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5G, opening a new era of intelligent transportation

   Release date: 2022-06-29     Hits: 4106    Comment: 0    
Note:   The world of communication is evolving rapidly,and almost 10 years is an era.From 2G in the 1990s to 4G in 2010,the
   The world of communication is evolving rapidly,and almost 10 years is an era.From 2G in the 1990s to 4G in 2010,the rapid development of communication technology has brought earth-shaking changes to our lives.
 
  In 2019,as the first year of China's 5G commercialization,both countries,enterprises and users have maintained a high degree of attention to 5G.On June 6th,5G commercial license was officially issued,and 5G construction entered the fast lane.At present,several provinces have successively introduced relevant policies and measures,and actively laid out 5G development.Among them,the transportation industry has become one of the key layout industries.
 
  How does 5G technology empower the field of rail transit?How to better promote the development of smart transportation and smart cities?With a series of questions,we interviewed Professor Ai Bo,executive deputy director of the State Key Laboratory of Rail Transit Control and Safety of Beijing Jiaotong University.
 
  Professor Ai Bo has long been engaged in the research on the theory and technology of broadband mobile communication and railway-specific mobile communication.He has made a series of innovative theoretical research achievements in three aspects:new phenomenon and mechanism of radio wave propagation in complex scenes of high-speed railway,channel measurement and modeling,and key technologies of reliable transmission,which have attracted the attention of peers at home and abroad.He has adopted 18 standards/proposals by ITU,International Standards Organization 3GPP,IEEE Standards Organization and European Science and Technology COST Organization,and participated in the formulation of 4 national railway industry standards.He is an expert in the field of rail mobile communication.Through his talk,an expected era of intelligent rail transit is in sight!
 
  5G:Opening a new chapter in the Internet of Everything
 
  Recently,a short film of Japan's Ministry of Internal Affairs and Communications,The World Connected by 5G,has attracted a lot of attention.Various new technologies such as medium and high quality VR live broadcast,unmanned driving,unmanned automatic agriculture,self-service shops,real-time translation,telemedicine services,and 3D imaging"real-life"remote video chat are widely used,and the 5G era depicted by them seems not far away from us.
 
  "How can 5G technology be used in the field of rail transit?We must first understand the communication technology itself.The so-called 5G,also known as the fifth generation mobile communication,is an important mobile communication network for China's future development and construction."
 
  From 1G to 4G,the core of mobile communication is interpersonal communication,and personal communication is the core business of mobile communication.However,5G communication is not just communication between people.With the introduction of Internet of Things,industrial automation,unmanned driving and other services,communication has shifted from people to people,things to things,and machines to machines.
 
  The international standardization organization 3GPP defines three scenarios of 5G."Among them,eMBB refers to high-traffic mobile broadband services such as 3D/ultra-high-definition video,mMTC refers to large-scale Internet of Things services,and URLLC refers to services such as unmanned driving and industrial automation that require low latency and high reliability connection."From these three scenarios,5G technology has higher performance.
 
  Among them,the 5G that most of us understand is actually just the eMBB scenario.It faces the growth of mobile Internet traffic,that is,the familiar 5G mobile phone should have the function of fast downloading and watching ultra-clear video with high data rate,but this is only the tip of the iceberg in the 5G market.
 
  Main features of 5G
 
  High speed rate
 
  Compared with 4G,the first problem to be solved by 5G is high data transmission rate.When the network speed is improved,the user experience and feeling will be greatly improved.only when the network can face VR/ultra-high-definition services,can it be unrestricted,and services with high speed requirements can be widely promoted and used.Therefore,the first feature of 5G defines the improvement of data speed.The 5G acceleration of downloading a high-definition movie every second provides opportunities and possibilities for future businesses with high data rate requirements.
 
  low power consumption
 
  To support large-scale IoT applications,5G must have the requirement of power consumption.In recent years,wearable products have developed to some extent,but they have encountered many bottlenecks,and the biggest bottleneck is the poor experience.Take smart watches as an example.You need to charge them every day or even half a day.All IoT products need communication and energy.Although communication can be realized by various means today,the energy supply of mobile terminals can only rely on batteries.If the communication process consumes a lot of energy,it will be difficult for IoT products to be widely accepted by users.
 
