I think I'm going to try and get myself along to the next Oxford Critical Mass
. It might seem an odd event to appeal to someone who drives 35,000 miles per year* but I agree with the principles.
I think it should be safe and easy to commute in our Cities by bicycle (or on foot) and I think our public transport system should provide a credible alternative to relying on cars.
More on Critical Mass here* I drive those miles while working to upgrade the busiest railway line in the country, there is some irony there.