[Tagging] [Talk-us] Freeway exit tagging

Jack Burke burkejf3 at gmail.com
Mon Aug 29 19:05:41 UTC 2016


> This exit has no turn lane. There is no staging lane prior to the exit
where tags could be placed, one should not be created just so that there is
a place to put tags.
> This freeway should not be split. You said yourself that the exit is not
part of the freeway itself, so tags should not be placed on the freeway.

That's not entirely true.  The exit ramp technically begins in the middle
of the far-right travel lane.  If you were to imagine the highway as a
train track instead, the exit ramp would have to physically connect to the
rail in the lane.  The same concept applies here, and although I've never
actually asked one, I'll bet a highway engineer would agree.


On Fri, Aug 26, 2016 at 12:06 AM, David Mease <meased3 at gmail.com> wrote:

> My interpretation:
>
> What is the proper method to use turn:lanes to tag freeway lanes
>>> approaching an exit, where the exit branches directly from an edge lane
>>> without being part of the freeway itself, but the freeway lanes are not
>>> signed with an arrow, such as this one?
>>>  http://mapillary.com/map/im/7igAGXSa6EsUYlTIujXchw
>>>
>>
> This exit has no turn lane. There is no staging lane prior to the exit
> where tags could be placed, one should not be created just so that there is
> a place to put tags. This freeway should not be split. You said yourself
> that the exit is not part of the freeway itself, so tags should not be
> placed on the freeway. This intersection is a candidate for the destination
> tag.
>
>
>> mapping the road markings seems extremely strange - what if they are very
>> faded, when do we map them ? is there a threshold of % of the paint left ?
>>
> what is there are no road markings but there are signs ?
>>
>
> Same difference. But the arrow in the above example is pointing to where
> the exit is, not describing a turn lane preceding the exit.
>
>
>> do we remove those tags during the winter in some regions ?
>>
>
> Do we remove the name tag from roads when the street signs get iced over
> or overgrown with vegetation?
>
> mapping of markings separately also seems to have no functional benefit.
>> the information should be useful for navigation
>
>
> Road markings are both beneficial and useful for navigation. Cities and
> governments have paid a lot of money installing them all over globe
> precisely for these reasons. OSM would be well served to include them
> exactly as is. I don't hear a lot of people complaining about how those
> arrows on the roads led them astray.
>
> In the above example, I would not expect navigation software to direct me
> to get into the lane marked with a slight right arrow. In fact, I would be
> miffed when I found there was no such lane. All I would expect is a simple
> "In x distance take exit 78 towards Sycamore/Ocilla"
>
>
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