[jacquesm]

Oh you can have that in Bucharest even with regular cars. Lanes are pretty fluid there, as is the preferred direction of travel, I've lived there for only two years and I've seen more vehicles go in the opposite direction ('ghost riders' we call them here) than anywhere else over the rest of my life. Romanian traffic is super dangerous, especially if you are a pedestrian and you can just about forget cycling in traffic. It is also the only place where a car behind me honked to get me to move over when I was walking on the sidewalk.