Three overlapping segments logic

[wlodek76]

Additional case, probably never will in real, but maybe it is worth to note it inside the code. Based on real example: https://www.waze.com/pl/editor/?env=row&lon=16.97116&lat=52.33736&layers=1412&zoom=7&segments=278928679

[milkboy]

probably not too common issue ;)