CN100495471C - Detector layout method for urban traffic signal control system - Google Patents
Detector layout method for urban traffic signal control system Download PDFInfo
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- CN100495471C CN100495471C CNB2007100553419A CN200710055341A CN100495471C CN 100495471 C CN100495471 C CN 100495471C CN B2007100553419 A CNB2007100553419 A CN B2007100553419A CN 200710055341 A CN200710055341 A CN 200710055341A CN 100495471 C CN100495471 C CN 100495471C
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Abstract
The invention discloses a detector layout method in a city traffic signal control system including the following steps: 1) identifying the type of highway, main way, secondary way, and slip way, 2) identifying the type of strategic, tactical, general and sensitive intersection, 3) determining the type, size, number of strategic, tactical, sensitive detectors of the entire city, and location and quantity of the corresponding detectors laid in various types of roads, 4) installing the strategic, tactical and sensitive detector, and linking them and other equipment with wire or cable, 5) installing the detector to detect bicycle flow on the bicycle Lane, and linking it and other equipment with wire or cable.
Description
Technical field
The present invention relates to the acquisition methods of the basic data of traffic control in a kind of urban traffic control system, relate to the distribution method of detecting device in a kind of urban traffic signal control system in particular.
Background technology
Detecting device is the important means of gathering traffic parameters such as flow, speed, vehicle, occupation rate.Wagon detector groundwork principle at present commonly used is to detect the energy variation that motion or existence because of automobile cause.Used detecting device mainly is divided into fixed and portable two kinds in the urban traffic control system, wherein fixed detecting device has the mode of traffic information collection: (1) adopts magnetic detection technique frequently, (2) adopt ripple detection technique frequently, (3) adopt video detection technology; The mobile traffic information acquisition mode that adopts mainly comprises both at home and abroad: (1) electronic tag detection technique, (2) GPS detection technique.Because toroid winding detector technologies maturation, be easy to grasp, accuracy of detection height, but all weather operations, equipment price is low etc., and characteristics are widely used in the urban traffic control system.
Intelligent transportation system (ITS) is one of effective ways that solve urban transport problems.The essence of ITS is the technology by the advanced person, collect the real-time information of each traffic key elements such as traffic participant, vehicle, roadnet and traffic control department, and these information are effectively flowed between above-mentioned key element, thereby strengthen harmoniously working capability each other, reach the purpose that improves the traffic system operational paradigm on the whole.Traffic data collection is the basis of ITS, and it provides important data to support for effective operation of other ingredient of ITS.
The collection of road traffic system data is to utilize the wagon detector that is laid between the road network node to detect acquisition in real time.Seek out the partial data of urban transportation System Operation.Just must lay detecting device in the respective stretch of city road network.But because urban development, the overlay area is more and more wider, and the density of city road network is also increasing, if all lay detecting device on each highway section, required cost will be very surprising.So, how according to the topological structure of urban road network and the internal relation between each road section traffic volume parameter, in road network, to lay few detecting device of trying one's best and just can obtain given accuracy and complete traffic data, this construction for traffic control system is extremely important.For these reasons, it is imperative to set up the distribution method that a kind of detecting device optimizes.
Summary of the invention
Technical matters to be solved by this invention is to overcome existingly in the prior art to see that the crossing just lays the problem of detecting device, and a kind of distribution method of laying detecting device in the urban traffic signal control system that few detecting device of trying one's best just can obtain given accuracy and complete traffic data in road network is provided.
For solving the problems of the technologies described above, the present invention adopts following technical scheme to be achieved.The technical solution used in the present invention comprises the following steps:
1) determines the road type of through street, major trunk roads, subsidiary road and branch road according to the distribution situation of link characteristics, grade and road traffic flow in the urban road network;
2) determine the crossing type of strategic crossing, tactics crossing, general crossing and responsive crossing according to the distribution situation of link characteristics, grade and crossing traffic flow in the urban road network;
3) determine according to the correlativity of the distribution situation of traffic flow in the quantity of all types of crossings in the urban road network, the urban road network and traffic flow that entire city is laid the type of strategic detecting device, tactics detecting device, sensor detector, size, quantity and determined the respective detection device is laid in position and quantity on all types of roads;
4) strategic detecting device, tactics detecting device and sensor detector are installed, and with electric wire, optical cable or wireless successively with detecting device, teleseme, signal lamp couples together;
5) detecting device of installation and measuring bicycle flow situation on the dedicated Lanes of bicycle, and with electric wire, optical cable or wireless successively with detecting device, teleseme, signal lamp couples together.
