[Tagging] highway=motorway and motorroad (implies)

[fly]

Hi

I think it would be better to tag motorway with motorroad and oneway yes and
stip of all the implied tag.

1. I know some motorways which are not oneway.
2. Right now your are not allowed to ride with a motorcycle on motorways, as
long as it is not tagged seperatly !
3. Maybe your are allowed to use a  motorways by foot or bicycle ?

Maybe surface=paved is ok, but there are many different surface=*.