CN116844355A - Traffic control method for improving traffic efficiency of emergency vehicles - Google Patents
Traffic control method for improving traffic efficiency of emergency vehicles Download PDFInfo
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- CN116844355A CN116844355A CN202311117842.0A CN202311117842A CN116844355A CN 116844355 A CN116844355 A CN 116844355A CN 202311117842 A CN202311117842 A CN 202311117842A CN 116844355 A CN116844355 A CN 116844355A
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- visible light
- light communication
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- 238000000034 method Methods 0.000 title claims abstract description 20
- 238000004891 communication Methods 0.000 claims abstract description 51
- 239000008280 blood Substances 0.000 claims description 3
- 210000004369 blood Anatomy 0.000 claims description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 230000001404 mediated effect Effects 0.000 description 2
- 230000003287 optical effect Effects 0.000 description 2
- 230000000007 visual effect Effects 0.000 description 2
- 206010039203 Road traffic accident Diseases 0.000 description 1
- 241000269400 Sirenidae Species 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
Classifications
-
- 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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- G—PHYSICS
- G08—SIGNALLING
- G08G—TRAFFIC CONTROL SYSTEMS
- G08G1/00—Traffic control systems for road vehicles
- G08G1/07—Controlling traffic signals
- G08G1/081—Plural intersections under common control
-
- G—PHYSICS
- G08—SIGNALLING
- G08G—TRAFFIC CONTROL SYSTEMS
- G08G1/00—Traffic control systems for road vehicles
- G08G1/09—Arrangements for giving variable traffic instructions
- G08G1/0962—Arrangements for giving variable traffic instructions having an indicator mounted inside the vehicle, e.g. giving voice messages
- G08G1/0965—Arrangements for giving variable traffic instructions having an indicator mounted inside the vehicle, e.g. giving voice messages responding to signals from another vehicle, e.g. emergency vehicle
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/11—Arrangements specific to free-space transmission, i.e. transmission through air or vacuum
- H04B10/114—Indoor or close-range type systems
- H04B10/116—Visible light communication
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Electromagnetism (AREA)
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Traffic Control Systems (AREA)
Abstract
The invention discloses a traffic control method for improving the passing efficiency of emergency vehicles, which relates to the field of traffic control, and comprises the following steps that firstly, all vehicles and intersection signal lamps are provided with visible light communication devices; when the emergency vehicle gets on the road, the navigation information is sent to the front non-emergency vehicle and the intersection signal lamp through the equipment, and the latter confirms the traveling direction of the emergency vehicle and transmits the traveling direction to the non-emergency vehicle of the next road; the non-emergency vehicle that received the information will preferentially avoid this direction of travel. Meanwhile, the signal lamp adjusts the light state according to the received navigation information: if the current state is all green, then hold; if a red light exists, the vehicle is fast forwarded to full green and kept until the emergency vehicle is driven away; and finally, switching the signal lamp according to the original rule according to the difference value of the duration time of the actual green light and the original green light. The traffic flow and signal lamp state intelligent control system has the advantage that the traffic flow and signal lamp state intelligent control system improves the traffic efficiency of emergency vehicles.
Description
Technical Field
The present invention relates to the field of traffic control, and more particularly, to a traffic control method for improving the passing efficiency of emergency vehicles.
Background
In existing traffic systems, emergency vehicles such as ambulances, fire-fighting vehicles, police vehicles, etc. may encounter traffic congestion problems in crowded urban traffic, although they have the right to pass preferentially. In many cases, the driver of the emergency vehicle has to rely on sirens and lights to alert the vehicle ahead to the way, however this approach does not guarantee that each vehicle will understand and respond to these cues in a timely and accurate manner, and especially in the case of a traffic jam, it becomes difficult for other vehicles to avoid lane changes due to poor forward vehicle traffic efficiency. In addition, in the case where the signal lamp is a red light, an emergency vehicle is sometimes liable to accident if passing through the red light.
