The pilot guard traffic signal control system solution realizes the automatic control and optimization of the traffic signal timing scheme at the intersection through the networked operation and control of the traffic signal controller, reduces the waiting time of vehicles at the intersection, balances the traffic flow on the road network, and improves the road traffic. Traffic efficiency and ease traffic pressure. At the same time, the system also has the function of collecting traffic parameters, which can collect and statistics the traffic flow information in real time.
Background and challenges
With the continuous increase in the number of cars in our country and the increasing level of urbanization, the contradiction between traffic demand and road transportation facilities has become increasingly apparent, causing serious road congestion. In addition to increasing road construction, traffic management departments also need to build intelligent traffic signal control systems to evenly divide the traffic pressure on the road network, improve the efficiency of existing roads, and ease traffic pressure.
交通信号控制系统采用路口控制级、区域控制级和中心控制级三级架构，具有定周期控制、感应控制、线协调控制、区域自适应控制和特殊控制等功能，可实现路口自适应控制、绿波控制、特勤路线控制、公交优先控制等功能。 The pilot guard traffic signal control system adopts a three-level architecture of intersection control level, area control level and central control level. It has functions such as fixed-cycle control, induction control, line coordination control, area adaptive control, and special control, which can realize intersection adaptive control. , Green wave control, special service route control, bus priority control and other functions.
1) Flexible signal control scheme
The system can comprehensively weigh the traffic conditions of the road network through a variety of control strategies, and reasonably configure the cycle, green signal ratio, phase difference, and operation plan of each intersection of the road network to adapt to changes in traffic flow, thereby ensuring the utilization of the road network Optimal efficiency.
It supports single-point control based on signal machine, and it can also realize area coordinated control based on upper computer. In the construction of urban traffic signals, uniform equipment models can be used to meet the needs of personalized solutions at different points.
2) Support video traffic parameter acquisition equipment access
The front-end traffic signal has the function of interconnecting with the video car inspection device. The traffic signal receives the traffic parameters of the video car inspection device through the network and performs inductive control according to the traffic parameters of the video car inspection device, which can avoid the problem that the coil detection method needs to damage the road and easily damage .
3) Convenient equipment maintenance design
The signal machine adopts a rack-type hardware design, and the power board and the light control board are standardized into independent equipment modules. The rack-type design can find the fault point through simple module replacement during equipment maintenance, and quickly repair the fault signaler to ensure the equipment runs stably for a long time.
4) Independent and stable fault detection and processing
An independent and stable fault detection and feedback module monitors the signal control signals output by each channel in real time. Prevent the malfunction of signal lights that affects traffic operation, and conduct preliminary diagnosis of faults to assist management personnel in clarifying the cause of the fault.
5) Open NTCIP protocol
The system uses an open communication protocol-NTCIP, which provides a standard-compliant protocol interface and is compatible with the NTCIP communication protocol system.
The NTCIP protocol caters to the current trend of technological development and breaks the traditional monopoly system of intelligent traffic control systems (such as SCOOT, SCATS). By adopting an open protocol mechanism, competition is introduced, which reduces the system's operation and maintenance costs and system expansion costs.