CN108648477A - A kind of traffic control method when the emergency vehicles intersection based on RFID technique is made a dash across the red light - Google Patents

A kind of traffic control method when the emergency vehicles intersection based on RFID technique is made a dash across the red light Download PDF

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CN108648477A
CN108648477A CN201810739286.3A CN201810739286A CN108648477A CN 108648477 A CN108648477 A CN 108648477A CN 201810739286 A CN201810739286 A CN 201810739286A CN 108648477 A CN108648477 A CN 108648477A
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emergency vehicles
vehicle
intersection
straight
track
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CN108648477B (en
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王思晴
王健
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Harbin Institute of Technology
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Harbin Institute of Technology
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    • G—PHYSICS
    • G08—SIGNALLING
    • G08G—TRAFFIC CONTROL SYSTEMS
    • G08G1/00—Traffic control systems for road vehicles
    • G08G1/07—Controlling traffic signals
    • G08G1/087—Override of traffic control, e.g. by signal transmitted by an emergency vehicle

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Abstract

A kind of traffic control method when the emergency vehicles intersection based on RFID technique is made a dash across the red light, traffic control method when making a dash across the red light the present invention relates to emergency vehicles intersection.The present invention when solving the problems, such as that existing emergency vehicles intersection is made a dash across the red light in order to cause traffic accident rate high.The present invention detects the electronic tag of emergency vehicles when RFID reader, and where determining emergency vehicles when track, LED changeable colours track direction board instruction graticule corresponding with track where emergency vehicles becomes red, and the vehicle in front of emergency vehicles is converted into other tracks；LED changeable colours track direction board graticule on track corresponding with the route of emergency vehicles conflict turns yellow, the warning lamp flicker of entrance driveway where the route to conflict with emergency vehicles；Using vehicle forward direction as front, the normal vehicle operation in front of warning lamp, the vehicle deceleration traveling at warning lamp rear, and Stop and give way before stop line；The present invention is used for field of traffic control.

Description

A kind of traffic control when the emergency vehicles intersection based on RFID technique is made a dash across the red light Method
Technical field
Traffic control method when making a dash across the red light the present invention relates to emergency vehicles intersection.
Background technology
For emergency vehicles as a part indispensable in Modern Urban Living, traveling quickly, safe is most important. But its collision accident at the intersection is also frequent occurrence, wherein it is caused by emergency vehicles make a dash across the red light to have sizable ratio. According to the emergency vehicles casualty investigation findings in Virginia, US area, about 31% is happened at signal in emergency vehicles accident Intersection.It is influenced by factors such as intersection vehicle flowrate, sighting distance and running speeds, the vehicle driver on road intersection has It may not notice the arrival of emergency vehicles, still be travelled with higher speed, to bump against with emergency vehicles, be caused extremely Serious loss, suchlike accident have very much.
Currently, emergency vehicles research direction is mainly rescue path optimization, emergency vehicles and the friendship of emergency vehicles in city The coordination control of ventilating signal lamp, the scheduling scheme etc. of emergency vehicles priority pass.Research about emergency vehicles transit time is Tend to flow greatly, and it is how more safely current in the environment of high efficiency, also it is worth further considering.
Invention content
The purpose of the present invention is to solve cause traffic accident rate is high to ask when existing emergency vehicles intersection is made a dash across the red light Topic, and propose traffic control method when a kind of emergency vehicles intersection based on RFID technique is made a dash across the red light.
A kind of traffic control method when the emergency vehicles intersection based on RFID technique is made a dash across the red light includes the following steps：
Step 1：When emergency vehicles enter intersect oral erotism make a dash across the red light by when, determine the route that conflicts with emergency vehicles；
Step 2：According to the route to conflict with emergency vehicles that step 1 determines, determine on the entrance driveway of intersection four The installation site of RFID reader；
Step 3：According to the route to conflict with emergency vehicles that step 1 determines, determine alert on the entrance driveway of intersection four Show the installation site of lamp；
Step 4：Determine the installation site of LED changeable colours track direction board on the entrance driveway of intersection four, the LED can On discoloration track direction board the instruction graticule that is arranged is consistent with corresponding entrance driveway graticule, i.e. the number of track-lines of entrance driveway and direction board Graticule number is consistent, and direction is identical；
Step 5：When RFID reader detects the electronic tag of emergency vehicles, and determines emergency vehicles place track, LED changeable colours track direction board instruction graticule corresponding with track where emergency vehicles becomes red, the vehicle in front of emergency vehicles It is converted into other tracks；LED changeable colours track direction board graticule on track corresponding with the route of emergency vehicles conflict turns yellow, The warning lamp flicker of entrance driveway where the route to conflict with emergency vehicles；Using vehicle forward direction as front, in front of warning lamp Normal vehicle operation, the vehicle deceleration traveling at warning lamp rear, and Stop and give way before stop line；
When the electronic tag of the emergency vehicles is detected or warning lamp and LED changeable colours track by RFID reader again After direction board lights 25 seconds, warning lamp and LED changeable colours track direction board are automatically closed.
