[Tagging] Non-orthogonal crossing=* tag proposals: crossing=marked/unmarked vs crossing:markings=yes/no

[osm.tagging at thorsten.engler.id.au]

From: Warin <61sundowner at gmail.com> 
Sent: Saturday, 25 May 2019 09:49
To: tagging at openstreetmap.org
Subject: Re: [Tagging] Non-orthogonal crossing=* tag proposals: crossing=marked/unmarked vs crossing:markings=yes/no

 

On 25/05/19 07:32, Paul Allen wrote:

On Fri, 24 May 2019 at 22:12, Kevin Kenny <kevin.b.kenny at gmail.com <mailto:kevin.b.kenny at gmail.com> > wrote:


Yeah, there really are combinations around here:

does it have signs?
does it have traffic signals?
does it have specific pedestrian-facing traffic signals? (Some
intersections just have you cross at the same time as motor traffic in
your direction rolls)
are the traffic signals pedestrian- or cyclist-controlled? (Is there a
button for you to push?)
does it have pavement markings?


We also have;
tactile paving - a sequence of small raised bumps/dots on the paving that can be sensed by walkers/wheelchairs
audio warning - the button also has an audio output that signals when the traffic lights state to allow pedestrian crossing, and just before the pedestrian crossing closes.



And none of that matters for the broad classification that the crossing=* key does, which is:

 

*	You can’t cross here

 

*	You can cross here, but there is no special legal status to it

 

*	You can cross here, and it is a designated crossing place with some kind of special legal status (that in most jurisdictions prioritizes pedestrians over vehicles, specifics depend on local jurisdiction)

 

*	You can cross here, and there is a traffic signal that tells you exactly when you can and can’t cross that you have to follow

 

The labels chosen for these 4 categories are : no, unmarked, uncontrolled, traffic_signals. But they may as well have been a, b, c, d. Don’t try to interpret anything more into the label.

 

These are the 4 different mutually exclusive types of crossings that need to be distinguished. Additional tags can provide further details, but don’t fundamentally change the type of crossing from one of these 4.

 

In different jurisdictions, there may be multiple legally categorized variations of these 4 broad types. That’s what the crossing_ref tag is for.

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