From 2000 to 2010, the Moscow authorities built 18 more stations. The network now includes modern trains with screens and climate control systems, a new transport card "Troika", ticket machines and free wi-Fi. As a result, the Moscow metro ranks first in Europe in terms of annual passenger traffic and because of the short period of time between trains in rush hour (90)seconds.), The Moscow metro ranks first in the world in frequency. In September 2016, the Moscow Central Circus was opened. It was an incredibly important event.During the reign of Tsar Nicholas Ile in the early 20th century, this ring railway was used to transport goods and passengers. But, due to the small number of passengers, he stopped transporting people after 1934. 1. Almost 100 years later, Muscovites received a new transport line integrated into the existing system of metro, commuter trains and land transport. There are 31 stations with 33 modern trains "Lastochka", which run every 6 minutes during peak hours. However, all these changes are just the beginning. It is planned to open 41 new metro stations for passengers from 2017 to 2019.The Moscow metro is not only a transport system and a work of art, but also a venue for cultural exhibitions, concerts and shows.