[Tagging] lit=yes/no threshold

Volker Schmidt voschix at gmail.com
Sat Jul 6 14:43:49 UTC 2019


Just two additional aspects from my own experience on bicycle, to make
things even more complicated:

1) cycle and foot path illumintion dramatically depends on the presence of
leaves on the trees that are planted along the road. (don't get me wrong: I
like trees)

2) another effect which is very annoying and normally completely neglected
by road designers: in many cases cycle paths are being constructed in a way
that you have to pedal against  the car flow on the "wrong" side of the
road, i.e. you get the full blast of the assymmertic headlights of the
oncoming motor vehicles on the main carriageway. Your are effectively blind
even with high level of surface illumination. This is the price you pay two
have two-way cycle paths on one side of the road (which is the desired
situation from the daytime-use point of view).


On Sat, 6 Jul 2019 at 15:05, bkil <bkil.hu+Aq at gmail.com> wrote:

> In many parts of Hungary, vegetation can overshadow street lights,
> especially if they are placed high enough. They may make efforts to
> protect roads against this, but they rarely consider footways. Hence I
> know a lot of streets where road illumination is fair, but the
> sidewalk right beside it (maybe 1-2m from the road) is dark along the
> majority of the road.
>
> I also agree with Martin's definition of being lit and I usually do it
> like that.
>
> I don't split ways by the centimeter to specify illumination - if a
> stretch of path has too many shadows, you need to bring your own
> lights anyway, so I consider that not being lit.
>
> On Sat, Jul 6, 2019 at 2:39 PM Martin Koppenhoefer
> <dieterdreist at gmail.com> wrote:
> >
> >
> >
> > sent from a phone
> >
> > > On 6. Jul 2019, at 14:07, Tobias Zwick <osm at westnordost.de> wrote:
> > >
> > > The least subjective definition is to map the physical presence of
> street lanterns on the way, not the light they emit. (This definition
> (though) would mean that a footway close to a lit street would be mapped as
> unlit as long as it does not have own lanterns.)
> >
> >
> > the presence of street lights indicates the road could be lit, it has no
> implications whether it is actually lit. For example last summer I went to
> an island where all streets had relatively new street lights, but half the
> island they kept them off so that light pollution was reduced.
> >
> > In small villages in Germany, street lights are often turned off at a
> certain time (e.g. after 23h), etc.
> >
> >
> > Cheers, Martin
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