Laying strategy detecting device described in the technical scheme is to lay strategic detecting device on each entrance driveway of strategic crossing, each track, highway section all need be laid in principle, can only on the middle lane in highway section, lay strategic detecting device if track vehicle allocation proportion is similar, and in crossing canalization district, lay sensor detector on the per car road; Described laying tactics detecting device is to lay the tactics detecting device on each entrance driveway of tactics crossing, each track, highway section all need be laid in principle, can only on the middle lane in highway section, lay the tactics detecting device if track vehicle allocation proportion is similar, and in crossing canalization district, lay sensor detector on the per car road; Described laying sensor detector is according to induction control needs, lays sensor detector on the crossing inlet road of implementing induction control; Described laying sensor detector is according to track, highway section virtual detector in the road network and virtually puts device to be detected, lays sensor detector on the crossing of some no virtual detector; The installation position of described strategic detecting device should satisfy apart from subtend track 'STOP' line ahead and is not less than 30 meters, be not less than 150 meters apart from this entrance driveway 'STOP' line ahead, road section length less than 180 meters situation under, pay the utmost attention to away from this entrance driveway stop line, two detecting device maximum spacings that are provided with continuously of strategy detecting device are less than the minimum length of wagon of vehicle, also to guarantee accuracy of detection simultaneously, therefore get 2 meters, the spacing of two detecting devices that adjacent two tracks are placed side by side should be at least 2 meters, the length and the width of strategy detecting device are 1 meter, and are arranged on track central authorities; Described sensor detector should be laid near the stop line of crossing inlet track, and sensor detector is 30 meters-35 meters apart from this distance to the entrance driveway stop line; The length of sensor detector and width are 2 meters.
Profitable effect of the present invention is:
(1) the present invention considers the feature difference of each crossing, scientific and rational strategic crossing, tactics crossing, general crossing and the responsive crossing of being divided into, crossing.Proposing strategic crossing will manage and control as special emphasis, the tactics crossing manages and controls as emphasis, the urban traffic control strategy that general management and control are carried out in general crossing, so just can realize scientific management, help improving urban traffic control efficient urban transportation.
(2) according to the control dynamics difference of all kinds of crossings, the present invention is respectively in strategic crossing, laid strategic detecting device on tactics crossing and the general crossing, tactics detecting device and sensor detector, the traffic flow data difference that all kinds of detecting device detected, all kinds of detection data can be shared, for example strategic detecting device detects the car speed that obtains can be the tactics detecting device, sensor detector calculates length of wagon the data support is provided, thereby obtain hour flow in track, significantly reduce the urban transportation system and be the required detector number of statistics telecommunication flow information, and then reduce engineering cost.
(3) according to the historical telecommunication flow information in each bar track (detecting device), calculate also and judge and each bar track (detecting device) track (detecting device) that correlativity is the strongest, thereby the detecting device that satisfies correlated condition mutually virtual device to be detected and the virtual detector of putting of called after respectively.That can lay a detecting device this a pair of virtual putting in device to be detected and the virtual detector, the detection data of another one detecting device can be calculated out, thereby reduce engineering cost by it.Owing to satisfy more than one of the detecting device of correlativity with certain detecting device, therefore can not put device to be detected and break down and cause these two detecting devices can't obtain transport information because of virtual, system can be again finds for them virtually puts device to be detected, thereby the assurance system detects the integrality of data.
(4) system is called absent detecting device to the detecting device that breaks down, same system can find associated detecting device according to detecting device correlativity each other, utilize correlation detector to obtain the data of absent detecting device, thereby the assurance system can not break down and causes systemic-function to descend even paralysis because of individual detectors.
(5) strategic detecting device of the present invention occurs in pairs before and after on a track being, i.e. dual-detector, thus avoid single detecting device detection speed and length of wagon in real time, thus fail to obtain automatically the defective of standard hour flow.