In addition, existing traffic light systems typically switch based on a fixed schedule, without regard to the presence of emergency vehicles. This means that even if an emergency vehicle needs to pass, the signal lamp may still display a red light, thereby impeding the passing of the emergency vehicle. Meanwhile, since the non-emergency vehicle cannot know the travel route of the emergency vehicle in advance, the situation that the non-emergency vehicle collides with the emergency vehicle is likely to occur, traffic confusion is caused, and emergency rescue is delayed.
Therefore, there is an urgent need in the art for a traffic control method capable of improving the passing efficiency of emergency vehicles, which ensures smooth passing of emergency vehicles by controlling the state of traffic lights and non-emergency vehicles in real time.
Disclosure of Invention
The invention aims to provide a traffic control method for improving the passing efficiency of emergency vehicles so as to solve the problems in the background art.
In order to achieve the above purpose, the invention adopts the following technical scheme:
a traffic control method for improving the efficiency of emergency vehicle traffic, comprising the steps of:
s1: providing a visible light communication device on all vehicles including an emergency vehicle;
a visible light communication device is arranged on a signal lamp of each intersection;
s2: when an emergency vehicle enters a road, the emergency vehicle sends vehicle navigation information to a front non-emergency vehicle and a signal lamp of a front intersection through visible light communication; after the signal lamp receives the navigation information, confirming the advancing direction of the emergency vehicle at the intersection, and transmitting the navigation information of the emergency vehicle to a non-emergency vehicle which runs on the next road where the vehicle is going to enter;
s3: all non-emergency vehicles which acquire the navigation information of the emergency vehicle preferentially avoid a lane corresponding to the advancing direction according to the advancing direction of the emergency vehicle at the front intersection of the road where the non-emergency vehicle is positioned;
s4: when the emergency vehicle enters a road, the signal lamp judges the signal lamp state of the emergency vehicle when the signal lamp judges that the signal lamp receives navigation information:
1) If the signal lamp state is all green, keeping the current state unchanged; when an emergency vehicle drives away from the road, calculating the actual duration time t1 and the original duration time t2 of the signal lamp in a full green light state, and if t1 is less than t2, starting to switch the signal lamp at the intersection according to the original rule after the duration time t2-t 1;
if t1 is more than or equal to t2, switching the intersection signal lamp according to the original rule immediately, or switching at the original period moment corresponding to the next switching action;
2) If the red light exists in the signal light state, calculating the time difference delta t from the moment to the all-green light state, fast forwarding all signal light states of the intersection by the residual time delta t, and keeping the all-green light state; when an emergency vehicle drives away from the road, calculating the actual duration time t1 and the original duration time t2 of the signal lamp in a full green light state, and if t1 is less than t2, starting to switch the signal lamp at the intersection according to the original rule after the duration time t2-t 1; if t1 is more than or equal to t2, the intersection signal lamp is switched immediately according to the original rule, or is switched at the original period time corresponding to the next switching action.
The travelling direction of the emergency vehicle at the intersection at least comprises the following steps: left turn, straight line, and right turn.
In some embodiments:
the visible light communication device on the emergency vehicle comprises at least a transmitter;
the visible light communication device on the non-emergency vehicle comprises at least a receiver;
the visible light communication device on the signal lamp comprises a transmitter and a receiver.
In some embodiments: the transmitter on the emergency vehicle is integrated with a headlight of the emergency vehicle;
the receiver on the non-emergency vehicle is integrated with the taillight of the non-emergency vehicle.
In some embodiments, the signal lamp is connected with the visible light communication device through a control unit, and the control unit is used for acquiring a signal output by the visible light communication device and controlling the state of the signal lamp.
The emergency vehicle includes at least: ambulances, fire-fighting vehicles, police vehicles, engineering rescue vehicles and blood transport vehicles.
