 Important roads and railways like the Trans-Siberian Highway (Federal M53 and M55 Highways) and Trans-Siberian Railway connect Irkutsk to other regions in Russia and Mongolia.The city is also served by the Irkutsk International Airport and the smaller Irkutsk Northwest Airport.The Federal road and railway to Moscow and Vladivostok pass through the other side of the Angara River from central Irkutsk.