The proof is in the pudding. Most people are asking what comes first, the bike culture, or the infrastructure? I think it's not that hard to answer since putting in bike lanes isn't like installing an 8 lane super highway.
These ZEBRA bicycle lane dividers, which they have in parts of Spain now, would really come in handy to keep cars out of bikers' space. They're designed by Curro Claret and made by Zicla, out of 100 percent recycled plastic (bonus!