NL2029417B1 - Apparatus, method and system for determining green light duration of traffic light - Google Patents

Apparatus, method and system for determining green light duration of traffic light Download PDF

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Publication number
NL2029417B1
NL2029417B1 NL2029417A NL2029417A NL2029417B1 NL 2029417 B1 NL2029417 B1 NL 2029417B1 NL 2029417 A NL2029417 A NL 2029417A NL 2029417 A NL2029417 A NL 2029417A NL 2029417 B1 NL2029417 B1 NL 2029417B1
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Netherlands
Prior art keywords
vehicles
traffic light
green light
traffic
vehicle
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NL2029417A
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Dutch (nl)
Inventor
Han Farong
Wei Ziqi
Gao Kai
Du Ronghua
Yan Di
Huang Shuo
Ma Deng
Xie Jin
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Univ Changsha Science & Tech
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Publication of NL2029417B1 publication Critical patent/NL2029417B1/en

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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
    • G08G1/042—Detecting movement of traffic to be counted or controlled using inductive or magnetic detectors
    • G—PHYSICS
    • G08—SIGNALLING
    • G08G—TRAFFIC CONTROL SYSTEMS
    • G08G1/00—Traffic control systems for road vehicles
    • G08G1/065—Traffic control systems for road vehicles by counting the vehicles in a section of the road or in a parking area, i.e. comparing incoming count with outgoing count
    • 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

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Traffic Control Systems (AREA)

Abstract

The present invention discloses an apparatus, method and system for determining a green light duration of a traffic light, and relates to the field of traffic information perception and control. The method includes: calculating and obtaining the maximum number of stuck vehicles of a lane group by using the acquired number of incoming vehicles and the acquired number of outgoing vehicles; calculating a saturated time headway by using an acquired time interval; acquiring speed and position information of a vehicle of an on board unit; performing comparison to obtain a critical traffic flow, and calculating and obtaining a green light duration by using the critical traffic flow, preset startup loss time and the saturated time headway. According to the present invention, geomagnetic vehicle detectors mounted on all lanes of an intersection and an on board unit mounted on a vehicle are used to acquire state information of all vehicles on each lane of the intersection, the critical traffic flows of the lanes are determined according to the state information, and the green light duration is calculated by using the critical traffic flow, the preset startup loss time and the saturated time headway, so that the problem of low vehicle passage efficiency caused by unreasonable timing of the traffic light of the intersection can be effectively relieved.

Description

APPARATUS, METHOD AND SYSTEM FOR DETERMINING GREEN LIGHT
DURATION OF TRAFFIC LIGHT
TECHNICAL FIELD
[01] The present invention relates to the field of traffic information perception and control, and particularly relates to an apparatus, method and system for determining a green light duration of a traffic light.
BACKGROUND ART
[02] As the possession quantity of automobiles in China continues to increase, the problem of urban traffic congestion is becoming more and more serious. Optimizing a single-point intersection signal control system and improving the traffic capacity of the intersection has become an effective means to solve this problem. Single-point intersection signal control refers to using traffic lights to allocate the right of passage to vehicles and pedestrians at isolated intersections.
[03] Existing traffic conditions considered by an adaptive control method for determining a duration of a traffic light are a relationship between a traffic flow at an intersection in a certain period of time and a traffic flow in cross directions of the intersection, or the number of vehicles queued in a cycle, without considering a global traffic state, resulting in low vehicle passage efficiency.
SUMMARY
[04] The present invention aims to provide an apparatus, a method and a system for determining a green light duration of traffic lights, which solves the problems of low vehicle passage efficiency of an existing signal light duration determination method.
[05] In order to achieve the above-mentioned purpose, the present invention provides the following solution.
[06] An apparatus for determining a green light duration of a traffic light includes a geomagnetic vehicle detector, an on board unit and a road side unit.
[07] A plurality of groups of geomagnetic vehicle detectors are provided, and one group of geomagnetic vehicle detectors is mounted in each lane.