The emergency vehicles include ambulance, fire fighting truck etc..
Beneficial effects of the present invention are：
(1) RFID technique is combined by the present invention with RSSI technologies, realizes the identification and positioning of emergency vehicles, so as to Accurately to realize early warning induction function.
(2) how main research emergency vehicles domestic at present quickly move through intersection, and primary study of the present invention is emergent The safety of running red light for vehicle and efficient problem.
(3) this invention removes the hesitants of driver, i.e., by early warning line vehicle can normally travel pass through intersection Mouthful, and is not carried out then by the vehicle of early warning line accordingly slow down simultaneously Stop and give way.
(4) present invention establishes collision rate model, and whether there is or not early warning induction system crash rates to carry out calculating ratio to intersection Compared with progress quantitative analysis.
According to driver's physical condition sample investigation, and consider nature factor, it is assumed that after installation early warning induction device Have 1.1% vehicle it is not parking give way, remaining vehicle parking gives way, the probability to collide at this moment is only 88.6% × 1.1%=0.98% significantly reduces the accident rate that emergency vehicles make a dash across the red light.
RFID technique is of low cost, can accurately identify emergency vehicles by using RFID technique, having efficiently controlled can Change colour track direction board and warning lamp.The method of the present invention can not only improve the safety of emergency vehicles, can more improve emergent The traffic efficiency of vehicle.With continuous ripe and Intelligent road the rapid development of RFID technique, the present invention has prodigious answer Use foreground.
Description of the drawings
Fig. 1 is flow chart of the present invention；
Fig. 2 is RFID technique inner workings figure of the present invention；
Fig. 3 is that straight trip conflict direction board occurs when turning left not independent phase (two phase place) to show situation map；
Fig. 4 is that straight trip conflict direction board occurs when turning left independent phase (two phase place) to show situation map；
Fig. 5 is that straight trip conflict direction board occurs when turning left independent phase (three phases) to show situation map；
Fig. 6 is to occur to turn left conflict direction board when turning left independent phase (three phases) to show situation map；
Fig. 7 is that southing mouth conflicts schematic diagram with east import；A is eastern import conflict fare road and stop line crosspoint, B in figure Conflict with eastern import straight trip fare road crosspoint for southing mouth emergency car circuit of keeping straight on, C be southing mouth emergency car straight trip circuit and Eastern import left-hand rotation conflict fare road crosspoint, M is southing mouth emergency car circuit and stop line crosspoint；
Fig. 8 is that southing mouth conflicts schematic diagram with western import；P is southing mouth emergency car circuit and stop line crosspoint, E in figure Conflict fare road crosspoint for southing mouth emergency car left-hand rotation circuit and western import straight trip, N is western import conflict direction vehicle line With stop line crosspoint, F is that keep straight on circuit and the western import of southing mouth emergency car is kept straight on the fare road crosspoint that conflicts；
Fig. 9 is system and device riding position schematic diagram；A is emergency vehicles in figure, and B is RFID reader, and C is common in-vehicle , D is warning lamp, and E is warning line, and F is LED changeable colours track direction board；
Figure 10 is that through vehicles collide schematic diagram.
Specific implementation mode
Specific implementation mode one：A kind of traffic control method when the emergency vehicles intersection based on RFID technique is made a dash across the red light Include the following steps：
Present system is divided into three modules, i.e. radio-frequency information acquisition module, MCU control module, early warning induction module.When When emergency vehicles are detected by RFID reader, radio-frequency information acquisition module combination RSSI location algorithms identify emergency vehicles The track at place, and collected information is passed into MCU control module.MCU controls the response of early warning induction module：Emergency vehicles The light color in place track becomes red, and the public vehicles in the track is reminded to be converted into other tracks, is the quick of emergency vehicles By providing space；The light color in track becomes yellow where having the wagon flow to conflict with emergency vehicles, and front is reminded to have emergency vehicles It quickly reaches, vehicle should travel at a slow speed, and Stop and give way before stop line.At the same time, the warning lamp for being located at road center dodges Bright, the vehicle before warning lamp does not slow down safety, and must be travelled at a slow speed in the subsequent vehicle of warning lamp.In this way Not only emergency vehicles can have been made quickly through but also improving safety.Workflow such as Fig. 1.
