Thanks for this suggestion. We've added it to our Feature Requests list (number 128).
would it be possible to add overlays by waymarkedtrails.org (walkimg / cycling) to the route planner?
I just found that they are available on some routing portals.
It would be a very nice additional feature as you could see waymarked cycling routes independently from the chosen map style while planning routes (sometimes Opencyclemap has not the best colours and names of towns are not visible in some zoom levels).
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