  If the power consumption can be reduced and most IoT products can be charged once a week or even once a month,the user experience can be greatly improved and the rapid popularization of IoT products can be promoted.
 
  High reliability and low delay
 
  A new scenario of 5G is the highly reliable connection of unmanned driving and industrial automation.The time delay of 140ms is acceptable for people to exchange information,but it is unacceptable if it is used for unmanned driving and industrial automation.The minimum requirement for 5G delay is 1ms,or even lower,which puts severe demands on the network.And 5G is the inevitable requirement of these new applications.
 
  Driverless cars need to be interconnected between the central control center and cars,and cars should also be interconnected.In high-speed operations,a brake needs to instantly send information to the car to react.In about 100 milliseconds,the car will rush out of dozens of meters,which requires the shortest time delay to send safety control information to the car for braking and car control reaction.
 
  In order to meet the requirements of high reliability and low latency,edge computing technology is adopted by 5G network architecture.
 
  The so-called edge computing refers to an open platform that integrates the core capabilities of network,computing,storage and application on the side close to the object or data source,and provides the nearest service nearby.Its application program is launched on the edge side,which produces a faster response to network services and meets the basic needs of the industry in real-time business,application intelligence,security and privacy protection.
 
  Ultra-large number of network terminals
 
  In addition to the above three main features,5G technology also has the advantage of a large number of terminals in the network.In the traditional communication,the terminal is very limited.In the fixed telephone era,the telephone is defined by the crowd.In the era of mobile phones,the number of terminals has exploded,and mobile phones are defined according to individual applications.In the 5G era,terminals are not defined by people,because each person and each family may have several terminals.
 
  In 2018,China's mobile terminal users have reached 1.4 billion,of which mobile phones are the main ones.The vision of the communications industry for 5G is that it can support 1 million mobile terminals per square kilometer.In the future,the terminals connected to the network will not only be our mobile phones today,but also more strange products.The advent of 5G has accelerated the vision of"smart city"and"smart life",and its characteristics make it possible to"change society".
 
  From the commercialization of 4G in 2013 to the trial commercialization of 5G in 2019,in just six years,the pages of 4G in the history of human mobile internet are about to turn over,and an imaginative and highly anticipated era is coming.5G network will write a new chapter of the Internet of Everything!
 
  "5G+Traffic":Singing the Main Theme of Smart Travel
 
  Often talking about 5G changing society,in fact,5G is an intellectual society,because it will drive innovation in various fields,vertical industries and application scenarios.
 
  Transportation is the basic,leading,strategic and important service industry of the national economy.Under the background of digital and intelligent industry,new intelligent transportation services are constantly emerging,smart driving is developing rapidly,and the demand for smart road construction is urgent.
 
  According to the"13th Five-Year Plan for the Development of Modern Comprehensive Transportation System",by 2020,some regions and fields will take the lead in basically realizing the modernization of transportation,and realize 100%digitization of basic elements of transportation information.
 
  Therefore,firmly grasping the"golden period"of transportation development,building a new generation of national transportation control network,and providing safe,reliable,convenient,smooth,economical,efficient,green,low-carbon,intelligent and networked transportation that people are satisfied with is one of the important tasks of building a transportation power at present.
 
  At Yunqi Conference in 2019,Sun Yafu,vice president of Qianfang Technology Research Institute,also said:"'5G+traffic'makes the connection between cars and people,cars and roads easier and easier."
 
  Indeed,5G technology has inserted"wings"into the development of the transportation industry,and promoted the rapid progress of intelligent transportation.
 
  On August 31st,the White Paper on 5G Application Technology of Integrated Rail Transit,jointly edited by Professor Zhong Zhang of Beijing Jiaotong University,Professor Ai Bo of Beijing Jiaotong University,Vice President of ZTE Lu Ping and General Manager Li Xinzhang of Beijing Branch of China Mobile Company,was officially released,and the application of 5G technology in integrated rail transit was comprehensively and deeply discussed.
 
