Moscow_Central_Diameters
Moscow Central Diameters
Russian regional rail network
The Moscow Central Diameters (MCD) (Russian: Московские центральные диаметры (МЦД), romanized: Moskovskiye tsentralnye diametry (MTsD)) are a system of city train services on existing commuter rail lines in Moscow and Moscow Oblast, Russia.[1]
The system began operation on 21 November 2019, when the first two lines were launched.[2] After first 9.5 months of operation, the passenger traffic of the Moscow Central Diameters reached 100 million.[3] On 27 December 2019, passengers made record 554.6 thousand trips.[4]
Line D3 was opened on 17 August 2023, and Line D4 was opened on 9 September of the same year.[5][6]