[OSM-newbies] Bollard Barriers at T junctions

[Jonathan Bennett]

Dave F. wrote:

> One of the roads has bollards barriers forcing cars to turn 90 degrees 
> down the other road, but still allowing cyclists/pedestrians to continue 
> straight on.
> 
> In the render the barrier's graphic appears directly on the T, making it 
> unclear which is barricaded. If  I separate that one it implies that 
> there's no access at all & if It place a footway/cyclway it's too short 
> to render clearly.

The answer to modelling the junction correctly is to use a turn
restriction relation, which will allow you to specify just which types
of traffic have to follow which restrictions. In your case you would
need to create a relation tagged something like the following:

type=restriction
restriction=only_left_turn
except=bicycle

With the members:

from=<road facing bollards>
via=<junction node>
to=<road you're forced to turn into>


This won't show up on the map at the moment, but don't worry about that
-- it's the fault of the renderer, which will catch up eventually.


-- 
Jonathan (Jonobennett)