EP0025388A1 - Messvorrichtung für einen Strassenverkehrsparameter und Signalisierungssystem mit einer solchen Vorrichtung - Google Patents

Messvorrichtung für einen Strassenverkehrsparameter und Signalisierungssystem mit einer solchen Vorrichtung Download PDF

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Publication number
EP0025388A1
EP0025388A1 EP80401243A EP80401243A EP0025388A1 EP 0025388 A1 EP0025388 A1 EP 0025388A1 EP 80401243 A EP80401243 A EP 80401243A EP 80401243 A EP80401243 A EP 80401243A EP 0025388 A1 EP0025388 A1 EP 0025388A1
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EP
European Patent Office
Prior art keywords
section
circuit
vehicles
road traffic
length
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Granted
Application number
EP80401243A
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English (en)
French (fr)
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EP0025388B1 (de
Inventor
Raymond Marcy
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Thales SA
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Thomson CSF SA
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Application filed by Thomson CSF SA filed Critical Thomson CSF SA
Publication of EP0025388A1 publication Critical patent/EP0025388A1/de
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Publication of EP0025388B1 publication Critical patent/EP0025388B1/de
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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
    • G—PHYSICS
    • G08—SIGNALLING
    • G08G—TRAFFIC CONTROL SYSTEMS
    • G08G1/00—Traffic control systems for road vehicles
    • G08G1/07—Controlling traffic signals
    • G08G1/08—Controlling traffic signals according to detected number or speed of vehicles

