Hi Andrew,
A couple of days ago I updated this intersection to remove a couple of
short ways, merge some ways, and update the turn restrictions. There
should now be only one ways to negotiate the intersection from any entry
to exit. This may explain why online directions are working, while
OsmAnd may be using older data.
I haven't see a response to my question of when to use multiple lanes or
separate ways. In this intersection there are small plastic obstructions
between lanes. I can see arguments for modelling them either way. For a
picture of these see
https://www.mapillary.com/app/?lat=-37.794368611389&lng=145.24075834056&z=17&pKey=1146194895843889&focus=photo
<https://www.mapillary.com/app/?lat=-37.794368611389&lng=145.24075834056&z=17&pKey=1146194895843889&focus=photo>
Regards,
Kim
On 21/9/21 6:54 pm, Andrew Davidson wrote:
On 18/9/21 9:04 pm, Kim Oldfield via Talk-au wrote:
Andrew, are you familiar with this intersection from travelling
through it?
No, and it may be some time before I could visit in person :-(
I came across this one because it had a broken turn restriction. Based
on what had been mapped I assumed that someone was trying to give lane
guidance. This is just a standard roundabout except for the fact that
you need to be in the left lane to turn left on some of the arms.
OSRM and Graphhopper will give you correct directions (ie take the nth
exit on the roundabout) but OSMAnd fails to notice you are going to
drive through a roundabout. The first two routers are getting the
correct answer by accident because the fake slip roads have been
tagged as _link, as a result the router prefer to follow the main road
into the roundabout.
It had occurred to me that the same outcome (lane guidance) could now
be given using turn and change tagging.
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