This hardware configuration is divided into three modules, i.e. radio-frequency information acquisition module, MCU control module, early warning induction module.Its Operation principle is as shown in Figure 2.
Radio-frequency information acquisition module：
Mifare1 RF IC cards：RF IC card selects MIFARE MF1 standard cards, efficient by IC microchips and one Rate antenna forms.
MFRC522 reads and writes card chip：MFRC522 is a contactless low power consumption read-write base station ic, receiver part One efficient demodulation decoding circuit, built-in CRC coprocessors and self-checking circuit are provided.
Electronic tag：Electronic tag executes ISO18000-6C consensus standards, and label includes reserved area, EPC, TID, User Four storage areas.
MCU control module：
Main control chip：Main control chips of the STC89C52 as the system is selected, it is a kind of low-power consumption, high-performance CMOS 8 8-digit microcontroller has 16K in-system programmable components flash storages.
Crystal oscillating circuit, digital circuit (including operational amplifier, conventional resistive, voltage-stablizer, power supply and switch etc.).
Early warning induction module：
High-brightness LED strobe warning lamp：Power consumption is about the half (110V/220V exchanges) of incandescent lamp bulb, can be continuously fast The flash of light form of three stroboscopics of speed.
Changeable colour track direction board：Each track arrow is made of the small fluorescent tubes of LED, there is reddish yellow dichromatism.Out of phase is rushed Direction board under prominent shows situation as shown in figures 3 to 6.
Step 1：When emergency vehicles enter intersect oral erotism make a dash across the red light by when, determine the route that conflicts with emergency vehicles；
Step 2：According to the route to conflict with emergency vehicles that step 1 determines, determine on the entrance driveway of intersection four The installation site of RFID reader；
Step 3：According to the route to conflict with emergency vehicles that step 1 determines, determine alert on the entrance driveway of intersection four Show the installation site of lamp；
Step 4：Determine the installation site of LED changeable colours track direction board on the entrance driveway of intersection four, the LED can On discoloration track direction board the instruction graticule that is arranged is consistent with corresponding entrance driveway graticule, i.e. the number of track-lines of entrance driveway and direction board Graticule number is consistent, and direction is identical；
Step 5：When RFID reader detects the electronic tag of emergency vehicles, and determines emergency vehicles place track, LED changeable colours track direction board instruction graticule corresponding with track where emergency vehicles becomes red, the vehicle in front of emergency vehicles It is converted into other tracks；LED changeable colours track direction board graticule on track corresponding with the route of emergency vehicles conflict turns yellow, The warning lamp flicker of entrance driveway where the route to conflict with emergency vehicles；Using vehicle forward direction as front, in front of warning lamp Normal vehicle operation, the vehicle deceleration traveling at warning lamp rear, and Stop and give way before stop line；
When the electronic tag of the emergency vehicles is detected or warning lamp and LED changeable colours track by RFID reader again After direction board lights 25 seconds, warning lamp and LED changeable colours track direction board are automatically closed.
Specific implementation mode two：The present embodiment is different from the first embodiment in that：When emergent in the step 1 Vehicle enter intersect oral erotism make a dash across the red light by when, determine that the detailed process of route to conflict with emergency vehicles is：
Early warning line is with parking position at a distance of the vertical of stopping distance (including driver perception reaction distance and braking distance) Line.When emergency vehicles pass through sensing device, the warning lamp at early warning line can issue warning signal, and pass through early warning line at this time Vehicle can continue to move forward with former speed, and the vehicle after the early warning line then takes corresponding deceleration to handle.
