Dushanbe of April 2015, had regularly scheduled flights to major cities in Russia, Central Asia, as well as Delhi, Dubai, Frankfurt, Istanbul, Kabul, and Ürümqi amongst others. Tajikistan's principal railways are in the southern region and connect Dushanbe with the industrial areas of the Gissar and Vakhsh valleys and with Uzbekistan, Turkmenistan, Kazakhstan and Russia. The Dushanbe trolleybus system operates public buses in the city. Automobiles are the main form of transportation in the country and many highway and tunnel construction projects are underway or have recently been completed. Major projects include rehabilitation of the Dushanbe – Chanak (Uzbek border), Dushanbe
Soviet Central Asia the Russian Revolution of 1917 and the Russian Civil War of 1918–1921, the USSR was a union of several Soviet republics, but the synecdoche Russia — after its largest and dominant constituent state — continued to be commonly used throughout the state's existence. "Turkestan Autonomous Soviet Socialist Republic" (initially Turkestan Socialist Federative Republic) (April 30, 1918 – October 27, 1924) was created from the Turkestan Krai of Imperial Russia. Its capital was Tashkent, population about 5,000,000. British and Persian forces briefly tried to reach Baku in Azerbaijan and the Turkmen port of Krasnovodsk. Bukhara, Khiva, Samarkand, Kokand, Dushanbe and the