Which railway is commonly described as the world’s longest railway line, linking Moscow and Vladivostok?

The Trans-Siberian Railway is commonly described as the world’s longest railway line.

Its principal route runs from Moscow across Russia to Vladivostok on the Pacific coast, covering about 9,289 kilometres. A journey along the main line crosses eight time zones and usually takes around a week by scheduled passenger train, depending on the service and stops.

Construction began in 1891 during the Russian Empire and the main route was substantially completed in the early twentieth century. The railway crosses the Ural Mountains, Siberian forests, the Irtysh and Ob river regions, and the area around Lake Baikal.

The Trans-Siberian system also includes branches toward China and Mongolia. The Trans-Mongolian and Trans-Manchurian routes are related international lines, but they do not represent the principal Moscow–Vladivostok route.