(6) laying of strategic detecting device among the present invention and tactics detecting device fully takes into account the maximum queue length of highway section wagon flow, can judge the traffic behavior of highway section wagon flow fully, provides theoretical for the control strategy of crossing and supports.
(7) installation position of sensor detector among the present invention, avoid because detecting device was laid and far caused phase place green light utilization ratio low, avoided again simultaneously because the detecting device installation position excessively closely causes the vehicle request time to reflect the time less than teleseme, make the vehicle request to realize, thereby fail to realize induction control.
Description of drawings
Fig. 1 is the city road network structural representation;
Fig. 2 is that strategic detecting device is laid synoptic diagram;
Fig. 3 is that the tactics detecting device is laid synoptic diagram;
Fig. 4 is that sensor detector is laid synoptic diagram;
Fig. 5 is the comprehensive artwork synoptic diagram of various detecting devices;
Fig. 6 is a Changchun part road network structure synoptic diagram among the embodiment;
Among the figure: L
1. the spacing (m) of two groups of strategic detecting devices that are provided with continuously, L
2. the spacing (m) of adjacent lane two platoon system detecting device, L
3. the length of detecting device (m), L
4. the width of detecting device (m), L
5. strategic detecting device is apart from the distance (m) of subtend track stop line, L
6. strategic detecting device is apart from this distance to the entrance driveway stop line (m), L
7. sensor detector is apart from this distance to the entrance driveway stop line (m), L
8. the length of sensor detector (m), L
9. the width of sensor detector (m).
Embodiment
The present invention is described in further detail below in conjunction with drawings and Examples:
It is by on the basis that the inherent law of each basic road traffic delay in roadway characteristic, crossing type and the road network in the city road network is analyzed that the detecting device that the present invention proposes is optimized distribution method, a kind of novel detecting device distribution method of proposition.
The road network in all cities constitutes by four types road, promptly is made of through street, major trunk roads, subsidiary road and branch road, divides the technical indicator of road type and consults shown in the table 1.
Urban road classification of table 1 China and the key technical indexes
Consult Fig. 1, with regard to the most of cities of China, system construction in through street is not a lot, only there are several cities such as Beijing, Shanghai to possess, what most of cities possessed is major trunk roads, subsidiary road and branch road, these roads intersect each other to form city road network, and the structure of city road network has directly determined the type of crossing.
According to the ABC Principles of Management Science, urban intersection may be defined as three classes: strategic crossing, tactics crossing, general crossing and responsive crossing.
The strategy crossing is meant big and the main crossing that can reflecting regional traffic characteristics of traffic intensity.This class crossing generally should be crossing and the part complex cross mouth that major trunk roads and major trunk roads intersect, and is strategic crossing in crossing shown in Fig. 11 and crossing 2.The characteristics of urban transportation can be represented in the strategy crossing, are the barometers of urban traffic conditions, and the traffic control effect is played critical effect.The ratio that the strategy crossing accounts for signalized intersections (comprising the crossing that adopt signal controlling) sum is about 5%-10%.
The tactics crossing is meant the big and crossing that play an important role of traffic intensity in coordinating control.This class crossing generally should be crossing and the part complex cross mouth that major trunk roads and subsidiary road intersect, in the crossing shown in Fig. 13, crossing 4, crossing 5, crossing 6, crossing 7, crossing 8, crossing 9 be the tactics crossing.The status of tactics crossing is important, and the traffic control effect is had tangible influence.The ratio that the tactics crossing accounts for signalized intersections (comprising the crossing that adopt signal controlling) sum is about 30%-40%.
General crossing is meant that branch road and major trunk roads or subsidiary road intersect, adopt the crossing that maybe should adopt signal controlling, and 26 is general crossing in the crossing shown in Fig. 1 11 to crossing, and in general the status is inessential in general crossing, lays under tribute.The ratio that general crossing accounts for signalized intersections (comprising the crossing that adopt signal controlling) sum is about 50%-60%.
Responsive crossing is meant and the short crossing that line links to each other and traffic congestion easily takes place this line that be responsive crossing in the crossing shown in Fig. 1 10, this type of crossing is classified as the tactics crossing.