[08] Each group of geomagnetic vehicle detectors includes a first detector and a second detector; the first detector is mounted on a stop line of the lane, and the second detector is mounted at a position away from the first detector at a preset distance; a region between the first detector and the second detector is a waiting region;
[09] the geomagnetic vehicle detector 1s used to acquire numbers of vehicles driving into and driving out of the waiting region, and calculate the number of stuck vehicles in the waiting region and a saturated time headway according to the number of incoming vehicles and the number of outgoing vehicles;
[10] the on board unit is mounted on an automobile, and is used to transmit speed and position information of a vehicle to the road side unit;
[11] the road side unit is mounted at a road intersection, and is used to acquire the number of the stuck vehicles and the saturated time headway, determine, according to the number of the stuck vehicles, the saturated time headway, and the speed and position information of the vehicle, a critical traffic flow, and calculate a green light duration by using the critical traffic flow and the saturated headway.
[12] A method for determining a green light duration of a traffic light is applied to the above-mentioned apparatus for determining the green light duration of the traffic light. The method for determining the green light duration of the traffic light includes:
[13] acquiring a traffic light initialization signal solution, preset startup loss time and a traffic light phase set of a traffic light;
[14] initializing a green light duration of a current traffic light phase 1 according to the traffic light initialization signal solution, i=1, 2, … n, n denoting a total number of phases;
[15] executing the current traffic light phase i;
[16] acquiring the number of incoming vehicles and the number of outgoing vehicles of a lane group corresponding to a traffic light phase 1+1, the lane group including a plurality of lanes in the same driving direction;
[17] calculating and obtaining the maximum number of stuck vehicles of the lane group by using the number of incoming vehicles and the number of outgoing vehicles;
[18] acquiring a time interval that any two vehicles on the lane continuously pass through the stop line;
[19] calculating the saturated time headway by using the time interval;
[20] acquiring speed and position information of a vehicle of the on board unit;
[21] comparing the speed and position information of the vehicle and the maximum number of stuck vehicles to obtain a critical traffic flow; and
[22] calculating and obtaining a green light duration of the traffic light phase 1+1 by using the critical traffic flow, the preset startup loss time and the saturated time headway.
[23] A system for determining a green light duration of a traffic light includes:
[24] a first acquisition module used to acquire a traffic light initialization signal solution, preset startup loss time and a traffic light phase set of a traffic light;
[25] an initialization module used to initialize a green light duration of a current traffic light phase i according to the traffic light initialization signal solution, 1=1, 2, …, n, n denoting a total number of phases;
[26] an execution module used to execute the current traffic light phase 1;
[27] a second acquisition module used to acquire the number of incoming vehicles and the number of outgoing vehicles of a lane group corresponding to a traffic light phase itl, the lane group including a plurality of lanes in the same driving direction;
[28] a maximum number of stuck vehicles module used to calculate and obtain the maximum number of stuck vehicles of the lane group by using the number of incoming vehicles and the number of outgoing vehicles;
[29] atime interval module used to acquire a time interval that any two vehicles on the lane continuously pass through the stop line;
[30] a saturated time headway module used to calculate the saturated time headway by using the time interval;
[31] a third acquisition module used to acquire speed and position information of a vehicle of the on board unit;
[32] acritical traffic flow module used to compare the speed and position information of the vehicle and the maximum number of stuck vehicles to obtain a critical traffic flow; and
[33] a green light duration module used to calculate and obtain a green light duration of the traffic light phase i+1 by using the critical traffic flow, the preset startup loss time and the saturated time headway.
[34] According to the specific embodiments provided by the present invention, the present invention discloses the following technical effects.
[35] The present invention can effectively relieve the problem of low vehicle passage efficiency caused by unreasonable timing of the traffic lights of the intersection, so that the queuing time of the vehicles at the intersection is reduced, and emissions of the vehicles are effectively reduced at the same time.
BRIEFT DESCRIPTION OF THE DRAWINGS
[36] In order to describe the embodiments of the present invention or technical solutions in the existing art more clearly, drawings required to be used in the embodiments will be briefly introduced below. Apparently, the drawings in the descriptions below are only some embodiments of the present invention. Those ordinarily skilled in the art also can acquire other drawings according to these drawings without creative work.
[37] FIG. 1 is a structural diagram of an apparatus for determining a green light duration of a traffic light provided by the embodiments of the present invention;
[38] FIG. 2 is a flowchart of a method for determining a green light duration of a traffic light provided by the embodiments of the present invention;
[39] FIG. 3 is a system diagram of a system for determining a green light duration of a traffic light provided by the embodiments of the present invention; and
[40] FIG. 4 is a schematic diagram of arrangement of geomagnetic vehicle detectors provided by the embodiments of the present invention.
