It would be nice if these "rond-points" would be explicitly tagged (e.g.
junction=rond_point???) so mkgmap can still easily be taught to
recognise it and treat it as a roundabout even if it doesn't comply with
the OSM semantics for one. Otherwise your satnav will tell you to turn
right at the junction, even if you want to turn left {driving on the
right}. I am concerned here about usability of the data, particularly
for routing.
Colin
On 15/05/2012 22:18, Pieren wrote:
On Tue, May 15, 2012 at 8:13 PM, Philip Barnes<[email protected]> wrote:
2) entering traffic must yield; and
Not always. In France there are still a few where traffic on the
roundabout gives way to traffic joining the roundabout. Isn't the Arc De
Triomphe the most famous 'old style'.
Basically such 'old style' junction called "rond-point" shouldn't be
tagged with junction=roundabout ([1]). By chance, we only have very
few of them (different priority/right of way), mostly in Paris. Only
signed roundabouts (called "carrefour giratoire")(yield [2]) should be
tagged as such ([2]).
Pieren
[1] http://wiki.openstreetmap.org/wiki/FR:Tag:junction%3Droundabout
[2] http://wiki.openstreetmap.org/w/images/0/02/Fr-AB25-sens_giratoire.gif
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