As a very important electromechanical system integrating train traffic control and train operation control, the signal system is directly related to the operation safety and efficiency and service quality of urban rail traffic system. It guarantees the safety of passengers and trains and realizes the function of fast, high-density and orderly train operations.

As the network platform of subway engineering operation command, business management, passenger service and information delivery, the communication system provides the subway operation with fast, accurate and reliable voice, data, and image information transmission and exchange. Under normal circumstances, the communication system should guarantee the safe and efficient operation of the train, provide high-quality travel services for passengers, and under abnormal circumstances, it can quickly transform into a command system for disaster prevention and rescue, and accident handling.

The platform and train operation area are separated by the subway shield gate system to reduce the loss of cold air in the station caused by cross-ventilation and guarantee the safety of trains and passengers entering and exiting the station. The train operation noise is reduced, and a safe and homelike waiting environment is created for passengers. Thus the energy-saving, safe, environmental-friendly, aesthetic functions are provided.

Based on computer, communication, network, automatic control and other technologies, AFC system realizes the automatic fare collection system of rail traffic with whole process of ticket sales, ticket check, billing, charging, statistics, sorting, management etc.

PIS passenger information system relies on the multimedia network technology, takes computer system as the core and station and vehicle-mounted display terminal as the media to provide passengers with information service. Under normal circumstances, the system provides passenger notice, train arrival and departure time, train schedule, announcement, ad and other real-time dynamic multimedia information; under emergency circumstances, prompt for dynamic emergency evacuation is provided.