[Talk-us] Am I mapping this wrong, or should the router be fixed for this?

[James Mast]

Well, the problem here is, that even though OSMAnd says 'make a U-Turn', vshcherb says the following about it:

>>>>> 
Technically this is not U-Turn, cause it goes to another OSM way. 
U-Turn when you get back to the same road, because most of the roads are
 drawn as 2 ways, that's why U-Turn is just a turn on the different 
street. 


There is no penalty based on the sharpeness of the turn, cause there 
is no clear algorithm to say how much sharp turn is and what is the 
penalty. 

>>>>>


You can see the rest of his response to this at the GitHub ticket: https://github.com/osmandapp/Osmand/issues/1501


-James


> To: talk-us at openstreetmap.org
> From: niceman at att.net
> Date: Mon, 27 Jul 2015 13:20:50 -0400
> Subject: Re: [Talk-us] Am I mapping this wrong, or should the router be fixed for this?
> 
> 
> 
> > 2) There should be some cost in a routing engine for making a u-turn so
> > as to discourage such routes even if there was an extra set of signals.
> > Making a u-turn does take time (one can not go from the posted speed
> > limit in one direction to the posted speed limit in the other direction
> > instantly). The presence of other traffic in the opposing directly would
> > add further to the time needed to make a u-turn as one would have to
> > wait for an opening.
> 
>    I agree that the cost of a U-turn is not high enough if it is less 
> than a shorter route via traffic signal.
> 
> _______________________________________________
> Talk-us mailing list
> Talk-us at openstreetmap.org
> https://lists.openstreetmap.org/listinfo/talk-us
 		 	   		  
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.openstreetmap.org/pipermail/talk-us/attachments/20150728/ca00fc5d/attachment.html>