[41] 1: Geomagnetic vehicle detector; 2: on board unit; 3: road side unit; and 4:
waiting region.
DETAILED DESCRIPTION OF THE EMBODIMENTS
[42] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Apparently, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments.
Based on the embodiments in the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present invention.
[43] The present invention aims to provide an apparatus, a method and a system for determining a green light duration of traffic lights, which solves the problems of low vehicle passage efficiency of an existing signal light duration determination method.
[44] In order to make the above-mentioned purposes, characteristics and advantages of the present invention more obvious and understandable, the present invention is further described in detail below with reference to the accompanying drawings and specific implementation modes.
[45] The present embodiment provides an apparatus for determining a green light duration of a traffic light. FIG. 1 is a structural diagram of an apparatus for determining a green light duration of a traffic light provided by the embodiments of the present invention. Referring to FIG. 1, the apparatus for determining the green light duration of the traffic light includes a geomagnetic vehicle detector 1, an on board unit 2 and a road side unit 3.
[46] A plurality of groups of geomagnetic vehicle detectors 1 are provided, and one group of geomagnetic vehicle detectors 1 is mounted in each lane. The geomagnetic vehicle detectors 1 are wirelessly connected with the road side unit 3.
[47] Each group of geomagnetic vehicle detectors includes a first detector and a second detector; the first detector is mounted on a stop line of the lane, and the second detector is mounted at a position away from the first detector at a preset distance; and a region between the first detector and the second detector is a waiting region. The first detector is used to detect the number of incoming vehicles driving into the waiting region, and the second detector is used to detect the number of outgoing vehicles driving out of the waiting region. A length of the waiting region, i.e, a preset distance between the second detector and the first detector, can be determined according to the greatest queuing length of vehicles at an intersection where the traffic light is located.
[48] The geomagnetic vehicle detector is used to acquire the number of incoming vehicles driving into the waiting region and the number of outgoing vehicles driving out of the waiting region, and calculate the number of stuck vehicles in the waiting region and a saturated time headway according to the number of incoming vehicles and the number of outgoing vehicles.
[49] The on board unit 2 is mounted on an automobile, and is used to transmit speed and position information of a vehicle to the road side unit 3. The on board unit 2 includes a speed sensor, a vehicle positioning sensor, and a vehicle to X (V2X) communication module. The on board unit transmits vehicle real-time state information to the road side unit 3 at a fixed cycle of 200 ms, and the on board unit is mounted around a vehicle- mounted navigation system. The vehicle real-time state information includes real-time position information and speed information of the vehicle. The on board unit is wirelessly connected with the road side unit 3.
[50] The road side unit 3 is mounted at a road intersection, and is used to acquire the number of the stuck vehicles and the saturated time headway, determine, according to the number of the stuck vehicles, the saturated time headway, and the speed and position information of the vehicle, a critical traffic flow, and calculate a green light duration by using the critical traffic flow and the saturated headway.
IS1] The present embodiment provides a method for determining a green light duration of a traffic light, applied to an apparatus for determining a green light duration of a traffic light. FIG. 2 is a flowchart of a method for determining a green light duration of a traffic light provided by the embodiments of the present invention. Referring to FIG. 2, the method for determining the green light duration of the traffic light includes the following steps.
[52] Step 101, a traffic light initialization signal solution, preset startup loss time and a traffic light phase set of a traffic light are acquired.
[53] Step 102, a green light duration of a current traffic light phase 1 is initialized according to the traffic light initialization signal solution, 1=1, 2, ..., n, n denoting a total number of phases.
[54] Step 103, the current traffic light phase i 1s executed.
[55] Step 104, the number of incoming vehicles and the number of outgoing vehicles of a lane group corresponding to a traffic light phase i+1 are acquired, the lane group including a plurality of lanes in the same driving direction.
[56] Step 105, the maximum number of stuck vehicles of the lane group is calculated and obtained by using the number of incoming vehicles and the number of outgoing vehicles.
[57] Step 105 specifically includes the following:
[58] the number of stuck vehicles of a single lane of the lane group is calculated and obtained by using the number of incoming vehicles and the number of outgoing vehicles.
The number of stuck vehicles of the single lane is a difference between the number of incoming vehicles of the single lane and the number of outgoing vehicles.
