[Tagging] Divided highways, and not so divided highways, one way or two

Peter Elderson pelderson at gmail.com
Fri Oct 11 19:57:18 UTC 2019

But where pedestrian crossing is not allowed at all, as in the case I described, two ways tagging does not give this routing problem.  These roads are not for pedestrians, there is no sidewalk, and if there is a separate footway or cycleway it is physically separated and cyclists/pedestrians will have to find the nearest crossing, as does the router. 

NB I am not pleading one way or the other. I just think there are cases where two-way tagging is a plausible and an acceptible solution, even when there is no physical vertical barrier. Oneway tagging might suggest crossing possibilities where in fact crossing is not feasible, even dangerous. That would be worse for a router than the opposite, because it might put people in danger. Routing a detour is the lesser evil.

Mvg Peter Elderson

> Op 11 okt. 2019 om 21:05 heeft Markus <selfishseahorse at gmail.com> het volgende geschreven:
>> On Fri, 11 Oct 2019, 11:21 Snusmumriken, <snusmumriken.mapper at runbox.com> wrote:
>> That tag is about lane changing, I don't see how it could be applied to
>> my example
> If i understand the wiki page correctly,
> lanes=2
> lanes:forward=1
> lanes:backward=1
> change:lanes:forward=not_left
> change:lanes:backward=not_left
> would mean that on both lanes it isn't allowed to turn left onto the lane of the oncoming traffic.
> And for the case i misunderstand that tag, we can invent a new tag. Splitting the road into two parallel ways isn't the only possible solution.
>> My assumption is that pedestrian routing engine would stick to
>> sidewalks and crossings and not to tell the pedestrian to cross a
>> street where there is no crossing. The individual pedestrian can of
>> course make up his own mind what legal/physical risks are acceptable to
>> save a bit of time
> As Kevin already pointed out, there are many places without pedestrian crossings. Therefore pedestrian routing wouldn't work where a road with painted lane separation is mapped with two ways.
> I wish you all a nice weekend
> Markus
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