Railroads
Railroads played a key role in Russia and, in fact, the whole world in the early 20th century. Russia had a well-developed railroad network, concentrated mostly in the European part of Russia. (Over 85% of the railroads were west of the Urals.)
As a result of World War I, many railroads were damaged or completely destroyed. By November 1917, only half of the railroads were functional. One-third of the locomotives were inoperable.
Railroad workers constituted one of the biggest professional groups in Russia (almost 1.5 million people). They were actively involved in the revolution from the very beginning and, in fact, played a leading role in many events. For example, it was due to their efforts that the Tsar’s train failed to arrive in Petrograd from Mogilyov in February 1917.