[59] The numbers of stuck vehicles of all the single lanes are compared to obtain the maximum number of stuck vehicles.
[60] Step 106, a time interval that any two vehicles on the lane continuously pass through the stop line is acquired.
[61] Step 107, a saturated time headway is calculated by using the time interval.
[62] Step 107 specifically includes the following:
[63] a time interval that any two of a plurality of vehicles on the lane continuously pass through the stop line is acquired. Due to the existence of the startup loss time, the time intervals between the first three vehicles are culled out during acquisition of the time interval.
[64] A mean value of a plurality of time intervals is calculated. The mean value is the saturated time headway.
[65] Step 108, speed and position information of a vehicle of the on board unit are acquired.
[66] Step 109, the speed and position information of the vehicle and the maximum number of stuck vehicles are compared to obtain a critical traffic flow.
[67] Step 109 specifically includes the following:
[68] the number of queuing vehicles of the single lane is determined according to the speed and position information of the vehicles.
[69] Whether the number of queuing vehicles is greater than the maximum number of stuck vehicles is determined, and a second determination result is obtained.
[70] If the second determination result is yes, the number of queuing vehicles is determined to be a critical traffic flow.
[71] If the second determination result is no, the maximum number of stuck vehicles is determined to be a critical traffic flow.
[72] Step 110, whether the critical traffic flow is 0 is determined, and a first determination result is obtained.
[73] If the first determination result is no, the step 112 "a green light duration of the traffic light phase i+1 is calculated and obtained by using the critical traffic flow, the preset startup loss time and the saturated time headway" is executed.
[74] Step 111, if the first determination result is yes, 1 is added to 1, and the step 104 "the number of incoming vehicles and the number of outgoing vehicles of a lane group corresponding to a traffic light phase 1+1 are acquired” is re-executed.
[75] Step 112, a green light duration of the traffic light phase 1+1 is calculated and obtained by using the critical traffic flow, the preset startup loss time and the saturated time headway.
[76] Step 112 specifically includes the following:
[77] the green light duration of the traffic light phase i+1 is calculated and obtained according to a formula 7, = ©; — 1) h+t.
[78] In the above formula, 7}, represents the green light duration of the traffic light phase i+1; 0, represents the critical traffic flow; h represents the saturated time headway; and t represents the preset startup loss time.
[79] Step 113, 1 1s added to i, and the step 103 "the current traffic light phase i is executed" is re-executed.
[80] The present embodiment provides a system for determining a green light duration of a traffic light. FIG. 3 is a system diagram of a system for determining a green light duration of a traffic light provided by the embodiments of the present invention.
Referring to FIG. 3, the system for determining the green light duration of the traffic light includes:
[81] a first acquisition module 201 used to acquire a traffic light initialization signal solution, preset startup loss time and a traffic light phase set of a traffic light;
[82] an initialization module 202 used to initialize a green light duration of a current traffic light phase 1 according to the traffic light initialization signal solution, i=1, 2, ..., n, n denoting a total number of phases;
[83] an execution module 203 used to execute the current traffic light phase i;
[84] a second acquisition module 204 used to acquire the number of incoming vehicles and the number of outgoing vehicles of a lane group corresponding to a traffic light phase i+1, the lane group including a plurality of lanes in the same driving direction;
[85] a maximum number of stuck vehicles module 205 used to calculate and obtain the maximum number of stuck vehicles of the lane group by using the number of incoming vehicles and the number of outgoing vehicles;
[86] the maximum number of stuck vehicles module 205 specifically including:
[87] anumber of stuck vehicles unit used to calculate and obtain the number of stuck vehicles of a single lane of the lane group by using the number of incoming vehicles and the number of outgoing vehicles; the number of stuck vehicles of the single lane is a difference between the number of incoming vehicles of the single lane and the number of outgoing vehicles;
[88] a maximum number of stuck vehicles unit used to compare the numbers of stuck vehicles of all the single lanes to obtain the maximum number of stuck vehicles;
[89] atime interval module 206 used to acquire a time interval that any two vehicles on the lane continuously pass through the stop line;
