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
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
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)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
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 |
EP0296426B1 (en) * | 1987-06-26 | 1994-04-20 | Siemens Aktiengesellschaft | Data transmitting system for road traffic signal devices |
-
1998
- 1998-07-09 WO PCT/DE1998/001917 patent/WO1999003082A2/en active IP Right Grant
- 1998-07-09 EP EP98946224A patent/EP0995180B1/en not_active Expired - Lifetime
- 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
Non-Patent Citations (1)
Title |
---|
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 |
---|---|
ATE214827T1 (en) | 2002-04-15 |
WO1999003082A2 (en) | 1999-01-21 |
WO1999003082A3 (en) | 1999-04-01 |
EP0995180B1 (en) | 2002-03-20 |
DE59803442D1 (en) | 2002-04-25 |
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