I volunteer for UK cycling charity Sustrans. Whenever I've helped out at a stand at a local fair/festival, the number one question is always parents asking "Where can we take our kids to ride without traffic?".

Fortunately the UK is very slowly catching on to what has been standard practice in the Netherlands and Denmark for years, but outside London progress is still glacially slow. As an example: the cycle track mentioned by awjr in Oxford (along Marston Ferry Road) was put in in the 1970s. It's outstanding, and a huge success. Yet Oxford hasn't built anything like it since.