When anxious vehicle drives into intersection from southing mouth, the larger collision course of four kinds of collision probabilities is obtained：
(1) emergency vehicles are kept straight on, eastern imported vehicle straight trip, such as intersecting routes 1 in Fig. 7；
(2) emergency vehicles are kept straight on, and eastern imported vehicle turns left, such as intersecting routes 2 in Fig. 7；
(3) emergency vehicles turn left, western imported vehicle straight trip, such as intersecting routes 3 in Fig. 8；
(4) emergency vehicles are kept straight on, western imported vehicle straight trip, such as intersecting routes 4 in Fig. 8；
When anxious vehicle drives into intersection from northing mouth, the larger collision course of four kinds of collision probabilities is obtained：
(1) emergency vehicles are kept straight on, western imported vehicle straight trip, such as intersecting routes 1 in Fig. 7；
(2) emergency vehicles are kept straight on, and western imported vehicle turns left, such as intersecting routes 2 in Fig. 7；
(3) emergency vehicles turn left, eastern imported vehicle straight trip, such as intersecting routes 3 in Fig. 8；
(4) emergency vehicles are kept straight on, eastern imported vehicle straight trip, such as intersecting routes 4 in Fig. 8；
When anxious vehicle drives into intersection from eastern import, the larger collision course of four kinds of collision probabilities is obtained：
(1) emergency vehicles are kept straight on, northern imported vehicle straight trip, such as intersecting routes 1 in Fig. 7；
(2) emergency vehicles are kept straight on, and northern imported vehicle turns left, such as intersecting routes 2 in Fig. 7；
(3) emergency vehicles turn left, southern imported vehicle straight trip, such as intersecting routes 3 in Fig. 8；
(4) emergency vehicles are kept straight on, southern imported vehicle straight trip, such as intersecting routes 4 in Fig. 8；
When anxious vehicle drives into intersection from western import, the larger collision course of four kinds of collision probabilities is obtained：
(1) emergency vehicles are kept straight on, southern imported vehicle straight trip, such as intersecting routes 1 in Fig. 7；
(2) emergency vehicles are kept straight on, and southern imported vehicle turns left, such as intersecting routes 2 in Fig. 7；
(3) emergency vehicles turn left, northern imported vehicle straight trip, such as intersecting routes 3 in Fig. 8；
(4) emergency vehicles are kept straight on, northern imported vehicle straight trip, such as intersecting routes 4 in Fig. 8.
Other steps and parameter are same as the specific embodiment one.
Specific implementation mode three：The present embodiment is different from the first and the second embodiment in that：Root in the step 2 According to the route to conflict with emergency vehicles that step 1 determines, the installation site of RFID reader on the entrance driveway of intersection four is determined Detailed process be：
Each intersection relevant parameter is as shown in table 1.
1 intersection relevant parameter definition of table
The sensitive and reactive distance S for the vehicle that needs that Stop and give way on track corresponding with emergency vehicles collision course0For：
S0=V1·Δt
Wherein V1For normal vehicle travel speed, Δ t is the reaction time of driver, value 0.5s；
The braking distance S for the vehicle that needs that Stop and give way on track corresponding with emergency vehicles collision course1For：
Wherein a is safe acceleration when slowing down, value 2.8m/s2；
The vehicle safety that needs that Stop and give way on track corresponding with emergency vehicles collision course, which is decelerated to, stops the time used t0For：
t0=V1/a
Turning radius R1For：
R1=R0+L/2+S/2
Wherein R0For intersection corner kerb radius, L is lane width, and S is intersection width；
When emergency vehicles drive into intersection, emergency vehicles straight trip, when eastern imported vehicle is kept straight on from southing mouth：
S21+R0+ L/2+S/2=V2·(t0+Δt)
I.e.：S21=V2·(t0+Δt)-R0- L/2-S/2=V2·(t0+Δt)-R1
Wherein S21It keeps straight on for emergency vehicles, when eastern imported vehicle is kept straight on, distance of the RFID reader apart from stop line, V2For Emergency vehicles travel speed；
Similarly obtain emergency vehicles straight trip, when eastern imported vehicle turns left, distance S of the RFID reader apart from stop line22； Turn left to emergency vehicles, when western imported vehicle is kept straight on, distance S of the RFID reader apart from stop line23；It is straight to obtain emergency vehicles Row, when western imported vehicle is kept straight on, distance S of the RFID reader apart from stop line24；
Wherein S21＜ S22, S22＜ S23, S24＜ S23, therefore, when to make emergency vehicles pass through intersection there is enough safety Ensure, RFID reader is mounted on apart from stop line S23Position at road center dividing strip on；
Similarly RFID reader installation site on determining northern entrance driveway, eastern entrance driveway and western entrance driveway.