[90] a saturated time headway module 207 used to calculate the saturated time headway by using the time interval;
[91] the saturated time headway module 207 specifically including:
[92] atime interval unit used to acquire a time interval that any two of a plurality of vehicles continuously pass through the stop line; due to the existence of the startup loss time, the time intervals between the first three vehicles are culled out during acquisition of the time interval;
[93] a saturated time headway unit used to calculate a mean value of a plurality of time intervals, the mean value being the saturated time headway;
[94] a third acquisition module 208 used to acquire speed and position information of a vehicle of the on board unit;
[95] a critical traffic flow module 209 used to compare the speed and position information of the vehicle and the maximum number of stuck vehicles to obtain a critical traffic flow;
[96] the critical traffic flow module 209 specifically including:
[97] a number of queuing vehicles unit used to determine the number of queuing vehicles of the single lane according to the speed and position information of the vehicles;
[98] a second determination unit used to determine whether the number of queuing vehicles is greater than the maximum number of stuck vehicles, and obtain a second determination result;
[99] a second yes unit used to determine the number of queuing vehicles to be a critical traffic flow if the second determination result is yes;
[100] a second no unit used to determine the maximum number of stuck vehicles to be a critical traffic flow if the second determination result is no;
[101] a first determination module 210 used to determine whether the critical traffic flow is 0 and obtain a first determination result; execute a green light duration module 212 if the first determination result is no; and execute a first yes module 211 if the first determination result is yes;
[102] the first yes module 211 used to add 1 to i and execute the second acquisition module 204;
[103] the green light duration module 212 used to calculate and obtain a green light duration of the traffic light phase i+1 by using the critical traffic flow, the preset startup loss time and the saturated time headway;
[104] the green light duration module 212 specifically including:
[105] a green light duration unit used to calculate and obtain the green light duration of the traffic light phase i+1 according to a formula 7, = (0, — 1)xh +1,
[106] in the above formula, 7), represents the green light duration of the traffic light phase i+1; On, represents the critical traffic flow; h represents the saturated time headway; and t represents the preset startup loss time; and
[107] areturn module 213 used to add 1 to 1 and execute the module 203.
[108] All the embodiments in the specification are described in a progressive manner.
Contents mainly described in each embodiment are different from those described in other embodiments. Same or similar parts of all the embodiments refer to each other.
The system disclosed by the embodiments is relatively simply described as it corresponds to the method disclosed by the embodiments, and related parts refer to part of the descriptions of the method.
[109] The principle and implementation modes of the present invention are described by applying specific examples herein. The descriptions of the above embodiments are only intended to help to understand the method of the present invention and a core idea of the method. In addition, those ordinarily skilled in the art can make changes to the specific implementation modes and the application scope according to the idea of the present invention. From the above, the contents of the specification shall not be deemed as limitations to the present invention.

Claims (3)

Conclusies L Apparaat voor het bepalen van een groenlichtduur van een verkeerslicht, gekenmerkt door het omvatten van een geomagnetische voertuigdetector, een eenheid- aan-boord en een wegzijde-eenheid, waarbij een veelheid van groepen van geomagnetische voertuigdetectoren verschaft zijn en één groep van geomagnetische voertuigdetectoren gemonteerd is op elke rijstrook; elke groep van geomagnetische voertuigdetectoren een eerste detector en een tweede detector omvat; waarbij de eerste detector gemonteerd is op een stoplijn van de rijstrook en de tweede detector gemonteerd is op een positie weg van de eerste detector op een vooraf ingestelde afstand; waarbij een gebied tussen de eerste detector en tweede detector een wachtgebied is; de geomagnetische voertuigdetector gebruikt wordt om aantallen van voertuigen die het wachtgebied in- en uitrijden te verkrijgen en om het aantal van in het wachtgebied vastzittende voertuigen en een verzadigdetijdvooruitgang te berekenen volgens het aantal inkomende voertuigen en het aantal uitgaande voertuigen; de eenheid-aan-boord gemonteerd is op een automobiel en gebruikt wordt om snelheid- en positie-informatie