According to ABC management thought, strategic crossing will manage and control as special emphasis, and the tactics crossing manages and controls as emphasis, and general management and control are carried out in general crossing, so just can realize the scientific management to urban transportation.Although the mixed traffic phenomenon at China's ubiquity, finds that after deliberation the traffic flow on the urban road still has clear regularity, is in particular in that timeliness, systematicness and three aspects of correlativity have clear regularity.Variation in the traffic flow one day has the very strong time regularity of distribution, experience peak, flat peak and ebb three phases, and be cyclical variation.Also there is the tangible time regularity of distribution in traffic flow variation in one week, and the change procedure of traffic flow is continuous, sudden change can not occur, unless traffic hazard or incident have taken place.The generation of traffic flow has very strong aggregation characteristic, and its accumulation process is: street lane → branch road → arterial highway, show significant systematicness, and all traffic flows are entities in the city.The correlativity of traffic flow mainly shows three aspects: temporal correlation, spatial coherence and event correlation.The traffic behavior that temporal correlation is meant all crossings rule over time has similarity.Spatial coherence is meant that the traffic behavior variation of some crossing (potential range is far) has very strong consistance, and change procedure is extremely similar.Event correlation is meant the correlativity of traffic flow point-line-surface motion.
The most of urban construction traffic control system of China, economic condition does not also allow to lay a large amount of detecting devices.For this reason, traffic control system is according to management thought, taking with strategic crossing is that strategy is laid for the detecting device that replenishes, simply considers general crossing in core, tactics crossing, according to the correlativity of crossing transport information, utilize the traffic data of strategic crossing and tactics crossing to infer the traffic data of general crossing.The needs of control system can be satisfied like this, the quantity of detecting device can be reduced again.The laying principle of detecting device is: strategic detecting device and sensor detector are laid in strategic crossing; Tactics detecting device and sensor detector are laid in the tactics crossing; Virtual detector is laid in general crossing, and sensor detector (be laid on the major trunk roads or on the branch road) can be laid in some general crossing, carries out half induction control; The bicycle detecting device is laid as required.
The strategy detecting device is laid on the track, highway section, upstream of strategic crossing, be used to detect the detecting device of flow, speed, time occupancy and vehicle queue, be the general data source of traffic flow analysis, prediction and signal timing dial, consult strategic detector location shown in Figure 2 and lay situation.The figure acceptance of the bid shows the import track of a direction of strategic crossing, and each meaning of parameters is as follows:
L
1The spacing (m) of-two groups of detecting devices that are provided with continuously;
L
2The spacing (m) of-adjacent lane two platoon system detecting device;
L
3The length of-detecting device (m);
L
4The width of-detecting device (m);
L
5-strategic detecting device is apart from the distance (m) of subtend track stop line;
L
6-strategic detecting device is apart from this distance to the entrance driveway stop line (m).
The installation position of strategy detecting device should be considered following factor:
(1) accurately measures the magnitude of traffic flow of passing through, avoid the location of bus website, parking lot and pedestrian's serious interference;
(2) can accurately record the cruising speed of vehicle on the highway section, away from the battleground of crossing, upstream, vehicle ' has entered the cruising state during to strategic detecting device;
(3) if there is wagon flow to import point or outflow point on the highway section, strategic detecting device should be located at the downstream of this point, guarantees that tested vehicle is in the cruising state;
(4) position of strategic detecting device should be as far as possible away from the stop line of strategic crossing, and the vehicle of avoiding being lined up often occupies, in case holding time surpasses normal value, illustrates that promptly this crossing queuing is long, should take special controlling schemes.
According to above-mentioned requirements, the installation position of strategic detecting device should satisfy strategic detecting device apart from subtend track 'STOP' line ahead L
5Be not less than 30 meters, strategic detecting device apart from this entrance driveway 'STOP' line ahead L
6Be not less than 150 meters, road section length less than 180 meters situation under, pay the utmost attention to distance away from this entrance driveway stop line.
