Turntables and traversers are not automatically imported as areas

[JonathanBittner]

A closed way tagged as railway=turntable or railway=traverser is not automatically recognized as a polygon and the turntable rendering (shading) is not applied. If it's tagged area=yes or some other tag that indicates an area (ex. tourism=attraction, https://www.openrailwaymap.org/?style=standard&lat=40.87484646450063&lon=-73.52816417813301&zoom=19) it will render.

Possible solution: modify the lua script (setup/openstreetmap-carto.lua) to include railway = {turntable = true, traverser = true} inlocal polygon_values

Potential issues:

• Does this mess up single nodes that are tagged as turntables?
• While our repositories aren't linked, setup/openstreetmap-carto.lua is an exact copy of OpenStreetMap's file. Is it advantageous to be in sync? Should the change be proposed upstream?

[DerDakon]

I guess this would also affect e.g. signal boxes, but those are usually also tagged as buildings. For none of them it makes IMHO sense to render them not as areas.