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🚇 Engineering Underground Transit Hubs

An interactive 3D cutaway of a deep multimodal transit hub: adjust station depth, peak passenger load, egress cores and emergency ventilation to see evacuation time and airflow respond.

Transport & Urbanism3DAdvanced60 FPS

A cutaway 3D model of a deep multimodal transit hub — street concourse, mezzanine, metro platform and a freight bore stacked below — where station depth, passenger load, egress design and emergency ventilation all trade off against each other.

🔬 What It Demonstrates

Evacuation time is driven by both vertical travel distance and stair/escalator queueing capacity, while smoke-control ventilation must scale sharply upward the moment an emergency is declared.

🎮 How to Use

Set station depth and peak passenger load, choose one or two egress cores, then flip on emergency smoke-extraction mode and watch the evacuation time, airflow and animated pedestrian flow all respond live.

💡 Did You Know?

Adding a second independent egress core can cut platform evacuation time nearly in half — which is why deep, high-traffic interchange stations are almost never built with a single stairwell.

⚙ Under the hood

An interactive 3D cutaway of a deep multimodal transit hub: adjust station depth, peak passenger load, egress cores and emergency ventilation to see evacuation time and airflow respond.

transiturban planninginfrastructuredeep undergroundmultimodal transportevacuationThree.js

3D · Three.js / WebGL renderer · 60 FPS target · runs fully client-side, no install