I rode behind this chap for a while in Tokyo. He is carrying a cane and his right leg doesn't function properly for whatever reason. When setting the bicycle into motion, he could only use his left foot to turn the pedals until he achieved momentum. Then he could use his right foot to ride along. I was behind him at three lights and was fascinated at how he did it each time, even in heavy traffic. No fuss, no wobble, just steady, practiced motion.
Meanwhile, back in Copenhagen, this disabled Copenhagen has three wheels under her and the bicycle helps her get around the city. The homemade sign reads "Slightly Disabled".
Whatever the city or country, I love the mobility that the bicycle provides.