Hi Marko, okay, if I hear no complains I'll merge it tomorrow. Gerd
Date: Wed, 9 Apr 2014 14:18:10 +0300 From: marko.makela@iki.fi To: mkgmap-dev@lists.mkgmap.org.uk Subject: Re: [mkgmap-dev] r3174 in via_ways branch
On Tue, Apr 08, 2014 at 08:46:34AM +0200, Gerd Petermann wrote:
I think the branch is ready for trunk now.
Me too. While I did not test routing, it seems that you did that on behalf for me (in Finland). I checked the warning messages, and I think that they all are clear and warranted now.
I did a few more tests regarding turn restrictions with via ways. It seems that they are working, but the effect is minimal. In Finland, they are (now) used only in no_u_turn restrictions, and the Garmin algo seems to avoid these u-turns anyway if alternatives are available.
I guess that the impact is bigger in places like California, where they have dual oneways and they only allow left-turns and U-turns in certain intersections. Then it is common that you will have to drive slightly past your destination, make a U-turn a few intersections later, and then make a right-turn.
I have not checked the mapping detail in those areas. If these dual-oneways are already mapped as such in OSM (instead of being mapped as one two-way street), no turn restrictions would be needed.
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