[OSM-talk] trunk_link & ref=*

[Lennard]

Cartinus wrote:

> We (should) map what is there. So the real question is: Do sliproads between 
> trunk roads actually have a ref in the real world?
> 
> If I'm not mistaken, then they don't have one around here (the Netherlands).

They do, at least between motorways. They are usually numbered the same 
as one of the motorways they connect to, followed by a letter. One of 
the reasons being that if something happens there, you don't have to 
explain emergency services where you came from and where you were going, 
but can just tell them the ref on the nearest marker. Say where the 
motorway has ref=A16, the motorway_link may be numbered ref=A16f.

In Belgium, they can have refs too, but they seem to be a longer 
(internal?) version of the numbering scheme. For example, a 
motorway_link onto the R1 can have a ref of R001.427.

Personally, I don't think these should be rendered on the main maps, and 
they should not be made up by us if there is no real ref on the ground.

-- 
Lennard