Rail transport in the Soviet Union the Soviet Union collapsed. Twenty other stations were under construction in 1985. The country's rapid transit system was the most intensively used in the world. The Soviet Union was a pioneer in the development of the diesel locomotive to replace the steam locomotive (dieselization) on non-electrified lines. But the USSR failed to make steady progress and while they lead the United States at first, they soon fell behind and their last steam locomotives were retired about 15 years later than for the US. The first mainline diesel locomotive in the world began running in 1924 in the USSR but it
Treaty on the Creation of the USSR Treaty on the Creation of the USSR The Treaty on the Creation of the USSR officially created the Union of Soviet Socialist Republics (USSR), commonly known as the Soviet Union. It "de jure" legalised a union of several Soviet republics that had existed since 1919 and created a new centralised federal government (Congress of Soviets of the Soviet Union and Central Executive Committee of the Soviet Union (TsIK) were the legislative while Council of People's Commissars was the executive) where key functions were centralised in Moscow. The Treaty along with the Declaration of the Creation of the USSR was approved