[Openstreetmap] How to draw complex roads?

[frank]

Petter Reinholdtsen wrote:
> When drawing Oslo, I ran into a few problems.
> 
> How should I draw complex roads?  The city have roads in multiple
> levels (for example main road in tunnel and crossing on the surface),
> and I have no way to document the relative elevation of a road.  Any
> idea how I should handle this?
> 
> ...
> 
>          A
>          |        _
>     -<---+-------+ \
>   D              |C +--<->-
>     ->---+-------+_/
>          |
>          B
> 
> ...

i saved those roads as two one-way roads like D [East], D [West]
with intersections like (not in your image) D [West] -> B

frank

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