verkehrsströmen, Belegungszeiten von Detektoren oder Häufigkeit von bestimmten Signalgruppen oder Phasen ein Sollzustand des jeweiligen Steuergerätes definiert. Dabei sind die Sollbereiche durch Angabe von einem oder zwei Grenzwerten in eine oder zwei Richtungen beschränkt. Einseitig be- schränkte Sollbereiche sind beispielsweise für Wartezeiten von Bussen vor Lichtsignalanlagen durch Angabe einer Höchst- Wartezeit als Grenzwert anzugeben, während zweiseitig beschränkte Sollbereiche beispielsweise für die Belegungszeit von Detektoren definiert werden. Für den Sollzustand soll die Belegungszeit zwischen einem Höchstwert (permanente Belegung des Detektors durch einen Stau) und einem Minimalwert (Fahrzeuge gelangen aufgrund eines Staus vor dem Detektor gar nicht erst bis zum Detektor) liegen.When planning the traffic-dependent controls, a target state of the respective control device is defined by target areas for critical indicators such as waiting times for traffic flows, occupancy times of detectors or frequency of certain signal groups or phases. The target ranges are limited in one or two directions by specifying one or two limit values. Unilaterally restricted target ranges are to be specified, for example, for waiting times of buses in front of traffic signal systems by specifying a maximum waiting time as a limit, while bilaterally restricted target ranges are defined, for example, for the occupancy time of detectors. For the target state, the occupancy time should lie between a maximum value (permanent occupancy of the detector by a traffic jam) and a minimum value (vehicles do not even get to the detector due to a traffic jam in front of the detector).
Darüber hinaus sind eine ganze Reihe weiterer Indikatoren denkbar, zum Beispiel Staumeldungen, Verkehrsmengen, Geschwindigkeiten im Knotenbereich. Im Steuergerät werden die Detektordaten permanent mit den bereits in der Planung vorgegebenen Grenzwerten verglichen und nur erkannte Abweichungen vom Sollzustand zum Verkehrsrechner gemeldet. Dadurch läßt sich der Datenverkehr zwischen Steuergerät und Verkehrsrech- ner in entscheidendem Umfang reduzieren.In addition, a whole range of other indicators are conceivable, for example traffic jam reports, traffic volumes, speeds in the node area. In the control unit, the Detector data is permanently compared with the limit values already specified in the planning and only detected deviations from the target status are reported to the traffic computer. As a result, the data traffic between the control unit and the traffic computer can be significantly reduced.
In vorteilhafter Weise läßt sich bei koordinierten Steuergeräten durch die Zentrale eine Abfrage weiterer Steuergeräte realisieren, die in diesem Fall ihre Detektordaten an den Verkehrsrechner übermitteln. Im Verkehrsrechner werden anhand der übermittelten Detektordaten und der zugeordneten Schalt- zustände der Lichtsignalanlagen verbesserte Steuerungen der Lichtsignalanlagen festgelegt und an die entsprechenden Steuergeräte übertragen. Durch iteratives Anwenden dieses Verfah- rens wird während des Betriebs eine Optimierung der Verkehrs- abhängigen Steuerung erreicht.In the case of coordinated control devices, the control center can advantageously query other control devices, which in this case transmit their detector data to the traffic computer. On the basis of the transmitted detector data and the assigned switching states of the traffic signal systems, improved controls of the traffic signal systems are determined in the traffic computer and transmitted to the corresponding control devices. By using this method iteratively, an optimization of the traffic-dependent control is achieved during operation.
Durch die Protokollierung der Abweichungen vom Sollzustand wird in vorteilhafter Weise auch ein Beleg für die Funktions- fähigkeit der verkehrsabhängigen Steuerung geliefert.By logging the deviations from the target state, evidence of the functionality of the traffic-dependent control is also advantageously provided.
In vorteilhafter Weise nutzt das erfindungsgemäße Verfahren den Aufbau bestehender Verkehrsrechner-SteuergerätSysteme. Wie in Anspruch 6 beschrieben, können bestehende Steuergeräte durch Einbau von zusätzlichen Steuereinrichtungen für das erfindungsgemäße Verfahren genutzt werden. Dabei wird von der bereits bestehenden Intelligenz der Steuergeräte durch bereits eingebaute Mikroprozessoren Gebrauch gemacht.The method according to the invention advantageously uses the structure of existing traffic computer control unit systems. As described in claim 6, existing control devices can be used for the inventive method by installing additional control devices. Here, the existing intelligence of the control units is used by means of microprocessors that are already installed.
