One traveller, two modelling views

In one sentence

Not a different answer to the strategic question — a visible journey behind the total.

Why it matters

In the zonal view one traveller becomes part of a zone total: a flow of N travellers into the network. In the agent-based view the same person walks to a specific stop, waits four minutes, boards a specific departure, transfers and arrives — and the timeline shows where the journey time goes.

Agent-based simulation is usually explained with equations or with a screenshot of a running model. Neither shows why a planner should care. These explainers show the mechanism itself — one person, one day, one score — so that the results on a dashboard stop being a black box.

Sources

• Schematic illustration; values are illustrative

What you see

1. 00.0Zonal view: part of a total
2. 05.0Agent view: walks to a stop
3. 07.4Waits, boards
4. 10.0Transfers, arrives
5. 14.0Every step visible

Use this explainer

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