Decrease shield road (and route)

[Florimondable]

https://www.cyclosm.org/#map=11/49.6970/4.1968/cyclosm
too big, too colorfull, only big roads, minor roads could have shield also

[Florimondable]

can be done also on cycle routes in high zoom, there shields are much more visible than the transparent route.

[Florimondable]

For roads I think we should remove shields, they are ok when you want to follow main road but on a bike it is the opposite you prefer to avoid them, so it is better to render road ref for more roads but smaller. So just render the ref along the road as do IGN or OTM for instance.
Here a try :

I think we should also render ref/name of track/path, they can be usefull for people on MTB/Trekking/Tourism.

I also found that there is some cleaning to do in the road name layer.