Other steps and parameter are the same as one or two specific embodiments.
Specific implementation mode four：Unlike one of present embodiment and specific implementation mode one to three：：The step 3 The middle route to conflict with emergency vehicles determined according to step 1, determines the installation site of warning lamp on the entrance driveway of intersection four Detailed process be：
When emergency vehicles drive into intersection, emergency vehicles straight trip, when eastern imported vehicle is kept straight on from southing mouth：
S11+R0+ L/2=S11+ AB=S0+S1
I.e.:S11=S0+S1-R0- L/2=S0+S1-AB
Wherein S11It keeps straight on for emergency vehicles, when eastern imported vehicle is kept straight on, distance of the warning lamp apart from stop line；
Similarly obtain emergency vehicles straight trip, when eastern imported vehicle turns left, distance S of the RFID reader apart from stop line12； Turn left to emergency vehicles, when western imported vehicle is kept straight on, distance S of the RFID reader apart from stop line13；It is straight to obtain emergency vehicles Row, when western imported vehicle is kept straight on, distance S of the RFID reader apart from stop line14；
Wherein S11＞ S12, S11＞ S13, S11＞ S14；There is enough safety when therefore, to make emergency vehicles pass through intersection Ensure, warning lamp should be mounted on apart from stop line S11Position at road center dividing strip on；
Similarly warning lamp installation site on determining northern entrance driveway, eastern entrance driveway and western entrance driveway；
The mounting height 2m to 2.5m of warning lamp.
The recognition reaction distance of high-frequency RF ID is more than 1m, and typical effect distance is 3-l0m, is asked in conjunction with system operation cost Topic, FRID readers and warning lamp are placed at road center dividing strip, i.e., the RFID reader of one intersection and There are four warning lamp is each.Device riding position plan view is as shown in Figure 9.
Other steps and parameter are identical as one of specific implementation mode one to three.
Specific implementation mode five：Unlike one of present embodiment and specific implementation mode one to four：The step 4 The installation site of LED changeable colours track direction board is specially on the entrance driveway of middle determining intersection four：
LED changeable colours track direction board is installed on above intersection parking line.According to《Road traffic signal lamp is arranged and peace Fill specification》, the mounting height of direction board is 5.5m to 7m；The mounting height 2m to 2.5m of warning lamp.
LED changeable colours track direction board is installed on above intersection parking line, and mounting height is 5.5m to 7m.
Other steps and parameter are identical as one of specific implementation mode one to four.
Beneficial effects of the present invention are verified using following embodiment：
Embodiment one：
Now by taking urban road intersection as an example, two two-way four-lane right-angled intersections are equipped with, the wide L=3.5m in track, have a lot of social connections S =20m, emergency vehicles maximum speed V2=70km/h can then obtain suggestion mounting distance, as shown in table 2.
2 facility of table and 'STOP' line ahead
(1) collision rate model foundation
As shown in Figure 10, the probability clashed in the case where emergency vehicles make a dash across the red light, vehicle point are calculated so that straight trip is collided as an example Also known as it is A vehicles and B vehicles.Conflict area inside intersection is red area.Now make following hypothesis：
(1) randomness that emergency vehicles and public vehicles occur is considered, for the sake of easy, it is assumed that their initial positions with it is each From conflict area apart from equal；
(2) when vehicle is close to intersection, speed is variation, and obeys and be uniformly distributed.
From above-mentioned hypothesis, the condition not clashed between A vehicles and B vehicles is：
(1) B vehicles have passed through when A vehicles reach conflict area, are denoted as event A.
(2) A vehicles have passed through when B vehicles reach conflict area, are denoted as event B.
It is described as with symbolic language：
Only 2 inequality are unsatisfactory for, then will be clashed, and event C is denoted as.I.e.：P (C)=1-P (A)-P (B) (3)
In formula:xA、xBRespectively vehicle is at a distance from conflict area；lA、lBThe respectively length of vehicle；wA、wBRespectively The width of vehicle；vA、vBIndicate that vehicle reaches the average speed of conflict area respectively.By hypothesis (2),
In formula:f(vA) it is vADensity function.So
Similarly, P (B) can be acquired, and then brings formula (3) into, acquires P (C).
(2) collision rate analysis is compared
Using above-mentioned model, calculates analysis and clash probability.
Assuming that lA=8m, lB=5m, xA=xB=10m, wA=wB=2.5m.
