Biking against traffic on a one-way streets in Europe My recent experience with new Google Maps shows that it constantly leads me against traffic on a one-way streets in Europe in general and in Poland (where I live) in particular.

Are there any laws or regulations for this?

I assume Google wouldn't set a track that would violate local laws. But, on the other hand, it seems quite unnatural for me to bike against traffic on a one-way street.

And recently I have found a typical one-way street with a typical one-way signs on both ends:



And each sign was additionally labelled with a special label saying "Bikes excluded", which would suggest that biking against traffic on a one-way streets is strictly prohibited unless otherwise stated.
In Holland, were I assume cycling is much more common than in Poland, the kind of traffic sign you describe are abundant (see example, "uitgezonderd" is Dutch for "except for").



And cycling against traffic in a one-way street without the sign is indeed illegal. The same rules seem to apply in Poland, though I cannot find a reliable source for Polands cycling laws. As to why Google Maps suggests those routes remains a mystery, but it doesn't seem to happen only in Poland, see this link