Two strategic detecting device maximum spacing L that lay continuously
1Be less than the minimum length of wagon of vehicle, also will guarantee accuracy of detection simultaneously, therefore get 2 meters.The spacing L of two groups of detecting devices that adjacent two tracks are placed side by side
2Consider following factor:
(1) vehicle in assurance track, strategic detecting device place can be detected accurately;
(2) vehicle of avoiding cross-line to travel is detected simultaneously by the two platoon system detecting device.
For satisfying above-mentioned condition, should guarantee the spacing L of adjacent lane two platoon system detecting device usually
2Be at least 2 meters, strategic detecting device adopts the length L of detecting device
3Width L with detecting device
4Be 1 meter, and be laid in track central authorities.
The tactics detecting device is laid on the track, highway section, upstream, tactics crossing, be used to detect the detecting device of flow, time occupancy and vehicle queue, can calculate vehicle average velocity by the average length of wagon that strategic detecting device provides, be the significant data source of traffic flow analysis, prediction and signal timing dial, consult tactics detector location shown in Figure 3 and lay situation.The figure acceptance of the bid shows the import track of a direction of tactics crossing, and the position cloth setting parameter of tactics detecting device on the highway section is identical with strategic detector location cloth setting parameter, the laying principle that can consult strategic detecting device.
Sensor detector is laid near the crossing inlet track, be used to detect vehicle and arrive, produce the green light request signal, and can detect the hypersaturated state of entrance driveway, and the detecting device of this import track flow under the unsaturated state, consult sensor detector shown in Figure 4 position and lay situation.The figure acceptance of the bid shows the import track of the direction in crossing that adopts induction type control, and each meaning of parameters is as follows:
L
7-sensor detector is apart from this distance to the entrance driveway stop line (m);
L
8The length of-sensor detector (m);
L
9The width of-sensor detector (m).
Sensor detector is apart from this distance L to the entrance driveway stop line
7Determine the main following factor of considering:
(1) in induction type control, guarantees a unit distance that vehicle crosses in green extension, when vehicle process sensor detector, if signal becomes the parking that red light can guarantee vehicle safety before stop line by green light.
(2) for satisfying above-mentioned condition, sensor detector is apart from this distance L to the entrance driveway stop line
7Get 30 meters to 35 meters.The specification of sensor detector is the length L of sensor detector
8Width L with sensor detector
9Be 2 meters.
Virtual detector is the correlativity according to traffic flow, can predict flow, speed, the occupation rate in sensorless highway section by means of the data that strategic detecting device and tactics detecting device provide, this moment, this highway section was equivalent to lay a detecting device, and this illusory detecting device is called virtual detector.
Virtual to put device to be detected be correlativity according to traffic flow, and available certain normal detecting device is extrapolated the detection data of virtual detector, and this normal detecting device is called virtual putting for detecting device again.
Absent detecting device is meant that the detecting device that breaks down, loses the Data Detection function is called absent detecting device.
Absence is put device to be detected and is meant correlativity according to traffic flow, and available certain normal detecting device is extrapolated the detection data of absent detecting device, and this normal detecting device is called absence again and puts for detecting device.
The bicycle detecting device is to be arranged on the bicycle special lane, the detecting device that is used to detect the bicycle flow and is detained number.Adopt video detector (camera) to detect the flow information of bicycle, be laid in directly over the crossing inlet road stop line, highly carry out high-altitude photo for 5 meters, obtain video image apart from the road surface, detect bicycle flow flow, flow to information.
The preposition bicycle detecting device that turns left is to be arranged on the left-hand rotation bicycle running track, is used to detect the detecting device of left-hand rotation bicycle flow.Consult Fig. 5, this figure is the comprehensive laying synoptic diagram of various detecting devices.
Embodiment
Consult Fig. 6, shown in Fig. 6 is the local road network synoptic diagram in Changchun, supposes unidirectional 4 car lanes in major urban arterial highway highway section, unidirectional 2 tracks of subsidiary road, unidirectional 1 track of branch road.History according to each crossing in this road network detects the road network correlation coefficient r that data obtain each outlet of crossing
2Statistical form, i.e. table 2.
The local road network correlation coefficient r in table 2 Changchun
2Statistical form
Illustrate: because table 2 is too wide, so table 2 is divided into left and right sides two parts, following form is received the right of top form.