Under no early warning induction system： It substitutes into above-mentioned formula to calculate, obtain：P (A)=6.3%, P (B)=1.8%, P (C)= 91.9%.
In the case where there is early warning induction system： It substitutes into above-mentioned formula to calculate, obtain：P (A)=2.8%, P (B)=8.6%, P (C)=88.6%.Root According to driver's physical condition sample investigation, and consider nature factor, it is assumed that have 1.1% after installation early warning induction device Vehicle is not parking to give way, remaining vehicle parking gives way, and the probability to collide at this moment is only 88.6% × 1.1%= 0.98%, significantly reduce the accident rate that emergency vehicles make a dash across the red light.
The present invention can also have other various embodiments, without deviating from the spirit and substance of the present invention, this field Technical staff makes various corresponding change and deformations in accordance with the present invention, but these corresponding change and deformations should all belong to The protection domain of appended claims of the invention.

Claims (5)

  1. Traffic control method when 1. a kind of emergency vehicles intersection based on RFID technique is made a dash across the red light, it is characterised in that：It is described Traffic control method when emergency vehicles intersection is made a dash across the red light includes the following steps：
    Step 1：When emergency vehicles enter intersect oral erotism make a dash across the red light by when, determine the route that conflicts with emergency vehicles；
    Step 2：According to the route to conflict with emergency vehicles that step 1 determines, determine that RFID is read on the entrance driveway of intersection four Read the installation site of device；
    Step 3：According to the route to conflict with emergency vehicles that step 1 determines, warning lamp on the entrance driveway of intersection four is determined Installation site；
    Step 4：Determine the installation site of LED changeable colours track direction board on the entrance driveway of intersection four, the LED changeable colours The instruction graticule being arranged on the direction board of track is consistent with corresponding entrance driveway graticule, i.e. the graticule of the number of track-lines of entrance driveway and direction board Number is consistent, and direction is identical；
    Step 5：When RFID reader detects the electronic tag of emergency vehicles, and determines emergency vehicles place track, LED Direction board instruction graticule corresponding with track where emergency vehicles in changeable colour track becomes red, and the vehicle in front of emergency vehicles becomes Shift to other tracks；LED changeable colours track direction board graticule on track corresponding with the route of emergency vehicles conflict turns yellow, and answers The warning lamp flicker of entrance driveway where the route of anxious vehicle collision；Using vehicle forward direction as front, the vehicle in front of warning lamp Normally travel, the vehicle deceleration traveling at warning lamp rear, and Stop and give way before stop line；
    When the electronic tag of the emergency vehicles is detected by RFID reader or warning lamp and LED changeable colours track indicate again After board lights 25 seconds, warning lamp and LED changeable colours track direction board are automatically closed.
  2. Traffic control side when 2. a kind of emergency vehicles intersection based on RFID technique is made a dash across the red light according to claim 1 Method, it is characterised in that：In the step 1 when emergency vehicles enter intersect oral erotism make a dash across the red light by when, determine with emergency vehicles rush The detailed process of prominent route is：
    When anxious vehicle drives into intersection from southing mouth, four kinds of collision courses are obtained：
    (1) emergency vehicles are kept straight on, eastern imported vehicle straight trip；
    (2) emergency vehicles are kept straight on, and eastern imported vehicle turns left；
    (3) emergency vehicles turn left, western imported vehicle straight trip；
    (4) emergency vehicles are kept straight on, western imported vehicle straight trip；
    When anxious vehicle drives into intersection from northing mouth, four kinds of collision courses are obtained：
    (1) emergency vehicles are kept straight on, western imported vehicle straight trip；
    (2) emergency vehicles are kept straight on, and western imported vehicle turns left；
    (3) emergency vehicles turn left, eastern imported vehicle straight trip；
    (4) emergency vehicles are kept straight on, eastern imported vehicle straight trip；
    When anxious vehicle drives into intersection from eastern import, four kinds of collision courses are obtained：
    (1) emergency vehicles are kept straight on, northern imported vehicle straight trip；
    (2) emergency vehicles are kept straight on, and northern imported vehicle turns left；
    (3) emergency vehicles turn left, southern imported vehicle straight trip；
    (4) emergency vehicles are kept straight on, southern imported vehicle straight trip；
    When anxious vehicle drives into intersection from western import, four kinds of collision courses are obtained：
    (1) emergency vehicles are kept straight on, southern imported vehicle straight trip；
    (2) emergency vehicles are kept straight on, and southern imported vehicle turns left；
    (3) emergency vehicles turn left, northern imported vehicle straight trip；
    (4) emergency vehicles are kept straight on, northern imported vehicle straight trip.