  What is an intelligent railway?
 
  Professor Ai Bo believes:"In addition to intelligent infrastructure,there should also be deep interconnection.In addition,we should make use of big data collection,fusion,processing technology and mining technology to realize deep intelligent processing,so as to realize intelligent management and decision-making.The application of intelligent railway includes 5G intelligent station,5G intelligent grouping,8K video surveillance and monitoring,and 5G service by car."
 
  5G Communication Technology Helps Rail Transit
 
  From a comprehensive analysis,5G application scenarios in rail transit mainly include high-traffic mobile broadband services such as 3D/ultra-high-definition video,large-scale Internet of Things services related to operation and maintenance,fully automatic driving automation services and other scenarios that require low latency and high reliability connection.
 
  It can be divided into several categories,such as train operation,operation and maintenance,passenger travel,emergency and disaster prevention.
 
  Train operation oriented
 
  1.Narrow-band/wide-band visual voice communication:realize voice dispatching communication and broadcast communication between the train and the ground.
 
  2.Safe and reliable medium and low speed data:mainly refers to the transmission of train operation control system data,train control management data and text data in case of emergency,which requires high time delay and needs to give priority to data bandwidth to ensure the safe operation of trains.
 
  3.Ultra-high-definition video stream:mainly the video surveillance image of the train upstream and the streaming media broadcast of the control center downstream.
 
  4.3D Visualized driving environment VR:Visualize and control the train running track.
 
  Operation and maintenance oriented
 
  There are many facilities that need to be maintained in rail transit,and they are distributed along the railway line,with a wide range of points and a huge maintenance workload.IoT technology is used to collect the status data of various electromechanical systems and public works systems.
 
  After the 5G network access is transmitted back to the professional maintenance personnel,it can change the rail transit from passive maintenance to intelligent supervision,improve the maintenance efficiency of the whole rail transit system and strengthen the security of the system.
 
  Passenger-oriented travel
 
  Intelligent passenger travel is the development trend.Access to passengers through 5G technology can realize ticket purchase in rail transit network,real-time search for information of vehicle arrival/departure stations,congestion at stations,positioning of commercial outlets in rail transit,etc.,which can provide reference for passengers'travel and improve the service level and comfort of rail transit.
 
  Recently,Guotie Jixun announced that it will jointly explore a new mode of high-speed rail communication operation on"5G"with China Mobile,which is not only an important step to build a"smart railway"but also a necessary step to realize the development of intelligent services.With the help of"5G",it can not only further optimize its own service quality,but also enhance the expansion of service space and enhance the beautiful experience of passengers'travel.
 
  Looking at the development of railway in recent years,intelligent integration has become an important force to greatly improve the service quality of railway.For example,"Smart+"brings new travel experience to passengers from many angles,such as mobile APP ticket purchase,face-brushing pit stop,high-speed rail meal reservation and e-ticket.It must be said that the integration of 5G and high-speed rail will be an important measure to improve the soft power of high-speed rail service.At present,the daily coverage of high-speed rail WiFi is about 500,000,and the overall coverage exceeds 190 million.This data will continue to increase in the future,and the service of passengers will be better.
 
  The introduction of 5G edge computing,network slicing,CDN acceleration and other technologies into the high-speed rail not only solves the network delay and signal problems that often occur on the high-speed rail,but also makes it more exciting that this project will be tested on the Guangzhou-Shenzhen-Hong Kong high-speed rail this year and put into practical use as soon as next year.At that time,passengers can enjoy the extremely fast experience of 5G network for free.Whether surfing Tik Tok,watching videos or playing games,the network speed will be 10 times higher than that of 4G!It can be said that 5G technology will promote China's transportation to"informatization and intelligence",which will bring great changes to the experience and quality of people's livelihood.
 
  Emergency disaster prevention oriented
 
  Urban rail transit trains have high departure density and large passenger flow,especially in case of emergency in full-automatic driving mode,the live broadcast of the situation can be realized by 5G technology,so as to improve the efficiency of emergency disaster prevention treatment and the pertinence of decision-making.
 
