Cascafico
(Cascafico)
3
There are two reasons:
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practical: like you said, a vehicle plus towed caravan can hardly accomodate in a 5-7 meter parking space
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legal: a towed caravan, once stabilized, loses its moving status and become camping, which in Italy is forbidden outside caravan sites.
Note that in several countries even an overnight stop of a camper is illegal. Instead, in Italy you can: that’s why I think is important to differentiate tags for OSM.