> IMO, mkgmap should not silently ignore anything. We should generate a
> warning too.
>
> BTW, one more case that I do not know if you are handling yet: Issue a
> warning if the result would not be any different if the turn restriction
> did not exist. This is not only about oneway direction. For example, if
> there is only_straight_on on a road with no junction, a warning should
> be issued.

Sure, whenever a restriction is ignored there should be a reasonable explanation.

>
> BTW, I accidentally loaded a relation somewhere in Russia and downloaded
> the surroundings. There were lots of no_u_turn on every crossing of a
> major road. That kind of micro-mapping does not exist over here; I guess
> that mappers expect people to apply common sense and not make a u-turn
> as soon as the navigator suggests it, no matter what.
>
> I think that no_u_turn restrictions are somewhat a matter of a local
> convention. In the US it is common to forbid left turns and U-turns
> except in a few junctions. In Finland, that practice only exists on some
> major through-routes in cities.

AFAIK   we have no no_u_turn restrictions in Germany, so for me they all look obsolete ;-)

Gerd