Перевести though the quality of service is high there is still significant overcrowding on certain lines at peak periods. this problem is being discussed and additional improvement of service is planned for the future. a number of station modernization schemes are being completed. the aim is to provide a more attractive environment for the passengers. the usage of modern materials makes maintenance easier. this modernization is coordinated with the renewal of lifts and escalators and the introduction of new ticketing machines. the fare in the underground depends on the distance, but the lowest is 50 pence the underground is becoming much cleaner and brighter and therefore' more pleasant to use, carrying more passengers than at any time in its long crime levels in london are generally reflected by crime levels on london's transport. according to 1he statistics the crime level in the underground is father high. to ensure safety of passengers and the staff the transport authorities added more police officers to the underground system to guarantee as much protection as possible.