Transportation Network

1. Summary

The underground railway system evolved gradually as the facility expanded.

2. History

The underground railway system was not conceived as a single unified network in 1939.

Instead, its various components were constructed over several decades according to changing logistical, scientific, and security requirements.

See: Places › Surface

3. Function and Contents

The system consists of three principal transportation categories.

3.1 Conventional Freight Railway

A1 ↔ D2

This railway transports ordinary industrial cargo, food, equipment, building materials, and logistical supplies.

Its infrastructure includes loading platforms, cargo handling systems, and industrial elevators.

It is the principal connection between the logistics complex and the main research installation.

3.2 Personnel Railway

H1 ↔ D2

This line provides secure transportation for scientists, officers, and other authorized personnel arriving through the concealed heliport.

Passengers descend from the helicopter hangar through an elevator system before boarding a dedicated underground train.

The train terminates at the D2 Personnel Arrival Terminal.

From D2, personnel access deeper research sectors through the internal elevator system and controlled corridors.

The route bypasses D1.

3.3 Hazardous-Material Railways

D3 ↔ A4

D5 ↔ A4

A direct D3 ↔ D5 transfer also exists; it is sealed.

These lines transport dangerous materials between the biological research facilities and the isolated disposal complex.

Their operating procedures are more restrictive than those of the conventional freight network.

The D3 and D5 lines remain independently controlled to reduce the consequences of a failure in either corridor.

Where terrain elevation and facility depth differ, transportation is accommodated by appropriate underground gradients, industrial lifts, and secured transfer stations.

The level designation of one installation does not imply that it lies at the same absolute elevation as a similarly numbered level elsewhere.

3.4 Technical Service Galleries

A2 and A3 are primarily connected to the main installation through secured utility corridors rather than conventional railways.

These galleries contain electrical distribution infrastructure, water pipes, ventilation ducts, maintenance access routes, and other industrial systems.

They are not intended for ordinary passenger transportation.

3.5 Elevators Between Levels

Every elevator of the main facility joins one level only to the level directly above or below it; no elevator crosses several levels. For security, the elevators of consecutive pairs stand in different places, so reaching the next elevator means crossing the level.

Whenever an elevator does not work, a parallel route exists between the same two levels, harder than the elevator.

3.6 Network Condition in the Game

The complete underground transportation network is not necessarily operational.

Some railways remain functional.

Others are abandoned, damaged, blocked, or inaccessible due to security restrictions.

Selected connections may have been shut down during the 1999 emergency.

The condition of each route affects exploration and progression.

The player may discover abandoned railway platforms, disabled trains, sealed transfer chambers, maintenance corridors, and evidence of the facility's final evacuation.

4. Architecture and Style

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5. Security and Access

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6. Connections

See: Places › A1 — Logistics And Supply Complex

See: Places › A2 — Power And Utilities Complex

See: Places › A3 — Environmental And Life Support Complex

See: Places › A4 — Hazardous Materials And Disposal Complex

See: Places › H1 — Concealed Heliport Access Terminal

See: Places › D1

See: Places › D2

See: Places › D3

See: Places › D5

7. Concept Image

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8. Open Questions

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