Definitions

  • the present invention relates to a device for measuring road traffic, and to a signaling system comprising such a device.
  • a signaling system is necessary in order to regulate traffic on this road network.
  • an optical signaling system is used which makes it possible to favor the flow of traffic on one road section rather than another, so as to regularize the traffic in particular at the intersections of streets or high traffic roads or with very different circulation.
  • these signaling systems of the type for example optical
  • This predetermined and fixed value of the passage time of vehicles coming from a determined road section can cause the risk of a traffic jam at this crossroads; traffic conditions change differently during the same day on the sections of track leading to the same crossroads. It is therefore necessary to take into account variations in traffic on the different road sections leading to the same crossroads.
  • the increasing use of heavy and long vehicles such as buses or heavy vehicles semi-trailers, makes it necessary, on the arrival of such a vehicle, to modify the period of the signaling system optics so as to allow them to easily cross this intersection of road sections.
  • the prior art uses devices making it possible to define certain quantities characteristic of road traffic on a given section.
  • the present invention aims to remedy these drawbacks by defining a new parameter directly proportional to the ratio of the spatial density of occupation of a given section by the average speed of the vehicles passing on this section.
  • the device therefore comprises at least two calculation circuits, the first determining the spatial density of occupancy and the average speed of the vehicles passing on this section, the second calculation circuit carrying out the measurement of the arduousness P (t) according to the two preceding variable parameters.
  • Figure 1 shows an embodiment of the device according to the invention for a road section having only one lane. It comprises a first local measurement circuit 1 making it possible to determine the speed and the length of the vehicles entering the road section of length L chosen, a second local measurement circuit 3 located at the exit of the road section of length L, this second circuit local measurement only determining the speed of vehicles leaving the road section.
  • These two local measurement circuits 1 and 3 are respectively connected to two circuits 4 and 8 for determining the average speeds of entry Vem and exit Vsm of the vehicles on the road section II; these two circuits for determining the average input and output speeds 4 and 8 are connected on the one hand to a set of memory circuits, of the shift register type 10, and on the other hand to a circuit 9 for determining the average speed VM of the vehicles over the entire road section 11 of length L.
  • the set of memory circuits of the shift register type 10 is connected to a circuit 12 for determining the spatial occupancy density DE (t).
  • the output of this space occupancy density determination circuit 12 as well that the circuit 9 for determining the average speed VM of the vehicles on the road section 11 are connected to the circuit 20 for calculating the arduousness P (t).
  • the output of this arduousness calculation circuit 20 is connected to an output terminal 21 via a comparator 47.
  • a memory circuit 61 is also connected to the arduousness calculation circuit 20 P (t).
  • the set of memory circuits 10 of the shift register type comprises at least three memory circuits of the shift register type 5, 6, 7 connected in series.
  • the local measurement circuit 1 located at the entrance to the road section 11 of length L, detects the passage of each of the vehicles entering this road section. It then transmits for each vehicle entering the road section 11 on the one hand the speed Vei of this vehicle at the measurement point, on the other hand the length Li of this vehicle, in the form of an uninterrupted succession of binary pulses including the number is directly proportional to the length of the vehicle in question.
  • This succession of binary pulses of unit amplitude is introduced into the set of memory circuits of the shift register type 10 and more particularly into the first memory circuit of the shift register type 5.
  • the propagation speed of the binary word corresponding to a succession of unit binary pulses in this shift type memory register 5 is controlled by a clock circuit not shown here and included in memory circuit 5, the frequency of this clock circuit being directly proportional to the average speed Vem of vehicles entering the road section 11.
  • the transmission speed by successive shifts in the second memory circuit 6 of the binary words represented sensing the length of the vehicles located on the section 11, is controlled by a clock circuit whose frequency is directly proportional to the speed VM previously defined.
  • the third memory circuit 7, also of the shift register type, connected to the output of the second memory circuit 6, is controlled by a clock circuit not shown here, the frequency of which is directly proportional to the average output speed. of the vehicle of the road section 11 considered.
  • the space occupancy density determination circuit 12 continuously measures the ratio between the sum of the lengths Li of each vehicle on the road section, and the length L of this road section. To achieve this result, it continuously receives, in the form of a parallel output from the set of memory circuits 10 of the shift register type, the content of these memory circuits. The total length occupied by the vehicles on this road section is then determined by simple counting of the unit pulses contained in these memory circuits 10. To achieve this result, the circuit 12 for determining the density of spatial occupation may include a circuit of calculation of the microprocessor type making it possible to count and measure the ratio between the sum of the lengths of the vehicles and the length L of the road section 11.
  • the capacity of the memory circuits 5, 6, 7 used depends on the number of binary pulses unit that we are considering to represent a determined length. It is clear that the measurement accuracy of the length of the vehicles on the road section 11 depends directly on the length corresponding to the transmission of a unit pulse by the local measurement circuit 1 and therefore on the frequency d sampling of this local measurement circuit 1. The increase in the measurement accuracy of the length of the vehicles and therefore of the determination of the spatial occupancy density DE (t) also generates an increase in the capacity and therefore of the size and cost of all of the memory circuits 10. The capacity of these memory circuits 10 and therefore the measurement accuracy are thus determined by depending on the road section to which we wish to apply this device.
  • the limitation of the previous embodiment of the device according to the invention to a single channel therefore appears clearly in the above; in fact, the shift registers 5, 6, 7 can only represent the image of vehicles traveling on a single lane and therefore corresponding to traffic on a single lane.
  • the signal DE (t) of the spatial occupancy density from circuit 12 is transmitted in the form of binary words to circuit 20 for calculating the value P (t) of arduousness.
  • the arduousness calculation circuit 20 therefore delivers a value P (t) equal to the ratio of the spatial occupation density DE (t) to the average speed VM of the vehicles on the section L which is renewed at the rate of transmission of the pulses binary of the local measurement circuit 1.
  • This value of the arduousness P (t) is multiplied by a constant ⁇ contained in a memory 61, the role of this constant is to obtain weakest arduousness values to handle.
  • This arduous signal P (t) controls the signaling system, for example of the optical type of a crossroads of a road section. This command can for example be direct, which amounts to saying that the light switching time varies progressively as a function of the values of the arduousness signal P (t).
  • a preferential variant of the control of the signaling system will be done via a comparator 47 permanently comparing the painfulness values P (t) coming from the calculation circuit 20 with predetermined constant coefficients P 0 , P ' 0 contained in a memory that can be included in the comparator 47.