The laying situation of detecting device is described with this local road network below:
(1), determined people street, separated amplification path and the Xi'an main road is a major urban arterial highway according to the distribution situation of link characteristics, grade and road traffic flow; Building street, Xinmin Street, comrade street, big pathway and Chongqing road is subsidiary road; Brocade water route and Guangming Lu are branch road;
(2), determined that tentatively crossing 1, crossing 3 are strategic crossing according to the distribution situation of link characteristics, grade and crossing traffic flow; Crossing 6, crossing 7, crossing 8, crossing 9 are the tactics crossing; Crossing 2, crossing 5 are general crossing; Crossing 4 is in the shopping centre, therefore crossing 4 is classified as the tactics crossing; Because the crossing of people street and Xi'an main road is no signal control crossing, therefore strategic crossing has only 1 crossing.
(3) as can be seen from 28 each flow correlation table that export: this road network, the traffic flow correlation coefficient r of 2001,3008,3022,3025, No. 300 outlets
2All less (shown in the black matrix italics in the table 2), what do not have to substitute virtually puts device (r to be detected
20.85), therefore in order to realize the real-time control in this zone, sensor detector should be laid in these several general crossings, obtains real time data.When laying sensor detector:
Sensor detector is apart from this distance L to the entrance driveway stop line
7Get 30 meters;
The length L of sensor detector
8Get 2 meters;
The width L of sensor detector
9Get 2 meters.
(4) because the maximum ratio of tactics crossing is 30%-40%, therefore 3-4 crossing should be arranged is the tactics crossing.According to crossing 4, crossing 6, crossing 7, crossing 8, crossing 9 flow sizes, determine that three crossings wherein are the tactics crossing, wherein there are 2 outlets to be provided with the virtual device to be detected of putting in the crossing 7, therefore crossing 7 is set to the tactics crossing, determines 2 tactics crossings according to the size of flow in crossing 4, crossing 6, crossing 8, crossing 9.Wherein the daily traffic volume of crossing 4, crossing 6, crossing 8, crossing 9 is respectively 231076,271697,235087,267007, therefore decide crossing 6 and be the tactics crossing with crossing 9, promptly crossing 6, crossing 7 are the tactics crossing with crossing 9 in this road network.
(5) the track flow distribution situation according to each highway section is comparatively even, and therefore one group of detecting device is only laid in strategic crossing and tactics crossing on the highway section; When laying strategic detecting device and tactics detecting device:
The spacing L of two groups of detecting devices that are provided with continuously
1Get 2 meters;
The length L of strategy detecting device, tactics detecting device
3Get 1 meter;
The width L of strategy detecting device, tactics detecting device
4Get 1 meter;
Strategy detecting device, tactics detecting device are apart from the distance L of subtend track stop line
5Get 30 meters;
Strategy detecting device, tactics detecting device are apart from this distance L to the entrance driveway stop line
6Get 150 meters.
(6) in strategic crossing 1, lay the sensor detector of strategic detecting device 4 groups (i.e. 8 detecting devices) and 16 2 * 2 meters; Lay 12 tactics detecting devices in tactics crossing 6, tactics crossing 7, tactics crossing 9,7 lay 14 sensor detectors in the crossing.In general crossing 2, general crossing 5, lay 20 sensor detectors; According to road mixed traffic situation, on liberation amplification path and each entrance driveway of crossing, comrade street (i.e. No. 6 crossings), lay 4 bicycle detecting devices.Therefore in this road network, need to lay 74 dissimilar detecting devices altogether.
(7) according to the correlativity of track flow, find out track of not laying detecting device and the track of laying detecting device and have the correlativity of track flow, determine to lay virtual detector on all in this embodiment tracks of not laying detecting device, the strategic detecting device of having laid, tactics detecting device and sensor detector are that the virtual of virtual detector put device to be detected, so that carry out live signal control.
(8) under identical road network situation, if adopt the SCOOT control system to realize live signal control, detecting device according to the SCOOT system is laid principle (laying detecting device on each track, the upstream of each signalized intersections), and then local road network need be laid 106 dissimilar detecting devices in selected Changchun.
