Production2024
Transport Tracker
Real-time ingestion and visualisation of national transport feeds.
- Phoenix
- LiveView
- Real-time systems
- Geospatial
Problem
Transport data arrives from several operators, each with a different feed format, update frequency and definition of "on time". Naively merging them produces a view that flickers, contradicts itself, and loses trust the moment a predicted arrival jumps backwards.
Next arrival2:48
System
Transport Tracker consumes multiple real-time feeds, normalises them to a common schema, and maintains a single reconciled state of where every vehicle is and when it will arrive. A streaming layer pushes only the deltas to clients, so the map stays smooth on a phone on a slow connection.
Decision
A reconciliation layer that prefers stability over freshness
The hard part is not ingesting feeds, it is deciding which source to believe when they disagree. The system keeps a confidence-weighted estimate per vehicle and damps predictions so arrivals never jump erratically — a slightly stale but stable number beats a precise one that jitters.
Demonstrates
Real-time engineering end to end: multi-source ingestion, state reconciliation, streaming deltas and a UI tuned for trust under noisy data.