van een voertuig over te brengen naar de wegzijde- eenheid; de wegzijde-eenheid gemonteerd is op een wegkruispunt en gebruikt wordt om het aantal van de vastzittende voertuigen en de verzadigdetijdvooruitgang te verkrijgen en om, volgens het aantal vastzittende voertuigen, de verzadigdetijdvooruitgang en de snelheid- en positie-informatie van het voertuig, een kritieke verkeersstroom te bepalen en om een groenlichtduur te berekenen middels het gebruiken van de kritieke verkeersstroom en de verzadigdetijdvooruitgang.Claims L Apparatus for determining a green light duration of a traffic light, characterized by comprising a geomagnetic vehicle detector, an on-board unit and a roadside unit, wherein a plurality of groups of geomagnetic vehicle detectors are provided and one group of geomagnetic vehicle detectors mounted on each lane; each group of geomagnetic vehicle detectors includes a first detector and a second detector; wherein the first detector is mounted on a lane stop line and the second detector is mounted at a position away from the first detector by a preset distance; wherein an area between the first detector and second detector is a waiting area; the geomagnetic vehicle detector is used to obtain numbers of vehicles entering and exiting the waiting area and to calculate the number of vehicles stuck in the waiting area and a saturation time advance according to the number of incoming vehicles and the number of outgoing vehicles; the on-board unit is mounted on an automobile and is used to transmit speed and position information from a vehicle to the roadside unit; the roadside unit is mounted at a road intersection and is used to obtain the number of the stuck vehicles and the saturation time progress and, according to the number of the stuck vehicles, the saturation time progress and the speed and position information of the vehicle, to establish a critical traffic flow and to calculate a green light duration using the critical traffic flow and the saturation time advance. 2. Werkwijze voor het bepalen van een groenlichtduur van een verkeerslicht, die toegepast wordt op het apparaat voor het bepalen van de groenlichtduur van het verkeerslicht volgens conclusie 1, met het kenmerk dat de werkwijze voor het bepalen van de groenlichtduur van het verkeerslicht het volgende omvat: het verkrijgen van een verkeerslichtinitialisatiesignaaloplossing, vooraf ingestelde opstartverliestijd en een verkeerslichtfase-instelling van een verkeerslicht; het initialiseren van een groenlichtduur van een huidige verkeerslichtfase 1 volgens de verkeerslichtinitialisatiesignaaloplossing, i=1, 2, ..., n, waarbij n een totaal aantal fases aangeeft, het uitvoeren van de huidige verkeerslichtfase í; het verkrijgen van het aantal van inkomende voertuigen en het aantal van uitgaande voertuigen van een rijstrookgroep die overeenkomt met een verkeerslichtfase 1+ 1, waarbij de rijstrookgroep een veelheid van rijstroken in dezelfde rijrichting omvat; het berekenen en het verkrijgen van het maximum aantal van vastzittende voertuigen in de rijstrookgroep middels het gebruiken van het aantal van inkomende voertuigen en het aantal van uitgaande voertuigen; het verkrijgen van een tijdsinterval dat een van twee voertuigen op de rijstrook ononderbroken door de stoplijn heen gaat; het berekenen van de verzadigdetijdvooruitgang middels het gebruiken van het tijdsinterval; het verkrijgen van snelheid- en positie-informatie van een voertuig van de eenheid-aan-boord; het vergelijken van de snelheid- en positie-informatie van het voertuig en het maximum aantal vastzittende voertuigen om een kritieke verkeersstroom te verkrijgen; en het berekenen en het verkrijgen van een groenlichtduur van de verkeerslichtfase i+] middels het gebruiken van de kritieke verkeersstroom, de vooraf ingestelde opstartverliestijd en de verzadigdetijdvooruitgang.A traffic light green light duration determination method applied to the traffic light green light duration determination apparatus according to claim 1, characterized in that the traffic light green light duration determination method comprises: : obtaining a traffic light initialization signal resolution, preset power-up loss time, and a traffic light phase setting of a traffic light; initializing a green light duration of a current traffic light phase 1 according to the traffic light initialization signal resolution, i=1, 2, ..., n, where n indicates a total number of phases, performing the current traffic light phase í; obtaining the number of incoming vehicles and the number of outgoing vehicles of a lane group corresponding to a traffic light phase 1+1, the lane group comprising a plurality of lanes in the same direction of travel; calculating and obtaining the maximum number of stuck vehicles in the lane group using the number of incoming vehicles and the number of outgoing vehicles; obtaining an interval of time that one of two vehicles in the lane continuously passes through the stop line; calculating the saturation time advance using the time interval; obtaining speed and position information of a vehicle from the on-board unit; comparing the speed and position information of the vehicle and the maximum number of trapped vehicles to obtain a critical traffic flow; and calculating and obtaining a green light duration of the traffic light phase i+] using the critical traffic flow, the preset startup loss time and the saturation time advance. 