It seems to me that the key attribute of the 'climbing lane' situation
that Dave mentions is that it's an additional lane. It's provided for
slow-moving vehicles, sure, but that's really a special case of the
near-universal convention that slow-moving traffic gives way to
overtaking traffic by moving to the outside (that is, in North
America, to the right). The difference, at least where I am, between a
climbing lane and another ordinary lane is a subtle one: you don't
have to move to the outside if nobody's trying to overtake, rather
than a "keep right except to pass" rule. You get 90% of the way there
by simply having the correct number of lanes:forward and
lanes:backward. Is adding a lane that much more complicated than
drawing a parallel way?
On Mon, Sep 10, 2018 at 11:31 AM Joseph Eisenberg
<[email protected]> wrote:
>
> I'd say that it would be better to leave them unmapped than to incorrectly 
> map them as separate service roads.
> If they are only divided by a single painted line, they are just lanes, not a 
> separate roadway.
> And it's not too difficult to split the way twice and paste on a couple of 
> tags
>
> On Mon, Sep 10, 2018 at 10:17 PM Dave Swarthout <[email protected]> 
> wrote:
>>
>> Wow, thanks for the help, Markus. I really appreciate it.
>>
>> But I must say, if I have to use that method to tag all the turnouts on the 
>> Sterling Highway, I'm going to leave them unmapped. Life is too short and 
>> there is a lot of other mapping yet to do in Alaska.
>>
>> Although these lanes are not physically separated by a barrier other than a 
>> painted line, I'm going to opt for the service road scenario. It is simple, 
>> much, much less error prone to map, and IMHO, would do the job better than 
>> the lanes technique.
>>
>> Thanks to all,
>>
>> Dave
>>
>> On Mon, Sep 10, 2018 at 6:51 PM SelfishSeahorse <[email protected]> 
>> wrote:
>>>
>>> On Mon, 10 Sep 2018 at 11:17, Dave Swarthout <[email protected]> 
>>> wrote:
>>> > I'm still not convinced the lanes:smv tagging scenario is the best 
>>> > solution but were I to change my mind, how would I tag my turnouts?  Here 
>>> > is another screen shot of the particular section of highway with a 
>>> > turnout on both sides of the road that I've been discussing (59.752103, 
>>> > -151.766395 ) with the ways removed for clarity: 
>>> > https://www.dropbox.com/s/nm6iahw9ch79tuh/slow_vehicle_turnout.jpg?dl=0
>>>
>>> I would probably split the road at every place where an additional
>>> lane begins or ends, i.e. four times, and would tag the sections as
>>> follows from right to left (this is the direction of the highway way):
>>>
>>> lanes=2
>>>
>>> lanes=3
>>> lanes:forward=2
>>> lanes:backward=1
>>> smv:lanes:forward=|designated
>>> overtaking:lanes:forward=yes|no
>>>
>>> lanes=4
>>> lanes:forward=2
>>> lanes:backward=2
>>> smv:lanes:forward=|designated
>>> smv:lanes:backward=|designated
>>> overtaking:lanes:forward=yes|no
>>> overtaking:lanes:backward=yes|no
>>>
>>> lanes=3
>>> lanes:forward=1
>>> lanes:backward=2
>>> smv:lanes:backward=|designated
>>> overtaking:lanes:backward=yes|no
>>>
>>> lanes=2
>>>
>>> In case the turnouts were separated by a barrier, i think your idea
>>> with highway=service + service=slow_vehicle_turnout would make sense.
>>>
>>> Regards
>>> Markus
>>
>>
>>
>> --
>> Dave Swarthout
>> Homer, Alaska
>> Chiang Mai, Thailand
>> Travel Blog at http://dswarthout.blogspot.com
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