In order to de-escalate tensions between mappers of Greece, I would like to come to an agreement on how we classify grade-separated junctions, including motorway junctions: I understand the situation that we are in, and we know that we need to fix that without trading accusations and insults.
This RfC does not apply to level junctions.
Revisions are in blue.
A. Classification
There is currently two competing ways of mapping junctions:
- The first method, or the proportional method, is to roughly share the links between two connection types: like this.
- The second way, or the strict method, is to extend the highest classification to cover all links where there is no “escape”, like this.
I understand that there is a lot of inconsistency on how the highway authorities place the signs marking the start and end of motorway, and is why there is a lot of confusion.
In my opinion, I prefer to use the highest classification for links where there is no “escape”, up to the point where a road of a lower classification crosses, joins, or leaves the second (strict) option, because I do not want the map to trick prohibited types of traffic (e.g. pedestrians, cyclists and horse-drawn vehicles) into areas where they should not be.
Where any part of the motorway junction contains a pedestrian crossing, the concern about pedestrians not being able to use them can be resolved by adding foot=yes and sidewalk=left/right/both/none to the sections where pedestrians need to use to access the crossing.
Roundabouts are not mapped as links.
B. Junction Numbers on links
I offer to removed the “Είσοδος”, “Έξοδος” and “Κόμβος” name tags, in exchange for a joint effort to and asked pressure JOSM to recognise the junction:ref=* tags when editing the road relations.
The suggestion for promoting junction:ref=* for junction numbers on slip roads stems from the fact that iD recognises it. Nope, I did not make that one up.
In respect of “junction:ref”, I support the use of that tag as it will identify members of a junction without conflicting with the road numbers.
In the case of interchanges between two motorways, the format will be junction:ref=[exit]/[entry], e.g. junction:ref=15/8 when changing from the A1 to the A6 at Metamorfosi.
C. Links in relations
I support including slip roads in road relations, because the scheme allows road relations to include slips roads under the role “link”.
In the case of interchanges between two motorways, the slip roads are members of both relations.
Extra: Another reason for including links in the relations (under the appropriate role, of course) is that the relation would have more details, and therefore provide complete information about the road.
General
This is not yet a poll, to allow for comments and suggestions.