[Potlatch-dev] [OpenStreetMap] #3567: Add ability to create a no_u_turn restriction with a way "via"

[Ed Loach]

>  Can you point us to an example of this kind of intersection
> somewhere? I'm
>  having trouble picturing it.

I imagined something like a dual carriageway with a crossing way, where you can turn onto the crossing way but not then turn again onto the other carriageway of the dual carriageway, but if you were originally on the crossing way you can turn onto that carriageway so can't do it using no_left_turn/no_right_turn restrictions (depending on which side of the road you drive).

So from way would be dual carriageway way 'a'
Via way would be the section of crossing way between the dual carriageway ways 'a' and 'b'
And to way would be dual carriageway way 'b'

Does that make sense? It not I'll try and draw a diagram. I think there are some junctions like this on the A4123 between Wolverhampton and Birmingham, but it's been a while since I drove down there.

Ed