[Tagging] access: motorcar and goods, how to read the hierarchy

Simon Poole simon at poole.ch
Fri Feb 17 11:26:58 UTC 2017

Mistake #1: assuming that there is a vehicle class hierarchy (of any kind).

Typically law-makers see no reason to conform to computer science
niceties when drafting regulations (rightly so) and will simply add or
deduct vehicle properties in ways that make sense for the regulation in
question (well most of the time :-)).

The OSM hierarchical approach makes sense from a practical mapping pov,
but will have issues accurately modelling such edge cases and I would
suggest just living with that.


PS: as I pointed out years back, vehicle class hierarchies also tend to
change between moving and resting traffic.


Am 17.02.2017 um 11:57 schrieb Martin Koppenhoefer:
> Looking at the current state of access tag documentation:
> https://wiki.openstreetmap.org/wiki/Key:access
> isn't "goods" a subclass of motorcar, rather than a parallel class of
> it's own?
> I came across this, because the Italian driving code has besides
> others these 2 classes (interestingly they also have a distinct class
> for animal drawn sleighs):
> - autoveicolo: super class which requires:
>   - at least 4 wheels, motorbikes excluded
>   - motor
>   and has subclasses from a) to n)
>   basically it is a subclass of "motor_vehicle", including cars,
> busses, tractors,  and hgv, but excluding quads, trikes, motorbikes,
> light motorbikes, cars with 3 wheels (e.g. Piaggio ape), some tractors,
> - autovettura: vehicles for the transport of persons, max 9 seats, but
> excluding some other classes (like goods).
> Question is: what is motorcar meant to mean in OSM?
> Isn't there a general problem with the hierarchy? Imagine finding a
> sign forbidding motorcars to pass. Isn't this including hgv as well?
> (In Germany at least it does), but in our hierarchy, motorcar and hgv
> are side a side.
> Cheers,
> Martin
> ___________________
> for reference:
> https://it.wikisource.org/wiki/D.Lgs._30_aprile_1992,_n._285_-_Nuovo_codice_della_strada/Titolo_III
> 54a: "autovetture: veicoli destinati al trasporto di persone, aventi
> al massimo nove posti, compreso quello del conducente;"
> _______________________________________________
> Tagging mailing list
> Tagging at openstreetmap.org
> https://lists.openstreetmap.org/listinfo/tagging

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