London has seen success in reducing traffic and increasing sustainable transport under former Mayor Ken Livingstone through a congestion charge and increased bus services and cycling infrastructure. However, with London's continuing growth, the new Mayor Boris Johnson faces challenges of planning a compact, walkable city that encourages a shift to cycling and reduces travel demand through technological and behavioral changes to address congestion and ensure the city continues to function well.

1. Green transport for a showcase city Jenny Jones Green Party Member of the London Assembly

2. London Mayor Ken Livingstone 2000-2008

4. London is growing

5. Planning is key

7. The challenge

8. THE CONGESTION CHARGE IS LAUNCHED

9. Cycling: 5% mode share by 2025

10. A COMPACT, WALKABLE CITY

11. The new Mayor Boris Johnson

12. Technological and behavioural change

13. London: The Big Smoke