3. Systeem voor het bepalen van een groenlichtduur van een verkeerslicht, gekenmerkt door het omvatten van het volgende: een eerste acquisitiemodule die gebruikt wordt om een verkeerslichtinitialisatiesignaaloplossing, een vooraf ingestelde opstartverliestijd en een verkeerslichtfase-instelling van een verkeerslicht te verkrijgen; een initialisatiemodule die gebruikt wordt om een groenlichtduur van een huidige verkeerslichtfase i te initialiseren volgens de verkeerslichtinitialisatiesignaaloplossing, i=1, 2, ..., n, waarbij n een totaal aantal fases aangeeft; een uitvoeringsmodule die gebruikt wordt om de huidige verkeerslichtfase i uit te voeren; een tweede acquisitiemodule die gebruikt wordt om het aantal van inkomende voertuigen en het aantal van uitgaande voertuigen van een rijstrookgroep te verkrijgen die overeenkomt met een verkeerslichtfase 1+1, waarbij de rijstrookgroep een veelheid van rijstroken in dezelfde rijrichting omvat; een maximum aantal van vastzittende voertuigen dat gebruikt wordt om het maximum aantal van vastzittende voertuigen van de rijstrookgroep te berekenen en te verkrijgen middels het gebruiken van het aantal inkomende voertuigen en het aantal uitgaande voertuigen; een tijdsintervalmodule die gebruikt wordt om een tijdinterval te verkrijgen dat een van twee voertuigen op de rijstrook ononderbroken door de stoplijn heen gaat; een verzadigdetijdvooruitgangsmodule die gebruikt wordt om de verzadigdetijdvooruitgang te berekenen middels het gebruiken van het tijdsinterval; een derde acquisitiemodule die gebruikt wordt om snelheid- en positie- informatie van een voertuig van de eenheid-aan-boord te verkrijgen; een kritieke verkeersstroommodule die gebruikt wordt om de snelheid- en positie-informatie van het voertuig en het maximum aantal van vastzittende voertuigen te vergelijken om een kritieke verkeersstroom te verkrijgen; en een groenlichtduurmodule die gebruikt wordt om een groenlichtduur van de verkeerslichtfase i+1 te berekenen en te verkrijgen middels het gebruiken van de kritieke verkeersstroom, de vooraf ingestelde opstartverliestijd en de verzadigdetijdvooruitgang.A system for determining a traffic light green light duration, characterized by comprising the following: a first acquisition module used to obtain a traffic light initialization signal resolution, a preset power-up loss time, and a traffic light phase setting of a traffic light; an initialization module used to initialize a green light duration of a current traffic light phase i according to the traffic light initialization signal resolution, i=1, 2, ..., n, where n indicates a total number of phases; an execution module used to execute the current traffic light phase i; a second acquisition module used to obtain the number of incoming vehicles and the number of outgoing vehicles of a lane group corresponding to a traffic light phase 1+1, the lane group comprising a plurality of lanes in the same direction of travel; a maximum number of stuck vehicles used to calculate and obtain the maximum number of stuck vehicles of the lane group using the number of incoming vehicles and the number of outgoing vehicles; a time interval module used to obtain a time interval that one of two vehicles in the lane continuously passes through the stop line; a saturation time advance module used to calculate the saturation time advance using the time interval; a third acquisition module used to obtain speed and position information of a vehicle from the on-board unit; a critical traffic flow module used to compare vehicle speed and position information and the maximum number of trapped vehicles to obtain a critical traffic flow; and a green light duration module used to calculate and obtain a green light duration of the traffic light phase i+1 by using the critical traffic flow, the preset startup loss time and the saturation time advance.
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CN116824883A (en) * 2023-07-11 2023-09-29 武汉理工大学 Continuous flow forming method for intersection straight-right mixed vehicles based on vehicle-road cooperation

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN116824883A (en) * 2023-07-11 2023-09-29 武汉理工大学 Continuous flow forming method for intersection straight-right mixed vehicles based on vehicle-road cooperation
CN116824883B (en) * 2023-07-11 2024-02-13 武汉理工大学 Continuous flow forming method for intersection straight-right mixed vehicles based on vehicle-road cooperation

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