I offer as counterpoint Santa Cruz, CA, where I grew up. It's hard to imagine a more bike friendly city: there are bike lanes on nearly every road, there are special bike trails along many busy routes, and there are bike racks everywhere. And a lot more people bike than in other places I've lived.
But it's still a tiny minority, and the vast, vast majority of people drive everywhere because the city is too small and spread out to have decent public transportation.
Also note, I'm not only talking about commuting to work or shopping. I live in an area where every single structured activity my children are involved in (school, sports, entertainment, etc.) requires them to be chauffeured. That's one more car on the road that could have been avoided with better residential planning, urban or suburban.
The parent is right - studies have shown that if you improve bicycling infrastructure, you increase the number of bicycle commuters. However, you are also correct... even in the American city with the most bicycle commuters (Minneapolis) the total percentage of commuters using bicycles is less than 3%. Unfortunately, the density of American cities does not lend itself to bike commuting. Even though it's not even ranked in the "best places to bike" articles, I thought Manhattan was the easiest place in the USA to get around on a bike.
Agreed with your agreement with comments above. We live in (the suburbs of) Minneapolis, and we bike-commute. Most of the time I actually walk to shopping or to the nearest branch of the county library system, but I bike to do various errands. My wife is a regular bike commuter, who has put on 2,000 miles of bike commuting in all seasons since a year ago. But this area is terribly spread out, and for purposes such as bringing children to soccer games we have to drive. (Yeah, I know, driving to go get exercise sounds more than a little odd, but that is why it is called "travel" soccer. Just getting to different "home" fields for practices in different age groups in the sprawling territory of our local soccer club involves a lot of driving, even though our U14 player does his utmost to bike himself to practices and some home games.) Quite apart from the weather here, it's hard to imagine the percentage of bike commuters in greater Minneapolis going much over 5 percent, simply because of how sprawling the metropolitan area is.
For a description of bicycling culture in Minnesota in January (winter), see
http://www.bicycling.com/news/featured-stories/1-bike-city-m...
I never, ever cycle in the UK.
Reason ? In Finland towns have cycle paths everywhere. It's safe. People take their little kids cycling. Lots of people cycle.
In the UK it's appallingly bad in comparison. Some places may have a few cycle lanes here and there for appearance's sake but in the main it's nothing. When you go cycling in the UK you're taking your life in your hands. You're a completely unprotected second-class citizen. A guy I knew died that way, hit and run by a taxi. I certainly wouldn't allow my kids to cycle here.
However, things are getting better - Edinburgh has a pretty decent cycle path network (mostly on old railway lines, so they sometimes appear to be ridiculously over-engineered - with huge bridges and tunnels). We had a family cycle on Sunday morning where we cycled for about 3 hours with perhaps 15 minutes of that being on roads.
I wouldn't let kids cycle on roads by themselves though - something I did as a child from an early age without thinking about the dangers (I did grow up in a small village in the north of Scotland!).
There's more to it than recreational cycle paths though.
In order to change people's lifestyle - i.e. to be a practical alternative to the car in cities - the paths have to go somewhere useful. In other words, you need cycle paths connecting offices, schools and shops. Even in Edinburgh I see that as a long way off - and the city council seem fit to sink money instead into the neverending tram fiasco.
<sigh>
While it's a heavily used system, outside of the center ring it's mostly for fitness and leisurely bike rides more than anything else. No amount of niceness makes up for the fact that those suburbs are 30 minutes away by car. Most people just don't have two hours to dedicate to their commute.
The fundamental problem isn't that biking isn't pleasant enough, it's that in a far flung suburb and exurb it's just not a practical choice.
It was reasonable for Le Corbusier to claim so in 1920. To believe it in 2011, one has to ignore the result of a century of doing it: the suburbs.