  • This comparator 47 then delivers a control signal to the use system if P (t) is greater than or equal to P o and / or P (t) less than or equal to P ' 0 .
  • P 0 and P ' 0 being numbers whose values are predetermined.
  • Figure 2 shows a second embodiment of the device according to the invention, more particularly usable for a road section of length L multi-ways.
  • the set of calculation circuits 60 in addition to the local measurement circuit 1 identical to that described in the exemplary embodiment of FIG. 1, and delivering the signals corresponding to the length and the speed of the vehicles 2 entering the section road 11, the second local measurement circuit 3 delivering a signal corresponding to the exit speed of vehicles 2 from the road section 11, comprises two circuits 32 and 33 for determining the average speed of entry and exit of vehicles on the section road, these two circuits 32 and 33 for determining the average input and output speeds being controlled by a clock circuit 31 determining the time T during which the average speeds are calculated.
  • the outputs of these two circuits for calculating the average input and output values 32 and 33 are connected to a circuit 34 calculating the average speed VM of the vehicles on the defined road section 11 by the half-sum of the average values of entry and exit of the vehicles on the road section 11, coming from the two calculation circuits 32, 33 of these average values.
  • the output of this circuit 34 for determining the average speed VM on the road section 11 is connected to a comparator 36 also connected to a memory circuit 37, comparing the value of this average speed with a predetermined threshold V 0 .
  • the output of the comparator 36 is connected, on the one hand to the arduousness calculation circuit 20, and on the other hand to a circuit 38 performing the ratio of the length L of the road section 11, contained in a memory 39, with the VM value of the average vehicle speed on this section.
  • the value T of this ratio is applied to a set of controlled switches 40.
  • This set of controlled switches 40 also receives from the local measurement circuit 1, the signals corresponding to the length of the vehicles entering the road section 11.
  • This set of controlled switches 40 is connected to a multiplexer 45 by means of a set of N summing circuits 41, identical.
  • a clock circuit 35 is connected to the control inputs, on the one hand of the set of controlled switches 40 and on the other hand, of the multiplexer 45.
  • the output of this multiplexer 45 is connected to a calculation circuit 70 of the spatial occupation density of the road section 11, this circuit 70 also being connected to the memory circuit 39 containing the value L of the length of the road section 11.
  • the output of this circuit 70 is connected to the circuit 20 for calculating the arduousness P (t).
  • the circuit 34 delivers from the values Vme and Vms average speeds of entry and exit of vehicles 2 of the road section 11, the value VM calculated as above average speed vehicles 2 on the road section 11.
  • a first test is made at the output of this circuit by the comparator 36, making it possible to trigger an alarm if the average speed VM is less than a predetermined threshold V 0 . This alarm signal is available at a terminal 80.
  • the circuit 38 calculates the time T 0 corresponding to the time taken by a vehicle 2 to travel the road section 11.
  • Each summing circuit 41 will then receive the signals corresponding to the lengths of the vehicles from the first local measurement circuit 1, during this time T0.
  • the time intervals T 0 during which each summing circuit 41 performs the sum of the lengths Li corresponding to the vehicles entering the section 11, are offset with respect to each other, for each summing circuit 41 by an equal value.
  • the time interval of length T 0 during which one of the summing circuits 41 will perform the sum of the signals corresponding to the lengths of the vehicles entering the road section 11, is offset from the time interval T 0 during which the summation circuit 41 next will perform the summation of the lengths of the vehicles 2 entering the section 11, for a time equal to T 1 .
  • N represents the number of summing circuits 41 connected between the set of controlled switches 40 and the multiplexer 45, this number N of summing circuits 41 is defined by:
  • the first summing circuit 41 begins again to sum the lengths Li of the vehicles 2 entering the section 11.
  • a cyclic summation is thus obtained during time intervals of constant lengths equal to T 0 , offset from one another by a constant time interval T 1 , depending on the number N of summing circuits 41 which are available between l set of controlled switches 40 and the multiplexer 45.
  • This number N thus determines the frequency of renewal of the information of the measurement of the spatial occupation density DE (t), available at the output of the multiplexer 45.
  • the output of the multiplexer 45 delivers at the rate of the signals from the clock circuit 35, the results of the different summations carried out during time intervals T 0 , of the lengths of the vehicles entering the section 11.
  • the value of the spatial density of occupation DE (t) is determined by a circuit 70 receiving on the one hand, the length L of the section 11 coming from a memory circuit 39, and on the other hand, the signals coming from the multiplexer 45.
  • the calculation of the arduousness P (t) is then done in the same way so that for the device described in FIG. 1.
  • Its use for controlling a signaling system can be done either by means of a comparator 47 as described above, or by the intermediate of a computing circuit 48 transforming the fo nction of the time (t) of the arduous P (t) into a function F (t), this function F being chosen so as to obtain a quasi-linear variation of the arduous function P (t) when the traffic conditions on the section 11 vary.
  • the signals from this circuit 48 can then either directly control the optical signaling system, or control this same optical signaling system but via a comparator not shown here and similar to the comparator 47 described above.
  • circuit 60 calculating from the local measurement circuits 1 and 3, on the one hand the value of the spatial occupation density DE (t), and on the other hand the average speed VM of the vehicles on the stretch road 11.
  • the circuit 12 for determining the density of spatial occupancy can directly deliver a control signal to the signaling system, for example of the optical type, in the case where one of the vehicles represented by the succession of a set of unit binary pulses, corresponds to a greater length and / or equal to a predetermined value permanently stored in a memory included in the circuit 12 for determining the density of spatial occupancy.
  • a control signal to the signaling system, for example of the optical type, in the case where one of the vehicles represented by the succession of a set of unit binary pulses, corresponds to a greater length and / or equal to a predetermined value permanently stored in a memory included in the circuit 12 for determining the density of spatial occupancy.
  • This can be particularly advantageous in the case of a road section over which many heavy vehicles, for example of the bus or truck type are required to pass.
  • the control of the signaling system for example of the optical type, controlled by measuring the arduousness function of this road section can then be doubly controlled, on the one hand by the value of this arduousness function, on the other hand by the signal from circuit 12 for determining the density of spatial occupancy generated at the arrival of a heavy vehicle or of considerable length.
  • a device for measuring road traffic and a signaling system, more particularly of the optical type, comprising such a device have thus been described.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Traffic Control Systems (AREA)
EP80401243A 1979-09-07 1980-08-29 Messvorrichtung für einen Strassenverkehrsparameter und Signalisierungssystem mit einer solchen Vorrichtung Expired EP0025388B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR7922451A FR2465283A1 (fr) 1979-09-07 1979-09-07 Dispositif de mesure du trafic routier, et systeme de signalisation comportant un tel dispositif
FR7922451 1979-09-07