  1.Passenger flow monitoring in subway stations and halls:In order to ensure passengers'personal safety,enhance passengers'ride experience and avoid traffic paralysis caused by a large backlog of passenger flow,the subway passenger transport security department needs to pay real-time attention to the characteristics of crowd flow distribution in key areas such as subway stations,stations and halls,transfer passages,etc.Through the crowd heat map of the whole area in the subway station,it can intuitively show the crowd flow distribution in each area,and provide decision-making support for security and passenger grooming in subway operation.
 
  2.Analysis of transfer passenger flow in subway stations:subway transfer stations are generally the stations with the densest passengers and the largest traffic flow in subway lines.Statistical analysis is made for transfer passenger flow in subway transfer stations.For example,according to the number of people who transfer from Line A to Line B,it can be used as a reference to avoid traffic paralysis caused by a large backlog of passenger flow by adjusting departure frequency and increasing capacity for subway operation,and play a role in evacuation and diversion.
 
  3.Monitoring of passenger flow in and out of subway stations:There are many people coming in and out of subway stations during rush hour or in commercial and scenic spots,so the subway passenger security department needs to pay real-time attention to the passenger flow in and out of the station,so as to take emergency plans in time.Through real-time passenger flow statistics,the passenger security department can grasp the information of passenger flow in and out of subway stations in time,and give early warning according to the passenger flow growth trend,so as to guide the capacity evaluation and efficient operation of subway lines.
 
  Problems existing in the application of 5G communication technology
 
  Although the application of 5G communication technology has brought revolution and development to rail transit,the application of 5G technology is not comprehensive at present.Therefore,there will be many problems in the application process.First of all,the biggest feature of D2D communication used in 5G communication is to reduce interference,save resources and improve transmission efficiency.However,what kind of sharing method should be adopted in the process of sharing resources in cellular communication,and how to improve its reliability and security is an urgent problem to be solved.Moreover,at present,the leaky cable used in rail transit does not support 5G,and an appropriate wireless coverage method should be adopted according to the frequency.The second is the interface standard.based on the analysis of application scenarios in rail transit,various business applications have corresponding interfaces with 5G systems,and it is necessary to customize the relevant protocol interfaces for standardization.Third,network compatibility.For 5G applications in rail transit,the compatibility and matching of existing networks should be considered,such as interconnection with TETRA system,LTE system and WLAN system to improve resource utilization.
 
  The 5G technology,which is in the development stage,should improve the applicability and extensibility of the technology,ensure that the system is reformed and upgraded on the basis of the existing 4G communication,and when the 5G network has an emergency,it can be transferred to other devices to maintain the communication,so as to keep the running safety of trains,improve the safety level of communication technology and promote the effective utilization of communication resources.
 
  Nowadays,5G technology is regarded as the most forward-looking technology in the next few years,and it has a revolutionary subversive role for all walks of life.5G will driveDigital transformation of the whole society,because 5G will give the industry new skills,realize industrial integration and change the society.Especially with the rise of smart cities,5G technology will promote the rapid development of smart city construction.As a part of a smart city,intelligent transportation will also benefit from 5G.
 
  To promote the 5G Internet of Everything,only by allowing information and data to flow quickly along with the flow of high-speed rail and the logistics of stations,reducing information islands and breaking down data barriers,can a bright future of intelligent transportation be realized.
 
  China's communication technology leads the world just like high-speed rail technology.When 5G meets rail transit,a revolution on the wheels leaves people with infinite expectations.
 
  "5G+Unmanned Driving":Let Cars Read the World
 
  With the rise of the first wave of commercial 5G deployment,smart home,smart security,virtual reality,unmanned driving and other industries will be greatly promoted,and the most significant effect will be unmanned driving.
 
  Unmanned driving,also known as autonomous driving.Relying on the cooperation of artificial intelligence,visual computing,radar,monitoring device and global positioning system,self-driving cars allow computers to operate motor vehicles automatically and safely without human initiative.
 
