You could add features of modern metros that result from using innovative technology: Due to computer control and rapid communication, they are more punctual than ever before, and accidents are less likely. Sensors in the cars and rails detect equipment failures early, allowing rapid, lower-cost maintenance. Modern materials are more rugged and durable, resulting in lower operating costs. Drive motors are more efficient, resulting in lower energy use, lower fuel costs, and less pollution. Web-connected metros provide passengers with wireless access to make commutes more productive.

I need to express how modern metros are. They are equipped with the most innovative technology/ the cutting edge facilities. What else and how else could I say? Thank you I am assuming that you are talking about underground railways. They are called different things in different countries. In America we call them "'subways" as well as some other local names. In London, they are referred to as "the tube" or "the underground" . What you said is good, but I would make two sentences. "They are equipped with some of the most innovative technology. Many of them have cutting edge facilities." You could add that there are always more advances to be made, but that is dependent upon the funding that is available.