Our one-way streets now have bike lanes on either side. Both bike lanes go in the same direction, the direction of traffic, and they make left turns so much easier. These are busy three-lane commute streets that got converted into two lanes plus two bike lanes, and I was skeptical at first but now I really love them. They make it very easy to get around this city on a bike. I am a little bit afraid of bike lanes -- the older ones are all basically one door's width away from where the cars park -- and will usually take the lane instead, but I love the one-way bike lanes now.

As for the original question, I think some European cities have very different bike lane setups than we have in the US so it is hard to answer the question.