information:filtering, structural:expansion
Construction

On 9 March 1891, the Russian government issued an imperial rescript in which it announced its intention to construct a railway across Siberia. Tsarevich Nicholas (later Tsar Nicholas II) inaugurated the construction of the railway in Vladivostok on 19 May that year.

Lake Baikal is more than 640 kilometers (400 miles) long and more than 1,600 meters (5,200 feet) deep. Until the Circum-Baikal Railway was built the line ended on either side of the lake. The ice-breaking train ferry SS Baikal built in 1897 and smaller ferry SS Angara built in about 1900 made the four-hour crossing to link the two railheads.

The Russian admiral and explorer Stepan Makarov (1849–1904) designed Baikal and Angara but they were built in Newcastle upon Tyne, by Armstrong Whitworth. They were "knock down" vessels; that is, each ship was bolted together in the United Kingdom, every part of the ship was marked with a number, the ship was disassembled into many hundreds of parts and transported in kit form to Listvyanka where a shipyard was built especially to reassemble them. Their boilers, engines and some other components were built in Saint Petersburg and transported to Listvyanka to be installed. Baikal had 15 boilers, four funnels, and was 64 meters (210 ft) long. it could carry 24 railway coaches and one locomotive on the middle deck. Angara was smaller, with two funnels.

Completion of the Circum-Baikal Railway in 1904 bypassed the ferries, but from time to time the Circum-Baikal Railway suffered from derailments or rockfalls so both ships were held in reserve until 1916. Baikal was burnt out and destroyed in the Russian Civil War but Angara survives. It has been restored and is permanently moored at Irkutsk where it serves as an office and a museum.

In winter, sleighs were used to move passengers and cargo from one side of the lake to the other until the completion of the Lake Baikal spur along the southern edge of the lake. With the Amur River Line north of the Chinese border being completed in 1916, there was a continuous railway from Petrograd to Vladivostok that, to this day, is the world's second longest railway line. Electrification of the line, begun in 1929 and completed in 2002, allowed a doubling of train weights to 6,000 metric tons (5,900 long tons; 6,600 short tons). There were expectations upon electrification that it would increase rail traffic on the line by 40 percent.

The entire length of the Trans-Siberian Railway was double track by 1939.