Greater Ring of the Moscow Railway

The Greater Ring of the Moscow Railway (Russian: Большое кольцо Московской железной дороги) is the common name for a system of connector lines between the railways that radiate from Moscow. The general configuration of the Greater Ring is a ring around the main part of Moscow (outside Moscow). It forms part of the radial-ring structure of the Moscow railways. The Greater Ring crosses the rail lines in all 11 radial directions from the railway stations of Moscow. It totals 584 kilometres (363 mi) in length. For its entire length, the ring is equipped with an automatic locking system, permitting, where necessary, two-way single-track operation; elsewhere, there are two track and multiple track sections.

The ring allows freight trains to be transferred from one railway to another without entering Moscow; to a lesser extent, it is used for the same purpose by long-distance passenger trains as well. This reduces the transit traffic volume on the innermost sections of the radial rail lines, and makes more time slots available for running commuter trains between Moscow's rail terminals and the city's suburbs. The ring also serves transportation needs of towns and industrial customers located along it.