air-aware-labs/wef-marathon-air-quality

Interactive AirTrack analysis of modelled air quality along marathon routes in Paris, London, Bangkok, Accra and a Dakar running corridor. # AirTrack marathon route analysis An interactive look at modelled air quality along four marathon courses — Paris, London, Bangkok and Accra — plus a Dakar running corridor, for the hours each event was actually on the road. **Live site:** air-aware-labs.github.io Built by Air Aware Labs with the AirTrack modelling engine. ## What the site shows - Route-average and along-route concentrations for PM₂.₅, NO₂, ozone and PM₁₀. - A modelled 500 m concentration field for each city, with the course drawn on top and OpenStreetMap road and water context for orientation. - Place names, a locator inset and a corner card naming the city, country and event date, so a panel is identifiable on its own — including when screenshotted. - Coastal panels show the cells the model does not cover in grey, captioned as such: Accra's field is 15% no-data and Dakar's 51%, which is the Atlantic, not clean air. - Route replay and a distance scrubber linked to a kilometre-by-kilometre profile. - The same course over the 15 days around the event, to show whether event day was typical for the time of year. - Per-city evidence labels: how many reference monitors support the local estimate, and where the model is running without nearby measurements. ## Scope and limitations These are **modelled background** concentrations at 500 m resolution, for the event hours. They are not route measurements. - Event-day road closures are not modelled: the estimates reflect typical conditions for those hours, not the temporarily traffic-free course. - The immediate roadside increment (the last few metres to the kerb) is not included, so values beside a busy road are conservative. - Accra and Dakar have **no reference monitors** inside the modelled area. Those two cities are labelled indicative throughout, and the Dakar corridor is a running route, not a marathon course. - The whole Bangkok course falls inside a single global-model cell, so within-route contrast there co …