Complex bus routes handling

[attilakundev]

There are bus routes which can go into some villages that are type of "cul-de-sac" that is they connect only to the main road but they're side villages. This means the bus route can take the same path twice during the route because entering the village - stopping at the bus turn - exiting the village.

Great example is https://www.openstreetmap.org/relation/9640001#map=15/47.9936/18.8613 (added coordinates to show what I'm talking about)

The program would not collect the route pieces correctly because it only takes one route piece once. In the case of these bus relations, this is problematic.

It might be good if you added how the bus stops are coming in the route (like 1-2-3-4-1 bus stops), so it is corrected well.
If you take the task, and it's still unclear, then please ask :)