the metro has a gauge of 1520 mm, like most russian railways. it gets the electricity from a third rail. the metro is run on a voltage of 825v ac. the average distance between stations is 1800 m. the shortest is 300m between the stations alexandrovskiy sad and arbatskaya. the longest distance between stations is 6627 m between krylatskoe and strogino. the long distance helps trains travelling faster and more efficient.