With the deepening of urbanization and motorization in China, traffic congestion has become increasingly prominent and has become one of the major bottlenecks restricting urban development. The appearance of traffic signal lights makes the traffic can be effectively controlled, which has obvious effects on dredging traffic flow, improving road capacity and reducing traffic accidents. The traffic signal light is generally composed of red light (meaning no passing), green light (meaning passing is allowed) and yellow light (meaning warning). It can be divided into motor vehicle signal light, non motor vehicle signal light, crosswalk signal light, lane signal light, direction indicator signal light, flashing warning signal light, road and railway intersection signal light, etc. according to different forms and purposes.
According to the in-depth market research and investment strategy forecast report of China’s vehicle signal lamp industry from 2022 to 2027 by China Research Institute of China Research&Development Co., Ltd.
In 1968, the United Nations Agreement on Road Traffic and Road Signs and Signals stipulated the meaning of various signal lights. A green light is a traffic signal. Vehicles facing the green light can go straight, turn left or right, unless another sign prohibits a certain turn. Vehicles turning left and right must give priority to vehicles legally driving in the intersection and pedestrians crossing the crosswalk. A red light is a no go signal. Vehicles facing the red light must stop behind the stop line at the intersection. The yellow light is a warning signal. Vehicles facing the yellow light cannot cross the stop line, but they can enter the intersection when they are very close to the stop line and cannot stop safely. Since then, this provision has become universal throughout the world.
The traffic signal is mainly controlled by the microcontroller or Linux processor inside, and the peripheral is equipped with serial port, network port, key, display screen, indicator light and other interfaces. It seems not complicated, but because its working environment is harsh and it needs to work continuously for many years, it has high requirements for product stability and quality. Traffic light is one of the important components of modern urban traffic system, which is used for the control and management of urban road traffic signals.
According to data, the earliest traffic signal light in China was the British Concession in Shanghai. As early as 1923, the Shanghai Public Concession began to use mechanical devices at some intersections to instruct vehicles to stop and move forward. On April 13, 1923, two important intersections of Nanjing Road were first equipped with signal lights, which were manually controlled by the traffic police.
Since January 1, 2013, China has implemented the latest Provisions on the Application and Use of Motor Vehicle Driver’s License. The interpretation of the new provisions by the relevant departments clearly mentioned that “grabbing the yellow light is an act of violating the traffic signal lights, and the driver will be fined more than 20 yuan but less than 200 yuan, and 6 points will be recorded.” Once the new regulations were introduced, they touched the nerves of motor vehicle drivers. Many drivers are often at a loss when they encounter yellow lights at intersections. The yellow lights that used to be “reminders” for drivers have now become “illegal traps” that people fear.
The development trend of intelligent traffic lights
With the development of the Internet of Things, big data, artificial intelligence and information technology, the transportation department realizes that only by using high-tech means can the increasingly serious traffic problems be improved. Therefore, the “intelligent” transformation of road infrastructure has become an inevitable trend of the development of intelligent transportation. Traffic light is an important means of urban traffic management and control, and the upgrading of signal light control system will have great potential to ease traffic congestion. Under the background of rapid development of artificial intelligence technology, intelligent traffic signal lights based on image processing and embedded systems emerge as the times require for digital sorting and digital acquisition of road traffic facilities and equipment. For the solution of intelligent traffic signal control system, the solution provided by Feiling embedded system is as follows: in the roadside control cabinet of the traffic signal light field at each intersection, the traffic signal can be designed with the relevant embedded ARM core board of Feiling embedded system.
Post time: Oct-21-2022
