Highlight the route of Bundesautobahn 4 (A4) on a map
How can I safely visualize the route of Bundesautobahn 4 ([relation 48147][1]) to the default OSM map (ideally directly at osm.org)? Best way would be to highlight the route the same way like the current relations do. If the relation has no sub-relations then it draws itself nicely ([like the A1][2] - though this relation is missing the north part of A1). But the problem with A4 is that it contains sub-relations with the actual route and these will not highligh anymore.
anymore ([explained here][3]).
Yes I have been told relations are not stable over time, but I found this really is a general rule and some relations are very stable (10+ years) but it probably depends on how the local community treats relations, so they really are not 100 % stable.
So I probably want to run a query for A1 with some tags (network=BAB, ref="A 4"?) and highlight the result on a map. My point in using relations is that they are probably much (computationally) cheaper to retrieve from the server then a query, so I try to use them where possible. I see that the [Query-to-map][3] [Query-to-map][4] at http://tools.wmflabs.org/query2map which may be what I am looking for is not working (503 Service Unavailable).
I actually want to use the map data (A1 route) to share it on Wikipedia. There is the [WIWOSM][4] [WIWOSM][5] project that would work but the problem is it is not universal (not enabled on all Wikipedias - rather very few) and the articles need to contain coordinates in order for the WIWOSM link to be showed at the top of the page. And the articles about routes (Autobahns, railway lines etc.) usually do not contain any cooordinate so the WIWOSM link is not shown.
[1]: https://www.openstreetmap.org/relation/48147
[2]: https://www.openstreetmap.org/relation/20904
[3]: https://help.openstreetmap.org/questions/7468
[4]: https://wiki.openstreetmap.org/wiki/Query-to-map
[4]: [5]: https://wiki.openstreetmap.org/wiki/WIWOSM