Publications (2)

Publication Number Publication Date
EP0025388A1 true EP0025388A1 (de) 1981-03-18
EP0025388B1 EP0025388B1 (de) 1984-05-30

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EP80401243A Expired EP0025388B1 (de) 1979-09-07 1980-08-29 Messvorrichtung für einen Strassenverkehrsparameter und Signalisierungssystem mit einer solchen Vorrichtung

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US (1) US4390951A (de)
EP (1) EP0025388B1 (de)
DE (1) DE3068036D1 (de)
FR (1) FR2465283A1 (de)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0292897A2 (de) * 1987-05-25 1988-11-30 Siemens Aktiengesellschaft Verfahren zur Bewertung der in Fahrzeugen mittels einer Leit-und Informationseinrichtung gemessenen Reisezeit in einem Leit- und Informationssystem
FR2711000A1 (fr) * 1993-10-08 1995-04-14 Garbarini Sa A Dispositif de gestion de feux de carrefours.
CN105702060A (zh) * 2016-03-04 2016-06-22 重庆交通大学 基于全息投影技术的城市信号交叉口安全导向方法及***
CN106104652A (zh) * 2014-03-26 2016-11-09 日本先锋公司 拥堵判定装置、拥堵判定方法、拥堵判定程序、终端装置、拥堵信息显示方法及拥堵信息显示程序

