[Tagging] lanes = 0

Greg Troxel gdt at lexort.com
Fri Jun 21 22:48:37 UTC 2019

Joseph Eisenberg <joseph.eisenberg at gmail.com> writes:

> This requirement is fine for Europe, but the presence of lane markings
> is not reliable in all of the world.
> In developing countries, such as here in Indonesia, the presence of
> painted lane markings is inconsistent. Often cheap pain is used
> instead of more durable thermoplastic, so the markings only last a
> year. After that the road still functions the same, even though the
> markings are no longer visible.

It is not just about developing countries.  In my part of the US, there
are many roads whicha have either no paint at all, or have white lines
at the edges (so you can see where the edges are at night).   Almost all
of these roads are wide enough for two cars to pass comfortably, but not
really wider than that.  This seems really obviously one lane in each
direction, and everybody who drives here gets that.  There is a legal
requirement to stay on the right of the imaginary center lane (absent a
reason such as passing a pedestrian); you can be cited for "operating
left of center" entire reasonably on a two-cars-wide road with no
markings -- but that will only happen if you are left of center
egregiously or on a blind curve or rise.

So that's a long way of saying that "lane markings" should not be
required for lanes=N; it is enough to observe the local conventions.

I agree that a finer-grained tag that says if there are markings or not
is sensible.  But the most important thing is to describe how traffic
actually behaves.

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