A revolution on the roads is approaching. Guardian news correspondent, Peter Walker, takes us on a journey around the world, exploring the varying attitudes to cycling on our highways. What are the tragic mistakes being made when planning and developing cities, and how do these mistakes lead to aggr...

A revolution on the roads is approaching. Guardian news correspondent, Peter Walker, takes us on a journey around the world, exploring the varying attitudes to cycling on our highways. What are the tragic mistakes being made when planning and developing cities, and how do these mistakes lead to aggression towards the cycling community?