World Transport and Communications

World Trade Routes and Strategic Energy Chokepoints already covers the world's major sea-lane chokepoints, the Strait of Hormuz, the Strait of Malacca, the Suez Canal and its Sumed pipeline backup, Bab-el-Mandeb, the Turkish and Danish Straits, and the Panama Canal, in the depth a dedicated chokepoints note requires. This note does not repeat any of that; it covers the rest of this chapter, the world's named land transport routes and the geography of global communications infrastructure.

The world's named transcontinental railways

Three railway lines are named often enough in this chapter's own tradition to be worth holding as a fixed set, each the defining transport link of the country it crosses. The Trans-Siberian Railway, connecting Moscow to Vladivostok across 9,289 kilometres and eight time zones, is the longest railway line in the world, built over 25 years from 1891 to 1916 specifically to bind European Russia to its vast, otherwise remote Siberian and Far Eastern territory. Canada's transcontinental line, completed in 1885, connected the country's Pacific and Atlantic coasts for the first time and is remembered as much for its political role, fulfilling the promise that brought British Columbia into Canadian Confederation, as for its transport function. Australia's Trans-Australian Railway, crossing the Nullarbor Plain between Port Augusta and Kalgoorlie, holds a more specific, frequently tested record: it includes the longest dead-straight stretch of railway track in the world, running for roughly 478 kilometres without a single curve, a direct consequence of the flat, treeless, essentially featureless desert plain it crosses.

Canals as transport infrastructure

Beyond their role as oil-trade chokepoints already covered elsewhere, the world's major ship canals are transport infrastructure in their own right, and the exam-relevant distinction between the two most significant is engineering rather than geography. The Suez Canal, connecting the Mediterranean and Red Seas, is a sea-level canal with no locks, since the land it crosses in Egypt sits at a roughly uniform low elevation throughout. The Panama Canal, connecting the Atlantic and Pacific across the higher, more uneven terrain of the Isthmus of Panama, instead relies on a system of locks that raise ships up to an artificial lake partway across the isthmus and lower them back down on the other side, precisely because a sea-level cut was not practical across that terrain. Europe's own Kiel Canal, connecting the North Sea to the Baltic across northern Germany, is shorter than either but is, by number of ships passing through it each year, the busiest artificial waterway in the world, since it lets vessels avoid the long detour around the Jutland peninsula through the Skagerrak and Kattegat straits.

World communications: undersea cables, not satellites

The single most counter-intuitive, and most exam-relevant, fact in world communications geography is that international data does not travel mainly by satellite: roughly 99 percent of all intercontinental internet and voice traffic, including the great majority of international financial transactions, runs instead through a global network of submarine fibre-optic cables laid along the ocean floor, several hundred of them, spanning well over a million kilometres of seabed in total. Satellites remain important for coverage in remote areas poorly served by any cable and for specific applications like GPS positioning and weather observation, but they carry only a small fraction of the world's actual data volume, since a fibre-optic cable can carry vastly more data per second than a satellite link can. These cables broadly follow the same handful of chokepoint routes already named for oil and general shipping, since a cable, like a ship, still has to cross the same straits and narrow seas to connect one landmass to another, which is exactly why a single incident, an anchor drag or an undersea landslide near a strait like those already covered, can disrupt internet connectivity across an entire region at once.

Quick revision points

• Trans-Siberian Railway (Moscow to Vladivostok, 9,289 km, 8 time zones, built 1891 to 1916): the longest railway line in the world.
• Canada's transcontinental railway (completed 1885): first rail link between Canada's Pacific and Atlantic coasts, and the political promise that secured British Columbia's entry into Confederation.
• Trans-Australian Railway (Port Augusta to Kalgoorlie, across the Nullarbor Plain): includes the longest dead-straight stretch of railway track in the world, about 478 km with no curve.
• Suez Canal: sea-level canal, no locks (uniformly low terrain). Panama Canal: uses locks to cross the higher, uneven Isthmus of Panama. Kiel Canal (Germany, North Sea to Baltic): shorter than either, but the busiest artificial waterway in the world by ship count, since it avoids the long detour around Jutland.
• Roughly 99% of intercontinental internet and voice traffic runs through submarine fibre-optic cables, not satellites; satellites matter for remote-area coverage, GPS and weather observation but carry only a small fraction of total data volume. Cables broadly follow the same chokepoint routes already named for oil and shipping.