Maxweight categories (Sweden, New Zealand)

[paulklie]

In Sweden few bridges have a max weight sign which contain the allowed weight in a numerical format.
Instead a weight class system is normally used. With four categories: BK1, BK2, BK3 and BK4. Other than this number, the signs are identical to eachother:

The community tags these as:

• BK1: maxweight=64
• BK2: maxweight=51,4
• BK3: maxweight=37,5
• BK4: maxweight=74

I have found a few notes of people who found the lack of options for these signs confusing, but I suspect even more used the "There is no sign" option, leading to incorrect data.

I think this could be fixed this by adding a new sign that allows an integer between 1 and 4, and tags the correct weight.

However, when looking through the wiki, I noticed that a similar system exists in new zeeland: https://wiki.openstreetmap.org/wiki/Key:maxweight#New_Zealand
So maybe a solution for both could be used. Anyone from new zeeland here who knows the system, and how common such signs are?

[westnordost]

I feel there should be some dedicated tag for this or some other way in which it should be indicated that the maxweight given does not derive from a numerical input but from a definition in the road traffic regulations, which may change any time.

From https://bransch.trafikverket.se/for-dig-i-branschen/vag/bk--barighetsklasser-pa-vagar-och-broar/ (translated):

BK1 Max 64 tons gross weight is allowed. Depending on the axle distance and axle pressure, the gross weight may be lower.
BK2 Max 51.4 tons gross weight. Depending on the axle distance and axle pressure, the gross weight may be lower.
BK3 Max 37.5 tons gross weight. Depending on the axle distance and axle pressure, the gross weight may be lower.
BK4 Max 74 tons gross weight with unchanged axle pressure requirements compared to BK1, but depending on the vehicle's axle distance, the permissible gross weight may be lower.

So, just tagging maxweight seems to not even be precise, as the allowed gross weight may be lower depending on the axle distance and axle pressure.

So, maybe at least give the traffic sign id. Care to research which traffic_sign=* id these signs have?

[paulklie]

I feel there should be some dedicated tag for this or some other way in which it should be indicated that the maxweight given does not derive from a numerical input but from a definition in the road traffic regulations, which may change any time.

I definitely agree that would be nice, but it seems like there has been no interest in doing so for the past 10 years, so I doubt that will happen anytime soon.

So, just tagging maxweight seems to not even be precise, as the allowed gross weight may be lower depending on the axle distance and axle pressure.

Aye, however the actual regulations are very complex and fully tagging them is not realistic. I suspect that data consumers are probably aware of this, and know to interpret maxweight=64 as BK1.

For example maxweight=64 alone has 24267 uses in sweden. In fact this value is the 3rd most used maxweight value globally, almost exclusively in Sweden: https://taginfo.openstreetmap.org/tags/maxweight=64#map

So, maybe at least give the traffic sign id. Care to research which traffic_sign=* id these signs have?

Neat idea, however the appropriate sign id's have exactly one use so far: https://overpass-turbo.eu/s/2erI
I will ask the Swedish community what they think. I especially like this since we can automatically add any other tag later, if a tagging scheme is decided on.

[westnordost]

Neat idea, however the appropriate sign id's have exactly one use so far: https://overpass-turbo.eu/s/2erI

Doesn't matter, the tagging schema exists.

[paulklie]

It seems like the community approves of this scheme, I will work on an implementation soon.