Am 23.06.2013 22:10, schrieb martinq: > Note: I know that in US there are weight limits depending on the number > of axles, but this could be tagged (later or already?) by conditional > tagging like maxgross_weight = X @ axles>3; Y @ axles>4... In Germany it's similar: there are weight restrictions sometimes given as maximum-per-axis-weight, indicated by traffic sign 263 (see http://commons.wikimedia.org/wiki/File:Zeichen_263.svg ), which is similar, but not the same.
> 2) Trailers: In fact the gross weight applies to trailer and main truck > separately [as far as I know, since both are more or less legally > treated as separate vehicles], thus if there is a limit of gross 3.5t, > then the truck gross and the trailer gross must be below, but both > together can exceed the limit [as far as I know this also applies to > weight limits, e.g. at bridge with max 3.5t weight limit the trailer and > the truck are evaluated separately, but I haven't cross checked this]. > > But does this affect the proposed tagging? We tag the rules (e.g. here > is a gross weight limitation), but not how they have to be applied in a > specific case (does this limit apply for trailer and truck separately or > combined?). What's these restrictions used for? If anybody uses them from the osm data (and if we tag them, that should be our target), a scenario would be the trucker planning how to get from A to B - e.g. by an osm based navigation system. This could be configured for the invididual truck: - maximum axe load: x tons - maximum gross weight: y tons - weight: z tons (with current load of course) (and of course width, length, height...) Now he want's to get a route, and this has to be definitively possible to go. Getting to a bridge with a truck and realizing you have to turn around on a street really hurts - and it costs a lot of time, even if the trucker can make it. So for the trucker estimations should be possible to make conservative: If there's a restriction in OSM and that fits for me under any reasonable interpretation, than it's a bug in OSM if I'm not able/allowed to drive there. With this it would be: - max_weight: the maximum weight of the complete vehicle (including truck and trailer, in the German traffic rules (Straßenverkehrsordnung, StVO) that's a "Zug"; if I interpret my dictionary right, in English it's a road train. - maximum gross weight: (however the tag is called then): the maximum weight the complete road train is allowed to have if fully loaded. regards Peter _______________________________________________ Tagging mailing list Tagging@openstreetmap.org http://lists.openstreetmap.org/listinfo/tagging
