The network changes when the city changes pace
Routes may have lower frequency, specific departures, or no service on certain days. Some have separately identified variants or night services. A search that mixes all these operations can hide both a real reduction and an available alternative.
The first step is to consult the current calendar and operational plan. Then, the observed history must be divided by time period and day type.
How to detect a supply void
The most relevant sign is not an isolated absence, but repetition. A route that stops appearing on several consecutive early mornings, while the source remains healthy for other routes, deserves investigation. It is also important to measure the time between updates and whether another route covers the same corridor.
- Separate weekdays, Saturdays, Sundays, and holidays.
- Compare planned time with observation window.
- Check general health of the GPS source.
- Distinguish regular service, night service, and route variants.
- Map alternatives and the distance to the nearest stop.
Why the territorial profile matters
The same supply reduction has different effects. In an area with a subway, train, or several parallel routes, alternatives may remain. In peripheral neighborhoods with a single connection, the disappearance of a route can cut off access to night work, healthcare, and education.
The Bairro em Movimento series must therefore combine observed supply with the location of opportunities and transfer options. Counting buses is only the beginning; the larger question is whether people can still reach the city.