I ran into the tactile_paving key, and I'd like to map tactile_paving=incorrect as I ran across it. However, I am not always sure whether a particular paving is correct or not.

I have two questions:

  1. I encounter tactile pavings most often in front of crosswalks at intersections. How can I tell, by looking at the paving on the ground, whether it is incorrect? What are the criteria?
  2. The other day I was at a T junction, with roads heading south, west, and east. (The roads were undivided.) The south-east corner of the junction had crosswalks going north and west; a single, "dots" paving along the rounded corner in the sidewalk in a 90-degree arc; and a "lines" paving pointing northwest. Should that paving be marked "incorrect"? The "lines" pavings are normally aligned with the crosswalk, but in this case they don't point to either crosswalk but directly into the intersection (into traffic).

asked 18 Jul '17, 14:33

dsh4's gravatar image

dsh4
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accept rate: 4%

Not an answer, but might be helpful: Taginfo and overpass can be used to see where people have used this tag https://taginfo.openstreetmap.org/tags/tactile_paving=incorrect . One example https://www.openstreetmap.org/node/368241625 shows that someone's added notes explaining why the paving is incorrect here.

(18 Jul '17, 15:09) SomeoneElse ♦

Thanks, good suggestion.

(18 Jul '17, 16:09) dsh4

It's when tactile paving has been laid down but gives wrong information for various reasons.

Once you understand how blind people use tactile paving (there's actual standardized nuanced meaning involved, it's not just a general warning sign), you can spot common problems. For example the layout of the sidewalk has changed and the tactile paving's message is out of sync. Or a sewer plaque with tactile paving on top has been put back at the wrong angle. Or tactile paving is used decoratively, pleasing the seeing and unknowingly endangering the blind.

See tactile_paving=* and osm for the blind.

permanent link

answered 18 Jul '17, 15:53

Vincent%20de%20Phily's gravatar image

Vincent de P... ♦
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accept rate: 19%

1

The sewer and decorative examples are clear, but regarding the 'out of sync' example, how do I tell whether the tactile paving is out of sync with the layout of the sidewalk? The "OSM for the Blind" page, while helpful, doesn't answer this question.

(18 Jul '17, 16:08) dsh4
1

For example a sidewalk could have been widened, or a highway_crossing moved, but tactile paving remains at the original location. Or a new signpost has been planted, without updating the paving to guide around it.

Most people (including road workers) have little clue of how tactile paving works. Most online documents describing tactile paving rules are big and obtuse, designed for the planning engineer and not the pavement user.

(18 Jul '17, 19:00) Vincent de P... ♦
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question asked: 18 Jul '17, 14:33

question was seen: 718 times

last updated: 18 Jul '17, 19:00

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