If you think about the role of transportation in the Soviet economy, you have to begin by asking what creates a need for it. I suppose that means you look at the geographic structure, at the resources, arable land, population, and so on which has to be unified in order to produce goods and services.
Naval War College Review: Vol. 10
, Article 4.
Available at: https://digital-commons.usnwc.edu/nwc-review/vol10/iss5/4