Support comma-separated list for routes
Some routes are suited for differnent activities and tagged with "route=<comma-separaded-list>" (e.g. "route=mtb;hiking;horse"). But these routes are currently not shown here. Example: Bicentennial National Trail in Australia:
waymarkedtrails <-> OSB
Maybe you can just change the queries from "relation[type=route][route=<activity>]" to "relation[type=route][route~<activity>]" (for hinking, mtb and maybe other types). Maybe that will be slower then, but if some routes are missing this isn't too good either.
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