railway=construction is more prominent than railway=subway

[daganzdaanda]

At this node https://www.openstreetmap.org/node/1712550942 a way with
railway=construction
construction=subway
splits away from a way with
railway=subway

The subway under construction is more visible than the finished one (which is mistagged, it's not finished in reality...)

This is a very minor issue, imho.
But could we use the construction=* key to make a difference between the type of railway that is being constructed? We do make that difference with highways - and there it does make sense, while it could be too much for railways I believe.

So maybe it would suffice to make all railway=construction the same grey as railway=subway or even lighter? Then above-ground railway construction would be less visible, but that's OK for me for this style.

[kocio-pl]

But could we use the construction=* key to make a difference between the type of railway that is being constructed?

Of course, we could, but we need a proposition how to visualize it and someone to prepare the code. Do you like to try it?