The Intelligent Signal Control and Coordination System functions on the essential principle of "data acquisition - dynamic regulation - efficient implementation". With comprehensive end-to-end technical support and well-thought-out features, it breaks the barriers of traditionally fixed signal timing, addresses problems of urban traffic signal management, and thus, achieves accurate and minimal traffic flow congestion on city streets."
The system's operational core is essentially its data acquisition and processing unit, which is the basis of its dynamic regulation capabilities. The front-end work depends on the traffic information gathering devices that can be called a "comprehensive perception network" which are units "connecting to different detectors like cameras and loops, uploading traffic data detected by signal controllers at user-defined intervals". By doing this they not only cover the key real-time data like traffic volume, lane occupancy, vehicle speeds, etc but on top of that, they pre-process the data based on certain control requirements. This guarantees that the data being uploaded is in compliance with uniform formats and system transmission standards. The real-time data are swiftly sent to the central management control unit which is a combination of a central server, a database server, and regional (optimization) servers. Using advanced built-in optimization models, this unit goes for deep data analysis to figure out current traffic conditions and thus be the scientific basis for the adjustment of the traffic signal dynamically. In achieving this, the system moves smoothly "from data acquisition to decision output". On the other hand, the traffic signal controller, which is the core device of the system, also has a 32-bit microprocessor and a modular design. It is capable of 24-hour automated control and also has power failure protection which can prevent the loss of the timing information and control parameters and thus, provide stable and reliable hardware support for data acquisition and processing.
Regarding hierarchical control logic, the system has a three-level distributed hierarchical control structure that is used to create a dispatch system with "clear responsibilities and efficient coordination" as its main features. The central control level, which acts as the "top-tier management hub", is not involved in the adaptive control directly. Its main work includes: helping different service modules to upload, download and synchronize system parameters; through the user terminals monitor the overall system status in real-time so that the administrators can change the key parameters; perform the statistical processing of the traffic information all over the network in order to produce the traffic logs; and, standardizing the data and providing it to the higher-level command systems for macro-level traffic decision-making. The Regional Control Level is mainly engaged in "dynamic zone optimization" and is the core component for real-time adaptive control. Alongside this, it is monitoring the operational status as well as the faults of traffic signal controllers at the intersections within the controlled zone and at the same time it is coordinating and optimizing signal control based on the collected zone-level traffic flow data. In such a way, it is ensured that the changes of isolated intersections do not get detached from the surrounding road network. The intersection control level is the "execution terminal" that comprises the signal controllers and detectors. It is directly involved in the traffic signal transitions at junctions whereas at the same time it is continuously receiving and transmitting traffic flow data, and also reporting equipment status and faults. Besides this, the level is also equipped with the local single-point signal optimization which creates a fully fledged control loop: "top-level coordination – zone-based coordination – intersection execution".
Scenario-based functional design is the key factor of a system that it ensures the accurate needs of the real traffic demands. To solve the problem of traffic flow change during daily peak, off-peak, and low-traffic periods, "single-point multi-period control" divides the time slots by traffic volume and for each of them it puts into practice (peak, off-peak, and low-traffic) timing schemes in order not to allow the fixed timing to cause the waste of resources.
"Green wave control for main roads" is the one that makes the roadworks along the main roads to be coordinated so the vehicles can be continuously flowing and their stopping time is minimized. In case of emergency, "remote manual control" with the tiered user permissions used by operators allows the signals to be manually controlled during incidents (e.g., accidents, roadworks) and automatically control to be established again after order is restored.
"Emergency Vehicle Priority Control" is the one which first gives the green light to emergency vehicles by signal according to their predetermined schedules and routes and also reacts to some urgent requests that are sent by the specialized vehicles like police, fire, and ambulance. It is by changing the signals along the route that it allows the emergency vehicles to be the fastest.
To solve the problems of congestion management "Single-Point Adaptive Control" is the one that at the same time collects the traffic flow and occupancy data in real-time and by doing this it is able to dynamically optimize signal cycle lengths as well as green phase durations, thus the intersection throughput efficiency is improved.
"Queue Spill Control" is the one that upon the occurrence of spillover at the exit point automatically changes the mode to saturation control thus, which in turn may trigger a chain of congestion. By doing so, i.e., on the one hand, it shortens the green light duration at the upstream junctions and on the other hand extends it at the downstream junctions thus, stopping the spreading of congestion, and taking care of traffic scenarios requirements in a comprehensive manner.
FAQ – Frequently Asked Questions
1. When and where will the Expo be held?
The Expo is scheduled to be held from May 13–15, 2026, at
Hall C, Xiamen International Conference and Exhibition Center (XICEC), Xiamen, China.
2. What is the exhibition scale?
The event covers a 40,000 m² area with 350+ companies exhibiting their products and services and attracting over 30,000 professional visitors from all over the world.
3. What activities are included?
More than 80 professional forums and events that will investigate topics like smart mobility, transportation communication, safety, and sustainable development.
4. How many countries and regions are involved?
The conference will be attended by participants from 80+ countries and regions, thus becoming a global meeting of intelligent transportation innovation.
5. Are there opportunities for cooperation?
Indeed. By having more than 1,000 global partners, the Expo is a great place to meet and do business with other companies, share technology, and find investment opportunities.
6. Who can I contact for details?
We would be glad to help you if you contact the Organizing Committee via the "Contact Us" section of the official website.