Des weiteren ist das erfindungsgemäße Verfahren geeignet, den Trend in der Straßenverkehrstechnik zu nutzen, bestehende permanente Verbindungen zwischen Steuergeräten und Verkehrs- rechner durch temporäre, ereignisbezogene Verbindungen zu ersetzen.Furthermore, the method according to the invention is suitable for using the trend in road traffic technology to replace existing permanent connections between control devices and traffic computers by temporary, event-related connections.
Anhand der einzigen Figur in der Zeichnung wird die Erfindung in einem Ausführungsbeispiel näher erläutert. In der Figur ist ein Steuergerät l dargestellt, das sich im allgemeinen an einem Verkehrsknoten befindet und die Schalt- zustände von Lichtsignalanlagen 2 steuert sowie von Detekto- ren 3 ermittelte Daten auswertet. Das Steuergerät 1 ist mit einem Verkehrsrechner 5 verbunden. Dabei sind im allgemeinen mehrere, ähnlich oder gleich aufgebaute Steuergeräte mit einem Verkehrsrechner 5 verbunden. Ein Verkehrsingenieur in einer Verkehrsleitzentrale hat damit die Möglichkeit, über ei- nen Auswerterechner 6 die Daten des Verkehrsrechners 5 abzufragen.Based on the single figure in the drawing, the invention is explained in more detail in an embodiment. The figure shows a control unit 1, which is generally located at a traffic node and controls the switching states of light signal systems 2 and evaluates data determined by detectors 3. The control unit 1 is connected to a traffic computer 5. In general, several control units of similar or identical design are connected to a traffic computer 5. A traffic engineer in a traffic control center thus has the option of querying the data of the traffic computer 5 via an evaluation computer 6.
In der erfindungsgemäßen Vorrichtung ist nun zusätzlich eine Speichereinrichtung 7 vorgesehen, in der für einen gewissen Zeitraum (zum Beispiel 8 Stunden) die angefallenen Detektordaten sowie die zugeordneten Schaltzustände der Lichtsignalanlagen abgespeichert werden. Vorzugsweise ist die Speichereinheit 7 als ein sogenannter UmlaufSpeicher ausgeführt, der die ältesten eingespeicherten Detektordaten und Schaltzu- stände löscht, während die aktuellen Detektordaten undA memory device 7 is now additionally provided in the device according to the invention, in which the accumulated detector data and the associated switching states of the light signal systems are stored for a certain period of time (for example 8 hours). The memory unit 7 is preferably designed as a so-called recirculating memory, which deletes the oldest stored detector data and switching states, while the current detector data and
Schaltzustände gespeichert werden. Dabei bestimmt die Speicherkapazität der Speichereinrichtung 7 den Zeitraum, für den eine spätere rückschauende Betrachtung der Ereignisse am Steuergerät 1 gewährleistet ist .Switching states are saved. The storage capacity of the storage device 7 determines the time period for which a retrospective review of the events on the control unit 1 is guaranteed.
Als Detektoren 3 werden dabei beispielsweise Induktions- schleifen oder Fahrzeugdetektoren auf Infrarotbasis eingesetzt. Diese Detektoren 3 sind unter anderem in der Lage, die Verkehrsmenge auf einer Busspur oder Reisezeiten von Bussen zu ermitteln.For example, induction loops or infrared-based vehicle detectors are used as detectors 3. Among other things, these detectors 3 are able to determine the amount of traffic on a bus lane or travel times of buses.
