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On 2012-09-17 16:57, David ``Smith'' wrote :
<blockquote
cite="mid:CACZmtRNR2PJ0siE=c3_Z9fWaDcxiOy4m2u4hr6CtESLbs5VTKA@mail.gmail.com"
type="cite">Excuse me if I don't understand the situation
entirely, but I think the problem is the actual access restriction
or enforcement of it is different from a literal reading of the
signs. This must be the case if the signs don't give adequate
information to completely describe the restriction. In that case,
do your best to determine the actual restriction as it is enforced
and map accordingly.</blockquote>
I gave extra info showing that this sign is more a fight shield that
a road sign.<br>
But OSM must not inform readers of what road signs should be but of
what they are.<br>
In everybody's mind, access restrictions is to an area because it
reflects the places they can't reach.<br>
But the legal terms say that C23 is a signal you can't pass, one
way, that's all.<br>
That's a node sign.<br>
<blockquote
cite="mid:CACZmtRNR2PJ0siE=c3_Z9fWaDcxiOy4m2u4hr6CtESLbs5VTKA@mail.gmail.com"
type="cite">
Access restriction tags on nodes should work fine for routers, but
remember if the node is an intersection, the access tags apply to
all movement through the intersection, and you probably want to
avoid that. Also, such restrictions are less commonly visible on
rendered maps; for this reason I prefer to put access tags on ways
if reality can be accurately modelled that way.
<br>
On the other hand, if the restriction exists at a point not at an
intersection and only for one direction of travel, I would have to
split the way there and make a no_straight_on turn restriction
relation with except= or for= tagging to indicate what vehicles
are or are not prohibited.
<br>
Also, if a road does not permit passage of vehicles unless it's
the only choice (such as going to or from that road or a side
street with no other outlet) then remember access=destination (or
hgv=destination, or whatever else might apply) is something we can
do.
<br>
</blockquote>
And if you want to make it a way restriction, that's up to the point
where other users could not see the signal. Over 50m in this
example !!!<br>
<br>
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<td valign="top">André.</td>
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