Trying to understand your question, the way in your example is tagged:
destination Troy
destination:ref I 787 North
From the data consumer perspective, such tagging will generate a navigation
instruction:
"turn slightly right towards Troy, I 787 North". This would be helpful as long
as the driver
is able to recognise it on the local signposting.
What is written on the sign at this junction? If "North" is mentioned there I
would be
happy enough with the tagging above.
I have seen the compass direction quite often signposted on major roads in the
US,
thus the question boils down if it is considered to be part of the 'ref'.
A general tag for the compass direction is 'direction', which is used 79% (shy
of 1 mill
times) on highways.
So for the interstate itself, splitting it into ref=I 787 and direction=N would
be preferable.
tom
On 16.12.2020 04:40, Skyler Hawthorne wrote:
I've seen a few examples in both New York and California put in the tags of on-ramps the
destination:ref that has the direction in it, e.g.: https://www.openstreetmap.org/way/5566969
However, after looking through the wiki, to my surprise, I cannot find this practice mentioned
anywhere. It made sense to me when I saw it because how else is GPS navigation supposed to tell you
which highway to get onto? But I don't see it mentioned anywhere, and in fact, the only thing the
wiki page on Highway Directions in the United States mentions is putting the direction on the ways
of the actual freeway.
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