Please keep in mind that in many cases the L-numbers are not
signposted yet.


So we need the personal decision based on routability and width (!)
as well as the number-based approach.

Also a higher-numbered L-road might be resurfaced and widened, e.g.
to give access to a new development while maintaining the same number.

I therefore think personal judgement of the mapper about the suitability
of the road is more important than the L-numbers.

I would also prefer not to make the OSM wiki page too complicated
for the newbie by distinguishing the OSM-classification vs.
the L-subclassifaction. I.e. the Local Primary/Secondary/Tertiary roads
would confuse the newbie because of terminology overload.

Tom

Andrew McCarthy carefully composed this message, on 2010-03-15 12:59:
> On Mon, Mar 15, 2010 at 09:57:01AM +0000, Dermot McNally wrote:
>> Hi,
>>
>> I agree that a reform is merited, and I think that most of your
>> changes are sound.
>>
>> One, I think, should be reworded:
>>
>> On 15 March 2010 09:03, Andrew McCarthy<[email protected]>  wrote:
>>
>>> Proposed:
>>>         Local "L" roads whose importance for through traffic is quite
>>>         high. This can be the case both in urban and rural areas. The
>>>         choice of applying "tertiary" or "unclassified" in Ireland is
>>>         subjectively chosen by you, the mapper.
>>
>> I think the subjective element is overstated. I also think that the
>> known subdivisions of local roads by importance can help us:
>>
>> http://en.wikipedia.org/wiki/Local_Roads_in_Ireland#Local_Road_numbering
>
> Ah, had completely forgotten about that.
>
>> My suggestion is that we reproduce the details of the 3 types of local
>> road and suggest that the Local Primary and Local Tertiary roads be
>> tagged as tertiary and unclassified respectively. For the local
>> secondaries we could suggest one of two approaches:
>>
>> 1. Pick either tertiary or unclassified. Drawback is that I'm guessing
>> we have insufficient information to help us judge now which to
>> suggest.
>>
>> 2. Fall back to "mapper's choice" based on significance for through traffic.
>
> I think that, until we know more L-numbers and get a feel for them, the
> latter is more appropriate. It's easy, as you say, to automatically
> convert them to a particular choice at a later date if we want.
>
> I'll have a go at incorporating your wording about primary/secondary/
> tertiary along with L roads of unknown ranking into the existing layout
> of the highway pages.
>
> Cheers,
>
> Andrew


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