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NL8402094A (nl) * 1984-07-02 1986-02-03 Philips Nv Werkwijze voor het besturen van een verkeersregelsysteem en het verkeersregelsysteem voor het toepassen van de werkwijze.
US4857921A (en) * 1986-05-30 1989-08-15 Flagman, Inc. Digital traffic control system
US4916621A (en) * 1987-05-18 1990-04-10 Bean John E Microcomputer traffic counter and data collection method
JP2655953B2 (ja) * 1991-07-19 1997-09-24 株式会社日立製作所 交通制御システム
DE59306990D1 (de) * 1992-04-02 1997-09-04 Horizont Holding Gmbh Verfahren und Anlage zur Verkehrsregulierung
JP2816919B2 (ja) * 1992-11-05 1998-10-27 松下電器産業株式会社 空間平均速度および交通量推定方法、地点交通信号制御方法、交通量推定・交通信号制御機制御装置
SE9203474L (sv) * 1992-11-19 1994-01-31 Kjell Olsson Sätt att prediktera trafikparametrar
US5465289A (en) * 1993-03-05 1995-11-07 E-Systems, Inc. Cellular based traffic sensor system
US5572450A (en) * 1995-06-06 1996-11-05 Worthy; David G. RF car counting system and method therefor
DE19650844C2 (de) * 1996-11-27 2003-09-25 Mannesmann Ag Verfahren zur Ermittlung von Fahrtroutendaten
US6427113B1 (en) * 1998-08-05 2002-07-30 Intel Corporation Method for controlling traffic
EP0989503B1 (de) * 1998-09-24 2001-08-16 ULTRA Proizvodnja elektronskih naprav d.o.o. Netzwerksystem mit Ferndatenerfassung
EP1480184A3 (de) * 2003-05-19 2006-06-07 TransVer GmbH Verfahren zur Bestimmung von Verkehrskenngrössen an Bedienstationen
EP1480183A1 (de) * 2003-05-19 2004-11-24 TransVer GmbH Verfahren zur Bestimmung von Verkehrskenngrössen an Bedienstationen
US8996286B1 (en) * 2012-08-03 2015-03-31 Google Inc. Method for analyzing traffic patterns to provide solutions for alleviating traffic problems
US9235989B2 (en) * 2014-02-27 2016-01-12 Siemens Industry, Inc. Adjustment of a traffic signal control plan based on local environmental conditions
CN108629971B (zh) * 2018-05-07 2021-07-02 青海千寻信息科技有限公司 一种交通灯控制方法及最佳车速确定方法
KR20200050155A (ko) * 2018-11-01 2020-05-11 현대자동차주식회사 신호등 정보를 이용한 주행 제어 방법 및 그를 수행하기 위한 차량

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0292897A2 (de) * 1987-05-25 1988-11-30 Siemens Aktiengesellschaft Verfahren zur Bewertung der in Fahrzeugen mittels einer Leit-und Informationseinrichtung gemessenen Reisezeit in einem Leit- und Informationssystem
EP0292897A3 (en) * 1987-05-25 1990-05-09 Siemens Aktiengesellschaft Evaluation method of the travel time measured in vehicles by means of a guidance and information device in a guidance and information system
FR2711000A1 (fr) * 1993-10-08 1995-04-14 Garbarini Sa A Dispositif de gestion de feux de carrefours.
CN106104652A (zh) * 2014-03-26 2016-11-09 日本先锋公司 拥堵判定装置、拥堵判定方法、拥堵判定程序、终端装置、拥堵信息显示方法及拥堵信息显示程序
CN105702060A (zh) * 2016-03-04 2016-06-22 重庆交通大学 基于全息投影技术的城市信号交叉口安全导向方法及***

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Publication number Publication date
DE3068036D1 (en) 1984-07-05
EP0025388B1 (de) 1984-05-30
US4390951A (en) 1983-06-28
FR2465283A1 (fr) 1981-03-20

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