Changeset: 114125647
Added curbs and bollard rows separating frontage lane from through lanes on 11th
Closed by Minh Nguyen
Tags
changesets_count | 23733 |
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created_by | iD 2.20.2 |
host | https://www.openstreetmap.org/edit |
imagery_used | Bing aerial imagery;Mapillary Images |
locale | vi |
source | ;streetlevel imagery;mapillary |
Discussion
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Comment from b-jazz
I'm guessing these aren't really curbs, but more appropriately very short walls, right? The fact that the way doubles back on itself (ie. nodes A-B-A) leads me to think this was done on purpose to indicate it is "lower" on both sides. But this triggers various Q/A tools like OSM Inspector since that is invalid topology (as I understand it). So wouldn't a wall be more appropriate here? Or maybe there's another way to keep the Q/A tools happy?
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Comment from Minh Nguyen
They’re more like curbs than walls, hence the kerb:height=6" tags. They’re tapered so that emergency vehicles and delivery vans can back in directly from the through lanes. Here’s what they look like on the ground:
It’s awkward because barrier=kerb was defined with the assumption that a curb separates a sidewalk from the street, oblivious to this kind of divider. There’s some additional discussion on this topic on the wiki:
https://wiki.openstreetmap.org/wiki/Talk:Key:kerb#.22Double_sided.22_kerbs
Maybe it would be better to add a tag indicating that it’s double-sided?
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Comment from b-jazz
A double sided tag seems like the right answer to me. In the meantime, maybe they can be represented with parallel lines separated by a small distance?
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Comment from Minh Nguyen
Parallel lines would represent these standalone curbs too similarly to curbs that surround a traffic island, but anyways Bing imagery doesn’t have high enough resolution to distinguish the gaps in the curbs that allow stormwater to pass through, let alone the edges of the curbs.
In changeset 114597028, I split up the ways so that they don’t double back on themselves. That should satisfy any validator for topology, though there are still coincident curbs.
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