I moved from the Netherlands to the US nine years ago, and one of the big differences I noticed was the almost complete lack of bicycles on the roads. Not just

I moved from the Netherlands to the US nine years ago, and one of the big differences I noticed was the almost complete lack of bicycles on the roads. Not just that, but also the way bikes are used (or not used). Where I'm from, there are many places with crowded traffic (not just in the bigger cities) and many, many bikes. It's common for kids to ride their bike to school, for example. There is such a thing as a "traffic test" for kids riding bikes, although I'm not sure if all schools do this. As for motorists, driving lessons are mandatory, and some of the things you learn are meant to protect cyclists: if your car has to take a right turn, you have to stop and look in your mirrors and over your right shoulder to check if there's no bikes coming (because they have the right of way!), and when you park you don't just slam open your car door, you look for bikes and other traffic first. (Failing to do so during the (non-trivial) drivers exam will likely earn you a failing grade.) The Dutch have a lot of crazy traffic rules, but some of them actually make sense. :-) This why there are relatively few accidents with bikes, people accept them as part of the regular traffic, and cyclists don't need to wear helmets. (They do need reflectors so they can more easily be seen at night.) So, coming from this, when you then move to the US, your first reaction might well be, "why don't people ride their bikes (to school, work, etc)?" One of the reasons is that it's just not a very common or safe way of transportation around here (at least in most areas -- I don't know about downtown SF or something).