Much of the world runs on informal transport networks.
However, it's difficult to assess how efficient these are.
A new study examines 7,000 bus routes in 36 cities across 22 countries in order to find out.
The results are pretty surprising:
A new paper in @NatureComms examines how informal public transport networks in lower-income countries self-organise without central planning.
It analyses over 7,000 bus routes in 36 cities across 22 countries.
@NatureComms Using GPS route data sourced from @openstreetmap, the researchers compared informal bus services with formal, centrally planned networks in higher income countries.