(9) or else influence under the situation of control accuracy and control effect, adopt the laying total amount (74 detecting devices) of the method for the invention detecting device to compare with the laying total amount that adopts SCOOT system detecting device, the detecting device laying amount of the method for the invention has reduced 30%, and this has significantly reduced construction investment.
Claims (8)
1. the distribution method of detecting device in the urban traffic signal control system is characterized in that comprising the following steps:
1) determines the road type of through street, major trunk roads, subsidiary road and branch road according to the distribution situation of link characteristics, grade and road traffic flow in the urban road network;
2) determine the crossing type of strategic crossing, tactics crossing, general crossing and responsive crossing according to the distribution situation of link characteristics, grade and crossing traffic flow in the urban road network;
3) determine according to the correlativity of the distribution situation of traffic flow in the quantity of all types of crossings in the urban road network, the urban road network and traffic flow that entire city is laid the type of strategic detecting device, tactics detecting device, sensor detector, size, quantity and determined the respective detection device is laid in position and quantity on all types of roads;
4) strategic detecting device, tactics detecting device and sensor detector are installed, and with electric wire, optical cable or wireless successively with detecting device, teleseme, signal lamp couples together;
5) detecting device of installation and measuring bicycle flow situation on the dedicated Lanes of bicycle, and with electric wire, optical cable or wireless successively with detecting device, teleseme, signal lamp couples together.
2. according to the distribution method of detecting device in the described urban traffic signal control system of claim 1, it is characterized in that, on each entrance driveway of strategic crossing, lay strategic detecting device, each track, highway section all need be laid in principle, can only on the middle lane in highway section, lay strategic detecting device if track vehicle allocation proportion is similar, and in the entrance driveway of crossing, lay sensor detector on the per car road.
3. according to the distribution method of detecting device in the described urban traffic signal control system of claim 1, it is characterized in that, on each entrance driveway of tactics crossing, lay the tactics detecting device, each track, highway section all need be laid in principle, can only on the middle lane in highway section, lay the tactics detecting device if track vehicle allocation proportion is similar, and in the entrance driveway of crossing, lay sensor detector on the per car road.
4. according to the distribution method of detecting device in the described urban traffic signal control system of claim 1, it is characterized in that, when described general crossing is fit to respond to control, then on the entrance driveway of general crossing, lay sensor detector.
5. according to the distribution method of detecting device in the described urban traffic signal control system of claim 1, it is characterized in that according to the correlativity in track, highway section in the road network, determine which track can be provided with virtual detector, which highway section can be the virtual device to be detected of putting.
6. according to the distribution method of detecting device in the described urban traffic signal control system of claim 5, it is characterized in that, according to track, highway section virtual detector in the road network and virtual laying situation of putting device to be detected, on the crossing of no virtual detector, lay sensor detector.
7. according to the distribution method of detecting device in the described urban traffic signal control system of claim 1, it is characterized in that the installation position of strategic detecting device should satisfy apart from subtend track 'STOP' line ahead (L
5) be not less than 30 meters, apart from this entrance driveway 'STOP' line ahead (L
6) be not less than 150 meters, road section length less than 180 meters situation under, pay the utmost attention to away from this entrance driveway stop line;
Two strategic detecting device maximum spacing (L that are provided with continuously
1) be less than the minimum length of wagon of vehicle, also to guarantee accuracy of detection simultaneously, therefore get 2 meters.Spacing (the L of two detecting devices that adjacent two tracks are placed side by side
2) should be at least 2 meters, the length (L of strategic detecting device
3) and width (L
4) be 1 meter, and be arranged on track central authorities.
8. according to the distribution method of detecting device in the described urban traffic signal control system of claim 1, it is characterized in that sensor detector should be arranged near the stop line of crossing inlet track, sensor detector is apart from this distance (L to the entrance driveway stop line
7) be 30 meters-35 meters; Length (the L of sensor detector
8) and width (L
9) be 2 meters.
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2007
- 2007-02-12 CN CNB2007100553419A patent/CN100495471C/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102779415A (en) * | 2012-07-30 | 2012-11-14 | 北京世纪高通科技有限公司 | Method and device for real-time analysis of traffic signal phase |
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