  Because unmanned driving requires a large amount of Internet access data to operate normally,the current 4G network can no longer support a large amount of huge data.After the appearance of 5G network,thanks to the four characteristics of 5G technology,such as continuous wide-area coverage,hot spot,high capacity,low power consumption,large connection,low delay and high reliability,5G technology can transmit and process huge data generated by unmanned driving,and provide more accurate map positioning and more complex calculations,thus guiding unmanned driving to develop at a high speed,steadily and safely.
 
  It sounds like a wonderful journey in science fiction,but in fact,self-driving cars have been initially realized and have come into life.To some extent,autonomous driving is an important way to improve the level of road traffic intelligence and promote the transformation and upgrading of transportation industry,and it is also a favorable opportunity to promote the integration and development of transportation,automobile,communication and other industries.
 
  "The development of 5G has greatly promoted the landing of autonomous driving."Gao Li,a professor and doctoral supervisor at Beijing Institute of Technology,said this.At present,there are two technical routes for self-driving cars,one is self-perception,which relies on sensors such as laser radar to realize self-driving,and the other is vehicle-road coordination,which enables communication and connection between vehicles and vehicles,vehicles and roads by means of network communication."In the past,we thought that the two lines couldn't get together.Now,I think that in the future,large-scale self-driving depends on car networking,small-scale self-perception,and local self-perception.The future development must be inseparable from the development of 5G."
 
  In response to the help of the 5G era to autonomous driving,Gao Li also said that the base station density of 5G needs 10 times that of 4G due to its high frequency.Its application in the automotive field is different from that of mobile phones,and the delay needs to be controlled at a lower level.Previously,the Doppler effect occurred when the car was driving at a high speed,resulting in frequency changes when approaching and leaving,resulting in bad signals.However,in the 5G era,due to the denser base stations,both time delay and frequency shift will be overcome.
 
  Truly unmanned driving
 
  It can be said that unmanned driving in a non-5G network environment is not truly unmanned driving.Because the core technology that unmanned driving relies on is high-precision maps.
 
  By accurately describing the surrounding static environment,the high-precision map extends the sensing range of the sensor,and helps the car to know the location,the surrounding environment,how to carry out the next operation and other positioning decision-making problems at a finer scale.
 
  Compared with traditional navigation maps,high-precision maps have more layers and more information.In terms of the number of layers,the layers of high-precision maps can contain more data such as road level,traffic facilities,etc.From the perspective of layer quality,each layer of high-precision map is depicted more finely,so that centimeter-level navigation can be realized.High-precision maps provide special road information for automatic driving,and bring information necessary for machines.High-precision maps not only have the information of road shape,traffic direction,lanes,etc.that traditional navigation maps have,but also contain information such as lane divider types,traffic signs,speed limits,and some three-dimensional information of road geometry,such as curves and slopes.
 
  Why is unmanned driving necessary for 5G network?
 
  A netizen from Zhihu said this:
 
  1.Because the high-precision map needs to be updated in real time,the information collected by sensors and cameras can interact with the cloud through communication means(such as 5G network),which can make the map more intelligent.Path planning based on intelligent map information has higher traffic efficiency.
 
  2.The data volume of high-precision maps is huge,reaching Gbit/km level or above.It takes as little time as possible to complete the update,which requires ultra-high speed bandwidth.
 
  3.High-precision maps can provide information about specific objects(moving pedestrians and cars)beyond the radar and visual detection distance(NLOS),as well as traffic lights and speed limit requirements.based on this information,obstacle avoidance planning(including car-car game,car-man game,etc.)can basically ensure the safety of unmanned vehicles on open roads,and no any form of active collision and traffic violation will occur.The communication delay of this part requires ms level.
 
  The global path planning of unmanned vehicles in the era of vehicle networking is generally cloud-based decision-making or cloud-based decision-making,which requires high network delay,and some scenarios require ms level.
 