In some embodiments, communication between the emergency vehicle and the signal lights is mediated by one or more visible light communication devices. Different signal lamps belonging to two intersections are communicated with each other through one or more visible light communication devices as intermediaries. Wherein:
in some embodiments, the intermediary visible light communication device is a visible light communication device disposed on a non-emergency vehicle.
In other embodiments, the intermediary visual light communication device is a visual light communication device integrated with a street lamp.
Compared with the prior art, the invention has the advantages that the visible light communication device between the emergency vehicle and the non-emergency vehicle as well as between the signal lamps can realize high-efficiency and real-time information exchange, and compared with the connection of the Internet, the communication stability and efficiency are higher under the specific scene due to higher local effect of the optical communication. In the present invention, when an emergency vehicle enters a road, it can transmit vehicle navigation information to a non-emergency vehicle in front and a traffic light through a visible light communication device. Once the signal lamp receives the information, the state of the signal lamp can be adjusted in time so as to ensure smooth passing of emergency vehicles. Meanwhile, after the non-emergency vehicle acquires the information, the non-emergency vehicle can make an avoidance action in advance according to the advancing direction of the emergency vehicle, so that traffic jam and possible traffic accidents are avoided, and the passing efficiency of the emergency vehicle is improved. When the signal lamp receives the navigation information of the emergency vehicle, the signal lamp can also transmit the information, so that the non-emergency vehicle on the next road where the emergency vehicle is going to enter can know the information in advance, and the non-emergency vehicle can avoid the information in advance. In the traffic light control, the invention also considers that the green light of the road corresponding to the emergency vehicle is fully opened, so that other non-emergency vehicles can rapidly pass, thereby leaving a passing space for the emergency vehicle, and as the other non-emergency vehicles avoid and select the passing road different from the emergency vehicle, the number of vehicles entering the next road corresponding to the emergency vehicle can be reduced, and the communication efficiency of the emergency vehicle is further increased. The invention also considers how to perform subsequent control after the signal lamp is changed based on the emergency vehicle, so that the traffic light is recovered to the normal period, and subsequent traffic disorder caused by the traffic light is avoided as much as possible.
Drawings
FIG. 1 is a schematic flow chart of the method of the present invention.
Detailed Description
The following describes specific embodiments of the present invention with reference to the drawings.
A general flow chart of the invention is shown in fig. 1.
The invention discloses a traffic control method for improving the passing efficiency of emergency vehicles, which comprises the following steps:
s1: providing a visible light communication device on all vehicles including an emergency vehicle;
a visible light communication device is arranged on a signal lamp of each intersection; visible light communication is a technique for information transmission using visible light, similar to Wi-Fi, but uses optical signals instead of radio waves. Thus, it can operate in a lighting system and its data transmission rate is also faster because the frequency of visible light is higher than that of radio waves;
s2: when an emergency vehicle enters a road, the emergency vehicle sends vehicle navigation information to a front non-emergency vehicle and a signal lamp of a front intersection through visible light communication; after the signal lamp receives the navigation information, confirming the advancing direction of the emergency vehicle at the intersection, and transmitting the navigation information of the emergency vehicle to a non-emergency vehicle which runs on the next road where the vehicle is going to enter;
s3: all non-emergency vehicles which acquire the navigation information of the emergency vehicle preferentially avoid a lane corresponding to the advancing direction according to the advancing direction of the emergency vehicle at the front intersection of the road where the non-emergency vehicle is positioned;
s4: when the emergency vehicle enters a road, the signal lamp judges the signal lamp state of the emergency vehicle when the signal lamp judges that the signal lamp receives navigation information:
1) If the signal lamp state is all green, keeping the current state unchanged; when an emergency vehicle drives away from the road, calculating the actual duration time t1 and the original duration time t2 of the signal lamp in a full green light state, and if t1 is less than t2, starting to switch the signal lamp at the intersection according to the original rule after the duration time t2-t 1;
if t1 is more than or equal to t2, switching the intersection signal lamp according to the original rule immediately, or switching at the original period moment corresponding to the next switching action;
2) If the red light exists in the signal light state, calculating the time difference delta t from the moment to the all-green light state, fast forwarding all signal light states of the intersection by the residual time delta t, and keeping the all-green light state; when an emergency vehicle drives away from the road, calculating the actual duration time t1 and the original duration time t2 of the signal lamp in a full green light state, and if t1 is less than t2, starting to switch the signal lamp at the intersection according to the original rule after the duration time t2-t 1; if t1 is more than or equal to t2, the intersection signal lamp is switched immediately according to the original rule, or is switched at the original period time corresponding to the next switching action.