  3. Traffic control when 3. a kind of emergency vehicles intersection based on RFID technique according to claim 1 or claim 2 is made a dash across the red light Method, it is characterised in that：The route to conflict with emergency vehicles determined according to step 1 in the step 2, determines intersection four The detailed process of the installation site of RFID reader is on a entrance driveway：
    The sensitive and reactive distance S for the vehicle that needs that Stop and give way on track corresponding with emergency vehicles collision course0For：
    S0=V1·Δt
    Wherein V1For normal vehicle travel speed, Δ t is the reaction time of driver；
    The braking distance S for the vehicle that needs that Stop and give way on track corresponding with emergency vehicles collision course1For：
    Wherein a is safe acceleration when slowing down；
    The vehicle safety that needs that Stop and give way on track corresponding with emergency vehicles collision course, which is decelerated to, stops time t used0For：
    t0=V1/a
    Turning radius R1For：
    R1=R0+L/2+S/2
    Wherein R0For intersection corner kerb radius, L is lane width, and S is intersection width；
    When emergency vehicles drive into intersection, emergency vehicles straight trip, when eastern imported vehicle is kept straight on from southing mouth：
    S21+R0+ L/2+S/2=V2·(t0+Δt)
    I.e.：S21=V2·(t0+Δt)-R0- L/2-S/2=V2·(t0+Δt)-R1
    Wherein S21It keeps straight on for emergency vehicles, when eastern imported vehicle is kept straight on, distance of the RFID reader apart from stop line, V2It is emergent Vehicle Speed；
    Similarly obtain emergency vehicles straight trip, when eastern imported vehicle turns left, distance S of the RFID reader apart from stop line22；It is answered Anxious vehicle turns left, when western imported vehicle is kept straight on, distance S of the RFID reader apart from stop line23；Obtain emergency vehicles straight trip, west When imported vehicle is kept straight on, distance S of the RFID reader apart from stop line24；
    Wherein S21＜ S22, S22＜ S23, S24＜ S23, RFID reader is mounted on apart from stop line S23Position at road in On central median；
    Similarly RFID reader installation site on determining northern entrance driveway, eastern entrance driveway and western entrance driveway.
  4. Traffic control side when 4. a kind of emergency vehicles intersection based on RFID technique is made a dash across the red light according to claim 3 Method, it is characterised in that：The route to conflict with emergency vehicles determined according to step 1 in the step 3, determines intersection four The detailed process of the installation site of warning lamp is on entrance driveway：
    When emergency vehicles drive into intersection, emergency vehicles straight trip, when eastern imported vehicle is kept straight on from southing mouth：
    S11+R0+ L/2=S0+S1
    I.e.：S11=S0+S1-R0-L/2
    Wherein S11It keeps straight on for emergency vehicles, when eastern imported vehicle is kept straight on, distance of the warning lamp apart from stop line；
    Similarly obtain emergency vehicles straight trip, when eastern imported vehicle turns left, distance S of the RFID reader apart from stop line12；It is answered Anxious vehicle turns left, when western imported vehicle is kept straight on, distance S of the RFID reader apart from stop line13；Obtain emergency vehicles straight trip, west When imported vehicle is kept straight on, distance S of the RFID reader apart from stop line14；
    Wherein S11＞ S12, S11＞ S13, S11＞ S14；Warning lamp is mounted on apart from stop line S11Position at road center point Every taking；
    Similarly warning lamp installation site on determining northern entrance driveway, eastern entrance driveway and western entrance driveway；
    The mounting height 2m to 2.5m of warning lamp.
  5. Traffic control side when 5. a kind of emergency vehicles intersection based on RFID technique is made a dash across the red light according to claim 4 Method, it is characterised in that：The installation site of LED changeable colours track direction board on the entrance driveway of intersection four is determined in the step 4 Specially：
    LED changeable colours track direction board is installed on above intersection parking line, and mounting height is 5.5m to 7m.
CN201810739286.3A 2018-07-06 2018-07-06 Traffic control method for red light running at emergency vehicle intersection based on RFID technology Expired - Fee Related CN108648477B (en)

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