[Tagging] lanes tag dispute

Toby Murray toby.murray at gmail.com
Sun Sep 18 19:19:09 BST 2011

My take on lanes is that it should be the number of continuous lanes
along a road. This impacts traffic flow and road capacity which allows
routers to make more informed decisions. Turning lanes don't increase
overall road capacity. Rather, they prevent it from dropping at busy
intersections. As such, I do not split and tag ways where turning
lanes are. I could see turning lanes being useful information though
but lumping them in with the total lane count actually obscures
information. I would rather see them tagged with lanes:turning:left=1
or something like that. That way you know exactly what is happening
and routers could easily say "get in the left turning lane.


On Sun, Sep 18, 2011 at 1:10 PM, Nathan Edgars II <neroute2 at gmail.com> wrote:
> On 9/18/2011 2:07 PM, Anthony wrote:
>> On Sun, Sep 18, 2011 at 2:01 PM, Nathan Edgars II<neroute2 at gmail.com>
>>  wrote:
>>> On 9/18/2011 2:00 PM, Anthony wrote:
>>>> The way is supposed to follow the angled dashed lines.
>>> I thought the way was "supposed" to be in the center between the edge
>>> lines.
>>> Which is it?
>> I never mentioned edge lines.  There generally aren't any edge lines
>> in an intersection, are there?
>> The way is supposed to be in the center of the lanes.  So if lanes=2,
>> it would be on the dashed line.  If lanes=3, it would be between the
>> two dashed lines.
> And if lanes suddenly jumps from 2 to 3, then what?
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