Bereits bei der Verkehrsplanung ist ein Sollzustand des Steuergerätes 1 für die von den Detektoren 3 ermittelten Daten festgeschrieben worden. Dabei werden beispielsweise Höchst- werte für die Wartezeit einer Straßenbahn vor einer Lichtsignalanlage oder Wartezeiten eines Busses am Ende einer Bus- spur definiert und im Steuergerät 1 gespeichert. Anhand der gemessenen Detektordaten wird ständig überprüft, ob der Soll- zustand noch aufrechterhalten wird. Werden die Wartezeiten zu lang, so wird eine Zustandsmeldung des Steuergerätes 1 an den Verkehrsrechner 5 über eine temporäre Verbindung übertragen, die auch die zeitlich vor diesem Ereignis gespeicherten Detektordaten und Schaltzustände enthält.A target state of the control device 1 for the data determined by the detectors 3 has already been established in the traffic planning. For example, maximum values for the waiting time of a tram in front of a traffic light system or waiting times for a bus at the end of a bus lane are defined and stored in control unit 1. Based on measured detector data is constantly checked whether the target state is still maintained. If the waiting times become too long, a status message from the control unit 1 is transmitted to the traffic computer 5 via a temporary connection, which also contains the detector data and switching states stored before this event.
Bei mehreren miteinander koordiniert betriebenen Steuergeräten 1 werden zusätzlich die Detektordaten und Daten über die zugehörigen Phasen der Lichtsignalanlagen 2 der koordiniert betriebenen Steuergeräte 1 an den Verkehrsrechner 5 übermittelt.In the case of a plurality of control units 1 operated in a coordinated manner with one another, the detector data and data about the associated phases of the light signal systems 2 of the coordinated operation of control units 1 are additionally transmitted to the traffic computer 5.
Aufgrund der übermittelten Daten wird im Verkehrsrechner 5 eine verbesserte Steuerung für das Steuergerät 1 ermittelt, die den gewünschten Sollzustand gewährleistet. Für die Ermittlung werden auch die übermittelten älteren abgespeicherten Detektordaten und Schaltzustände berücksichtigt, um im Verkehrsrechner 5 die Einflüsse von Änderungen am Steuerpro- gramm zu überprüfen. So wird beispielsweise aus einer ermittelten Querbeziehung zwischen der Länge der Grünzeit an einer zweiten Lichtsignalanlage, welche von dem Steuergerät weit entfernt ist, und der Wartezeit von Bussen an einer dem Steuergerät 1 zugeordneten Lichtsignalanlage 2 ein Steuerprogramm festgelegt, bei dem durch eine veränderte Grünzeit der Rückstau vor der zweiten Lichtsignalanlage reduziert wird, wodurch der Bus an der dem Steuergerät zugeordneten Lichtsignalanlage nicht mehr in seiner Weiterfahrt behindert wird.Based on the transmitted data, an improved control for the control device 1 is determined in the traffic computer 5, which ensures the desired target state. The transmitted, older stored detector data and switching states are also taken into account for the determination, in order to check the effects of changes to the control program in the traffic computer 5. For example, a control program is determined from a determined cross-relationship between the length of the green time at a second light signal system, which is far away from the control unit, and the waiting time of buses at a light signal system 2 assigned to the control unit 1, in which the backlog due to a changed green time is reduced in front of the second light signal system, whereby the bus on the light signal system assigned to the control device is no longer hindered in its further travel.
Programme zur Verbesserung der verkehrsabhängigen Steuerung lassen sich dann an die einzelnen Steuergeräte 1 vom Verkehrsrechner 5 übertragen. Ebenfalls ist der Sollzustand durch Übertragen neuer Grenzwerte vom Verkehrsrechner 5 an das Steuergerät 1 veränderbar, falls sich der Sollzustand im Betrieb als nicht realisierbar herausstellt. Durch iteratives Anwenden des Verfahrens wird ein bestehendes Verkehrssystem im Betrieb optimiert, um so die vom Kunden gewünschten Vorgaben, beispielsweise eine Priorisierung des Öffentlichen Personennahverkehrs (ÖPNV) , sicherzustellen.Programs for improving the traffic-dependent control can then be transmitted to the individual control units 1 by the traffic computer 5. Likewise, the target state can be changed by transferring new limit values from the traffic computer 5 to the control unit 1 if the target state turns out to be impossible to achieve during operation. An iterative application of the method optimizes an existing traffic system in the company in order to ensure that the requirements requested by the customer, such as prioritizing local public transport, are ensured.