  The images collected by the vehicle sensors and cameras are equivalent to human eyes,the logical reasoning and decision-making of the automatic driving system are equivalent to human brains,and the motion control operation of the automatic driving system is equivalent to human hands and feet.Real-time communication of these information requires ultra-high speed transmission,high reliability and ultra-low time delay.Compared with the 4G network,the 5G transmission rate is increased by 100 times,the peak transmission rate reaches 10Gbit/s,and the end-to-end delay reaches ms level.For example,it takes at least 30 seconds to download a movie with a capacity of 1G through the 4G network and only 0.8 seconds through the 5G network.You can imagine how critical the reaction speed is when a vehicle encounters an emergency while driving on the road!only the ultra-high speed and ultra-low delay of 5G can meet the requirements of unmanned driving.
 
  Upgrade the 5G passenger experience
 
  In fact,our current demand for cars has gradually got rid of the primary needs of buying food and transportation.We hope that cars can be more understanding.When reversing into the warehouse,the car can automatically complete the whole process when the palms are sweaty and there is nowhere to put them in a panic;When you don't want to drive,the car can automatically drive and release your hands;When you retrieve your car from someone else's hand,you can return all the data to the state that is most suitable for your own driving without readjusting it...
 
  A smart car has more than hundreds of sensors,and the data transmitted to the cloud every day can reach 100MB,which covers the personal information of vehicles and users.For example,the location information can be obtained from GPS data,the driving habits of users can be obtained from the data of vehicle speed,steering wheel and braking,and the comfort preferences of users can be obtained from the settings of seats,air conditioners,ambient lights,etc.
 
  once the vehicle 5G technology matures,car manufacturers will add more sensors to new models,and any vehicle fault can be transmitted to the owner or even the manufacturer through sensors.Which parts have problems no longer need technicians to check and check item by item as before.
 
  If 4G has made the biggest change to the automobile industry,it has almost eliminated the third-party car navigator.The 5G Internet car is the core to promote the upgrade of intelligent networking technology.
 
  GSMA Intelligence Global TMT Ecosystem Research Director said:"Self-driving cars rely on embedded computers,which can collect and process a large amount of data in real time to form driving decisions.5G will connect driverless cars with a wide range of road systems,other cars and infrastructure.Today,many car manufacturers are using 4G networks for early applications,but cellular V2X needs 5G to expand its application range.For 5G,driverless driving is an important application case.Early deployment is already underway,but large-scale promotion may take 10 years or more.When drivers become passengers,they can work in cars or enjoy a variety of entertainment services."
 
  5G help unmanned driving
 
  Extra sensory perception-improving security
 
  Before driverless cars become mainstream,5G can bring changes to the driving experience.It collects relevant information from roadside infrastructure and other nearby cars.If the car brakes suddenly,the 5G connection can transmit data to the car's built-in computer,so that it can brake automatically.In order to prevent accidents,you can use the cellular eCall service to call aid workers without human intervention.
 
  Drivers,cyclists and road users will provide speed,position,trajectory and local atmospheric data anonymously.AI system will fuse the data with other road and vehicle data,including weather and surface conditions,road conditions and congestion information,so as to provide suggestions to road users and tell them what the route should be and when to pay attention to it.To protect privacy,the data of all road users are anonymous and confidential.
 
  "Car-to-car communication can provide support for intelligent mobile systems,help cars find the best route,avoid congestion and pollution,find the route with the lowest risk,and choose according to insurance information,priority and preference."
 
  Make"micro-mobility"effective-solve the congestion problem
 
  Many cities have so-called"micro-mobility"solutions,which are aimed at short trips.Because bicycle lanes and bicycle rental systems are becoming more and more perfect,and the cost of electric vehicles and motorcycles is falling,this service is becoming more and more popular.Sharing bicycles and motorcycles can make public transportation more convenient,because it is more convenient for everyone to go to or leave the subway station,which reduces congestion.The emergence of intelligent connection will help service providers to monitor the location,share the usage of bicycles and motorcycles,reduce the damage and build a sustainable business model.
 
  intelligent vehicle infrastructure cooperative systems
 
  This is the latest development direction of intelligent transportation system.Intelligent Vehicle Infrastructure Cooperative Systems is a safe,efficient and environment-friendly road traffic system based on wireless communication,sensor detection and other technologies to obtain road information,and to realize intelligent coordination and cooperation between vehicles and infrastructure through the interaction and sharing of information between vehicles and roads,so as to ensure traffic safety,improve traffic efficiency and reduce urban pollution.
 
