Final answer:
Metro systems often employ automatic systems such as automated ticketing, automatic train control (ATC), and real-time passenger information systems for efficient and safe operations.
Step-by-step explanation:
Automatic systems in metro rapid transit systems are essential for efficient operation, offering several benefits such as safety, reliability, and the ability to manage high-volume passenger traffic. In the case of this particular city, which has a highly-rated rapid transit system utilized by a significant proportion of the population, one might find various types of automatic systems.
These could include automated ticketing, which speeds up the boarding process and reduces the need for staff at ticket counters; automatic train control (ATC), which involves the automation of train operations including train protection, signaling, and regulation; and real-time passenger information systems, which provide up-to-the-minute information about train schedules and delays to passengers.
Considering the environmental efforts of the city, with a high rate of trash recycling contributing to employment, it can be inferred that sustainability initiatives may also be integrated into the metro system, possibly featuring energy-efficient technologies or regenerative braking systems on trains.