Die für dieses Verfahren notwendigen Änderungen lassen sich problemlos in bestehende Verkehrssysteme integrieren. The changes required for this procedure can be easily integrated into existing traffic systems.
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19729394 | 1997-07-09 | ||
DE19729394 | 1997-07-09 | ||
PCT/DE1998/001917 WO1999003082A2 (en) | 1997-07-09 | 1998-07-09 | Method and device for controlling light signal installations in accordance with traffic flows |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0995180A2 true EP0995180A2 (en) | 2000-04-26 |
EP0995180B1 EP0995180B1 (en) | 2002-03-20 |
Family
ID=7835170
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP98946224A Expired - Lifetime EP0995180B1 (en) | 1997-07-09 | 1998-07-09 | Method and device for controlling light signal installations in accordance with traffic flows |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP0995180B1 (en) |
AT (1) | ATE214827T1 (en) |
DE (1) | DE59803442D1 (en) |
WO (1) | WO1999003082A2 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7312254B2 (en) | 2003-08-22 | 2007-12-25 | Sartomer Technology Company, Inc. | High temperature stabilization of UV systems |
Family Cites Families (9)
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US3967245A (en) * | 1970-03-06 | 1976-06-29 | Omron Tateisi Electronics Co. | Traffic signal control device with core memory |
FR2344902A1 (en) * | 1976-03-18 | 1977-10-14 | Sfim | Electronic traffic light control system - uses process timer with microprocessor having two memories |
FR2457529A1 (en) * | 1979-05-21 | 1980-12-19 | Christian Franceries | VEHICLE TRAFFIC CONTROL METHOD, DEVICE FOR CARRYING OUT THIS METHOD AND APPLICATION OF THIS DEVICE TO TRAFFIC SIMULATION |
DE2923121A1 (en) * | 1979-06-07 | 1980-12-18 | Siemens Ag | METHOD AND CIRCUIT ARRANGEMENT FOR CARRYING OUT A PLAUSIBILITY CHECK WITH REGARD TO FOLLOWING TIME INFORMATION IN TRAFFIC SIGNAL SYSTEMS |
DE3003495A1 (en) * | 1980-01-31 | 1981-08-06 | Siemens AG, 1000 Berlin und 8000 München | Traffic light control circuit - has separately assigned memories for light units with access from HF and LF signals from clock generator |
FR2480467A1 (en) * | 1980-04-15 | 1981-10-16 | Garbarani Sa A | CONTROLLER OF ORDERS-PHASES GROUP CROSSINGS AND METHOD THEREOF |
FR2544096B1 (en) * | 1983-04-07 | 1985-08-16 | El Si Sa Entreprise | DEVICE FOR THE SEQUENTIAL SYNCHRONIZATION OF ELECTRICAL OR ELECTRONIC APPARATUS AND / OR MACHINES |
FR2563355B1 (en) * | 1984-04-18 | 1988-04-08 | Do Boi Quyet | ROAD INFORMATION DEVELOPMENT AND DISPLAY DEVICE |
ATE104786T1 (en) * | 1987-06-26 | 1994-05-15 | Siemens Ag | DATA TRANSMISSION SYSTEM FOR ROAD TRAFFIC SIGNAL SYSTEMS. |
-
1998
- 1998-07-09 DE DE59803442T patent/DE59803442D1/en not_active Expired - Fee Related
- 1998-07-09 AT AT98946224T patent/ATE214827T1/en not_active IP Right Cessation
- 1998-07-09 EP EP98946224A patent/EP0995180B1/en not_active Expired - Lifetime
- 1998-07-09 WO PCT/DE1998/001917 patent/WO1999003082A2/en active IP Right Grant
Non-Patent Citations (1)
Title |
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See references of WO9903082A2 * |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7312254B2 (en) | 2003-08-22 | 2007-12-25 | Sartomer Technology Company, Inc. | High temperature stabilization of UV systems |
Also Published As
Publication number | Publication date |
---|---|
WO1999003082A2 (en) | 1999-01-21 |
DE59803442D1 (en) | 2002-04-25 |
WO1999003082A3 (en) | 1999-04-01 |
ATE214827T1 (en) | 2002-04-15 |
EP0995180B1 (en) | 2002-03-20 |
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