  The connotation of Intelligent Vehicle Infrastructure Cooperative Systems has three points:first,it emphasizes the coordination of human-vehicle-road system;second,it emphasizes regional large-scale networking and joint control;third,it emphasizes the use of multi-mode traffic network and information interaction.It can be seen that the wireless communication network plays an important role in the coordination of intelligent vehicles and roads.
 
  With the arrival of 5G technology,the last link of Intelligent Vehicle Infrastructure Cooperative Systems will be gradually improved,and the integration of road network,sensor network,control network,energy network and management data basic platform will be accelerated,so as to realize the simultaneous operation of intelligent vehicles of different grades on the same road,thus achieving vehicle-road coordination.
 
  Digitization and intellectualization of road signs
 
  In this regard,at this year's Boao Forum,Miao Wei,Minister of China's Ministry of Industry and Information Technology,said that he had reached a consensus with the Minister of Transport to speed up the digital and intelligent transformation of China's roads,and the road signs and rules would be intelligently transformed.In the future,road signs(such as"please slow down for the road ahead"),traffic lights,etc.will be able to"independently"coordinate and control the passage time of car dealers and pedestrians according to the road conditions.
 
  Even in the minds of scientists,there will be a"virtual traffic light technology"in the future.The judgment of driving right and road right will be given to every car driving near an intersection,so that they can"collectively vote"to decide whether a certain car in a certain direction should pass or stop,and the driver will be reminded in the form of traffic lights through on-board display or head-up display technology.This means that every car is equipped with a set of traffic light system to remind the car to keep driving or stop according to the traffic light indication.
 
  High-speed barrier-free charging
 
  There are many reasons for high-speed congestion,among which high-speed toll is one of the major sources of congestion.
 
  At the recent regular press conference of the Ministry of Transport,Wu Chungeng,a spokesman,pointed out that the toll collection of toll stations will usher in a revolution,including the system transformation and construction of ETC lanes and the promotion of full coverage of electronic toll collection.
 
  In fact,the full coverage of electronic toll collection can also be regarded as the foundation of high-speed barrier-free toll collection.On the exclusive ETC lane,the relevant platform system will accurately locate the driving car in real time.When entering the automatic toll road section,it will automatically settle the high-speed toll information of the driving car,and the inter-provincial toll will also be included in the automatic settlement section.However,after the driving car receives the electronic toll information,the owner will make the independent electronic payment on the website,thus saving the process of parking payment.
 
  once the high-speed barrier-free toll collection work is on the right track,the expressway will transition from lifting bars to no bars,and fast traffic without stopping will also become a reality.
 
  Pre-identification of road accidents
 
  In intelligent traffic management system,road accident identification is an important basis for intelligent traffic management.
 
  At present,it seems that the current road accident identification mainly depends on image acquisition devices such as cameras to collect images in the field of road traffic monitoring,and to identify vehicles on road traffic,such as vehicle collisions,etc.However,this kind of identification still exists in the event of vehicle collision,and fails to play a preventive role.
 
  The intelligent camera in the future can analyze the vehicle images in road traffic in a structured way,and can predict the running state of the vehicle in a short time before the accident happens,before the vehicle collision event is killed.That is to say,by using various means,including artificial intelligence video analysis and other technologies,the accident situation of expressway can be forewarned,so as to realize multi-state pre-identification of road traffic accidents and avoid automatic driving accidents.This kind of pre-identification ability is also the development focus of the security industry in the next few years.
 
  In addition,air traffic with unmanned aerial vehicles as the main body will also be one of the development trends of intelligent transportation in the future.Road traffic in the future mainly has the following characteristics,namely,individual travel-sharing,group travel-customization,and vehicle operation-automation".
 
  With the help of the development of 5G,AI,Internet of Things and other technologies,intelligent transportation in the future will surely move closer to"automatic,active and humanized".
 
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