> At the moment biking is dominated by young fit and generally healthy people.
This is because our infrastructure sucks, so only young and fit people feel confident enough to bike around. In cities with high biking rates, that's not the case. Biking around for leisure is actually a stereotypical 'old person thing' in the Netherlands.
> I see lots of young parents going to work by bike, but do they take their kids to school on bikes? Does grandma get to the doctor on a tricycle?
If you go to a place with better infrastructure like Denmark, this is, in fact, exactly what you see. I visited Copenhagen this last summer and pretty much everyone there got around on bikes. I saw something similar, albeit to a somewhat lesser extent, in Munich and Lübeck, which aren't as good at biking as Copenhagen but still have lots of protected bike lanes.
I already take my son to daycare on my bike in Sunnyvale, but I'm a relatively confident rider. Confident enough to continue doing so even after we got hit by a car yesterday morning.
Here's a comment about biking in the bay area from a Dutch guy on the somethingawful forums:
> I think the expectations thing is a big problem, especially combined with bikers being (having to be) more obnoxious in the US. When I just arrived, I was shocked with how much all the bikers broke the rules (skipped lights, biked on the curbs etc.) and just were general assholes in traffic. Two weeks later I was one of them.
People in the US think lots of things are impossible on a bike, when really they're only impossible when the infrastructure is bad. Which, to be fair, is true almost everywhere in the US. If we made it good instead, those things would become possible.