(shall I try with my car?)
officinefabri for the 5kmh sign
signquick for the 5mph sign (USA)
not my car / not my photo
I hope nobody will do that. I would guess Mapillary will just recognize it as a road sign.
Is that even legal to have a sticker which looks like a road sign?
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BR, Yaro
No, it won’t due to semantic segmentation, which means that Mapillary tries to understand the image contents by labeling in multiple tiers. Simply put, traffic signs are usually on poles for which a probability score (if not multiple scores) is computed. However, this still does not mean that the system is completely foolproof.
In most jurisdictions, yes!
Thanks for the details.
BR, Yaro
It’s interesting, as I often capture while walking, and I’m pretty sure some signs will be captured right in front of a car (e.g. a truck or a lorry). In this case, it should recognize it as a sign. I’m not sure even I can do that each time correctly 
So, the person with a sign on the car (image above) has to draw a pole to the sign, and that would be a worthy opponent.
BR,
Yaro
I am not sure if it is that easy because Mapillary can also distinguish road maintenance, construction, and police vehicles that have traffic signs mounted to warn of construction zones and divert traffic around hazards. So, you would have to mimic a construction or police vehicle first, I guess. Mimicking a police vehicle could be illegal in some jurisdictions though, so please play safe. 
I will try in my garden than I will let y’all know, thanks for replying (yeah the title is a bit click bait lol)
