Talk:Dual carriageway

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"Exception"

"However, if a road contains any of the non-appropriate elements and is still separated by a physical obstructions along other parts of the road within at most 1 km of the surrounding obstructions, then the road should continue to be mapped as a dual carriageway. These exceptions are typically easy to recognize and and should be mapped in-thought of ease of recognition, routing, presence, and functionality of the road. Other exceptions have been made for dual carriageways such as roads like Super twos found in the U.S. " Why should that be the case? For the former, it's more about subsequently refining the level of detail. For the latter, this is in conflict with the physical separation definition; when change=no etc can be used. ---- Kovposch (talk) 08:00, 5 May 2021 (UTC)

Then what should it say? --Lectrician1 (talk) 15:35, 5 May 2021 (UTC)
Well, especially the "within at most 1 km" is too random. "Other exceptions have been made" need a "by who" clause. Let me try. ---- Kovposch (talk) 06:33, 11 May 2021 (UTC)

Double-marked centre lines

An example of a 4-lane road that has no physical separation but with a double centre line.

In many cities, there are primary and secondary highways with 2 or more lanes for in each direction which are not separated physically, but only with double centre lines (and occasionally wider dashed no-traffic areas). Should these be mapped as one highway or as 2 parallel highways. The wiki article is currently somewhat ambiguous about this situation.

The article currently says: Dual carriageways are not appropriate for roads that have no physical separation. This would speak for only one highway. However, it goes on to say: For example, roads with single-marked centerlines, [...]. This seems to imply that cases with double-marked centre lines should be mapped as dual carriage ways.

I don't have any preference for any, but I'd prefer if there is a community standard that I can adhere to. Any opinions? Martianfreeloader (talk) 19:11, 30 December 2021 (UTC)

@Martianfreeloader You should not use 2 highways in that situation. Before "For example, roads with single-marked centerlines..." it says "Dual carriageways are not appropriate for for roads that have no physical separation." so those following examples are things that should not use 2 highways. Lectrician1 (talk) 04:23, 31 December 2021 (UTC)
Use change:lanes:forward=not_left|yes + change:lanes:backward=not_left|yes. Kovposch (talk) 10:27, 31 December 2021 (UTC)
Thanks, I've clarified that. Martianfreeloader (talk) 11:45, 5 January 2022 (UTC)