The explanation of the "the next predetermined cycle time corresponding to the switching operation" is as follows: if the emergency vehicle is not influenced, the switching action from the all green light state to the next state may be performed at Beijing time T1, T2 and T3 … … according to the original signal lamp period, and if the moment when the emergency vehicle leaves is between T1 and T2, the moment of the original period corresponding to the next switching action is T2. This is done because in some urban traffic light systems, traffic lights at different intersections are interrelated, so in order to ensure coordination of the traffic lights at different intersections, the traffic lights at the intersections need to be adjusted to be in synchronization with the original traffic lights. The emergency vehicle is ensured to be in a traffic light state to a full green light state when being on the road, so that the emergency vehicle and the non-emergency vehicle can pass through quickly, wherein the quick passing of the non-emergency vehicle can ensure that a space is reserved for the emergency vehicle. Further, since the yellow light operation between traffic lights is default, the yellow light operation is not described in the present invention, and the yellow light may be present as a buffer by default in the present invention.
In addition, the signal lamp state is considered to be fast-forwarded or adjusted integrally, instead of independently adjusting the signal lamp states of the emergency vehicle in the driving direction, because the signal lamps in different directions in one intersection are mutually related, for example, a green lamp in one direction generally means a red lamp in the other direction, and is more complex when left-turning and right-turning lamps exist, therefore, the invention translates all signal lamp states of one intersection, and can ensure that the association relationship is unchanged.
The traveling direction of the emergency vehicle at the intersection at least comprises: left turn, straight line, and right turn. In some special cases, this also corresponds to the case of multiple intersections.
In some embodiments, the visible light communication device on the emergency vehicle may include a transmitter; the transmitter on the emergency vehicle is integrated with the headlight of the emergency vehicle;
the visible light communication device on the non-emergency vehicle may be equipped with a receiver; the receiver is integrated with a taillight of a non-emergency vehicle;
the visible light communication device on the signal lamp comprises a transmitter and a receiver.
In some embodiments, communication between the emergency vehicle and the signal lights is mediated by one or more visible light communication devices; different signal lamps belonging to two intersections are communicated with each other through one or more visible light communication devices as intermediaries. If the intervening visible light communication device is a visible light communication device provided on a non-emergency vehicle, the non-emergency vehicle is equipped with both a transmitter and a receiver. In other embodiments, the intermediate visible light communication device may also be a visible light communication device integrated with a street lamp.
In some embodiments, the signal lamp is connected with the visible light communication device through a control unit, and the control unit is used for acquiring a signal output by the visible light communication device and controlling the state of the signal lamp.
The emergency vehicle may include: ambulances, fire-fighting vehicles, police vehicles, engineering rescue vehicles and blood transport vehicles.
The foregoing is only a preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art, who is within the scope of the present invention, should be covered by the protection scope of the present invention by making equivalents and modifications to the technical solution and the inventive concept thereof.
