I know what you mean about bus routes in #OpenStreetMap, they're a little too complicated for me! Taking GPS traces can be good, but you'd have to make sure you document them, so people know it is a bus route, the number etc. If you're sitting on the bus taking a trace, you can add other bus related mapping, like where the bus stops are, does the stop have a shelter, bench, tactile paving, etc.
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