SWITCH

Everyone should make it home. After the fatal accidents at Adamuz and Urda, I asked what I could contribute. SWITCH turns that question into a working decision-rehearsal tool: follow the published evidence, test an alternative and revisit the decision when a new report arrives. The real-network workspace combines 60,018 IGN railway links with timestamped positions published by Renfe. Ask Meta about an observation or a hypothetical closure. It opens the sources, asks an independent geographic engine to test alternatives and drafts a review alert whose evidence you can inspect. A separate interactive 3D workspace offers four fictional missions. Conflicting reports, occupied sections and a new maintenance notice change the available plans. The 3D trains, occupancy chart and replay use the same scenario engine and clock; old decisions remain inspectable instead of being silently rewritten. The public demo supports English and Spanish. Train refresh, navigation and simulation work without model calls; Meta runs only when a visitor asks. Original code is MIT and the repository includes 78 automated tests. Railway geography is not operating authority, and the fictional rehearsal does not control real trains or establish a proven accident-prevention outcome. Try the live product: https://switch-rail-demo.onrender.com/ Render Free may take about a minute to wake after inactivity. No login or API key is needed from the reviewer.