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[mkgmap-dev] question about ignored no_u_turn restriction

From Ben Konrath ben at bagu.org on Sun Jul 5 14:53:50 BST 2015

Hi Thorsten,

Thanks for your reply. This type of restriction is probably a country
specific thing. In Ontario Canada, you can make u-turns at intersections
(regardless of the road is separation) if there is no sign indicating that
you can't make the u-turn. Here's the information directly from the Ontario
Ministry of Transportation:


I realize that the link I sent previously is in the US but I suspect that
it's the same policy there which is why the restriction is tagged like it

Since the tagging seems to be valid, does the Garmin format support this
type of restriction? If not then it's probably a good idea to indicate this
in the warning message. Maybe the message should also be changed to an info
message if there's no problem with the data. Does anybody have other

Thanks, Ben

On Sun, Jul 5, 2015 at 2:47 PM, Thorsten Kukuk <kukuk at suse.de> wrote:

> On Sun, Jul 05, Ben Konrath wrote:
> > Does anybody know why this particular restriction is being ignored?
> Beside that this particular type of restrictions doesn't make
> any sense to me, I would guess the GARMIN format does not support it.
> If the to and from ways are the same, I have never seen a sign forbidding
> u-turns. Only, if you have two ways, structural seperated. But then I
> should tag the street that way and the restriction will not be ignored.
>   Thorsten
> --
> Thorsten Kukuk, Senior Architect SLES & Common Code Base
> SUSE LINUX GmbH, Maxfeldstr. 5, 90409 Nuernberg, Germany
> GF: Felix Imendörffer, Jane Smithard, Dilip Upmanyu, Graham Norton, HRB
> 21284 (AG Nürnberg)
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