Claims (10)
1. A traffic control method for improving the efficiency of emergency vehicle traffic, comprising the steps of:
s1: providing a visible light communication device on all vehicles including an emergency vehicle;
a visible light communication device is arranged on a signal lamp of each intersection;
s2: when an emergency vehicle enters a road, the emergency vehicle sends vehicle navigation information to a front non-emergency vehicle and a signal lamp of a front intersection through visible light communication; after the signal lamp receives the navigation information, confirming the advancing direction of the emergency vehicle at the intersection, and transmitting the navigation information of the emergency vehicle to a non-emergency vehicle which runs on the next road where the vehicle is going to enter;
s3: all non-emergency vehicles which acquire the navigation information of the emergency vehicle preferentially avoid a lane corresponding to the advancing direction according to the advancing direction of the emergency vehicle at the front intersection of the road where the non-emergency vehicle is positioned;
s4: when the emergency vehicle enters a road, the signal lamp judges the signal lamp state of the emergency vehicle when the signal lamp judges that the signal lamp receives navigation information:
1) If the signal lamp state is all green, keeping the current state unchanged; when an emergency vehicle drives away from the road, calculating the actual duration time t1 and the original duration time t2 of the signal lamp in a full green light state, and if t1 is less than t2, starting to switch the signal lamp at the intersection according to the original rule after the duration time t2-t 1;
if t1 is more than or equal to t2, switching the intersection signal lamp according to the original rule immediately, or switching at the original period moment corresponding to the next switching action;
2) If the red light exists in the signal light state, calculating the time difference delta t from the moment to the all-green light state, fast forwarding all signal light states of the intersection by the residual time delta t, and keeping the all-green light state; when an emergency vehicle drives away from the road, calculating the actual duration time t1 and the original duration time t2 of the signal lamp in a full green light state, and if t1 is less than t2, starting to switch the signal lamp at the intersection according to the original rule after the duration time t2-t 1; if t1 is more than or equal to t2, the intersection signal lamp is switched immediately according to the original rule, or is switched at the original period time corresponding to the next switching action.
2. The traffic control method for improving the passing efficiency of an emergency vehicle according to claim 1, wherein the traveling direction of the emergency vehicle at an intersection at least includes: left turn, straight line, and right turn.
3. The traffic control method for improving the passing efficiency of emergency vehicles according to claim 1, wherein:
the visible light communication device on the emergency vehicle comprises at least a transmitter;
the visible light communication device on the non-emergency vehicle comprises at least a receiver;
the visible light communication device on the signal lamp comprises a transmitter and a receiver.
4. A traffic control method for improving the efficiency of emergency vehicle traffic according to claim 3, wherein the transmitter on the emergency vehicle is integrated with the headlights of the emergency vehicle;
the receiver on the non-emergency vehicle is integrated with the taillight of the non-emergency vehicle.
5. The traffic control method for improving the passing efficiency of emergency vehicles according to claim 1, wherein the signal lamp is connected with the visible light communication device through a control unit, and the control unit is used for acquiring a signal output by the visible light communication device and controlling the state of the signal lamp.
6. The traffic control method for improving the passing efficiency of an emergency vehicle according to claim 1, wherein the emergency vehicle comprises: ambulances, fire-fighting vehicles, police vehicles, engineering rescue vehicles and blood transport vehicles.
7. The traffic control method for improving the efficiency of emergency vehicle traffic according to claim 1, wherein the emergency vehicle and the signal lamp communicate with each other as an intermediary through one or more visible light communication devices.
8. The traffic control method for improving the passing efficiency of emergency vehicles according to claim 1, wherein different signal lights belonging to two intersections are communicated as an intermediary through one or more visible light communication devices.
9. The traffic control method for improving the passing efficiency of emergency vehicles according to claim 7 or 8, wherein the mediating visible light communication device is a visible light communication device provided on a non-emergency vehicle.
10. The traffic control method for improving the passing efficiency of emergency vehicles according to claim 7 or 8, wherein the visible light communication device as an intermediary is a visible light communication device integrated in a street lamp.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202311117842.0A CN116844355B (en) | 2023-09-01 | 2023-09-01 | Traffic control method for improving traffic efficiency of emergency vehicles |
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| CN202311117842.0A CN116844355B (en) | 2023-09-01 | 2023-09-01 | Traffic control method for improving traffic efficiency of emergency vehicles |
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| CN116844355B (en) | 2024-01-23 |
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