Hi,
By looking at the EV19, I noticed the following:
- At zoom level 8 (https://cycle.travel/map?lat=48.8231&lon=6.8665&zoom=8) it looks like the veloroute stops at some point.
- At zoom level 11 (https://cycle.travel/map?lat=49.5791&lon=5.1169&zoom=11) we can see that indeed, it changes from National to Regional a bit south east of Sedan.
- When looking at the OSM objects, it seems that it comes from the fact that the superroute "EuroVelo 19 - The Meuse Bicycle Route" (OSM relation 7298586) includes a regional one ("Voie verte Trans-Ardennes", OSM relation 370404) starting from this point (rather than road segments).
While they are both displayed when zooming in (level 16, we can see "TA" & "19": https://cycle.travel/map?lat=49.6545&lon=4.9946&zoom=16), which means cycle.travel manages to know that there is a Regional and a National route here, it might be interesting to keep the National key at smaller zoom levels to ensure consistency along the way of this long EuroVelo route.
I'm not sure I'm making myself clear here, don't hesitate if you need more info.
To make it simpler: it would be nice to see the EV19 full length when zooming out.
Cheers and thanks for the great work,
Florent.