Routing error

[Percherie OnDaNet]

Hi, I see that the approach of some intersection between a primary and a secondary road route, and that is to stay on the primary route, there is a need in some cases as indicated:

  - Keep left

  - Turn slightly right.

Intersections that are built with primary_link secondary_link or tag does not seem to be a problem.

I contacted the OSM community in my country and the answer is a software must pass this tag * _link for a successful routing.

Is that just erreurr data or software?

Here are some examples:

En roulant sur la D 6113 en allant vers l'Est "tournez légèrement à gauche"

http://osm.org/go/xVO8a8khB?m=

En roulant sur la D 610 en allant vers le Sud "tourner légèrement à gauche"

http://osm.org/go/xVPoLMdbY?m=

http://osm.org/go/xVO1BiYVy?m=

Pour aider pour l'algorithme, voici des intersections sans problème :

http://osm.org/go/xVPot31uA-?m=

http://osm.org/go/xVPot1ulQ-?m=

http://osm.org/go/xVPqSGeor?m= (avec utilisation d'un link)

http://osm.org/go/xVPqz9ldb?m= (route trop petite)

[dona...@gmail.com]

i have same problem here 

i join the gpx track.

the problem appear on road intersection too ! , osmand want to pass from highway to normal road by a "u-turn" , impossible to doing it in reality.

is there a issue ?

thanks

[dona...@gmail.com]

i add more detail

in blue , this is the ggmaps and in red the orad that osmand want to take .

the problem seems to appear with precise mode too (last build)

[Peter B]

I suppose there should be a traffic_sign before the crossing where the red arrow starts, in direction north-west:
restriction=only_straight_on
This is in reality no question, that you should not turn, but in database there WAS no restriction.
I added the restriction
http://www.openstreetmap.org/browse/changeset/18471214
(this is my first restriction of such kind, if anybody could check it please..., thank you)

Peter

[Max]

Hello Peter!

I added the restriction
http://www.openstreetmap.org/browse/changeset/18471214
(this is my first restriction of such kind, if anybody could check it please..., thank you)

Checked, it is ok.

Regards,
Max

[Gad.Jo]

The problem I described is slightly different.

It seems that OsmAnd adds unnecessary navigation information to the intersection approach between a major road and minor road.

I'd like to know if this is a problem from OSM data or proposed routing?

2013/10/24 Max <openstre...@nurfuerspam.de>

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[Max]

I don't think it is an OSM data issue.

I am amazed, that there is an announcement:
http://osm.org/go/xVO1BiYVy?m=

But here is no announcement:
http://osm.org/go/xVPot1ulQ-?m=

Both cases:
primary -> tertiary

Maybe different angle?

Regards,
Max

[sympa]

I assume the announcement is for going right to left in both cases.

In the first case, one gets onto a different road: a different way and a different road name. I'd expect an announcement for taking the ramp.

In the second case, one also gets onto a different way. However, coming from the right on D610 and turning right on D606 you've just crossed a bridge. That bridge is a different way in OSM and it ends very nearly in front of the right turn. And perhaps that is the cause of the confusion/bug?



Op donderdag 24 oktober 2013 13:00:47 UTC+2 schreef Max:

[Gad.Jo]

I do not think the bridge there is a few thing as the previous intersection http://osm.org/go/xVPot31uA-?m= is exactly the same case: no additional indication "turn slightly to the right"

I guess it just the angle formed by the two roads. This disrupts the driver who wants to stay on the main road.

Because of this kind of information supperflux I happened to leave the main road to turn unnecessarily left or right because of a guide "turn slightly to the right" (or left)

One solution would be to use secondary_link or tertiary_link but it really matches to reality and back to use tag for rendering graphics or guidance. Is it possible to submit a proposal to improve guidance for such cases?

2013/10/24 sympa <echte...@gmail.com>