伦敦拥堵费的经验教训
如果不收拥堵费，伦敦的空气污染和二氧化碳排放可能更严重，而中国城市从中可吸取的教训是，此类措施须更大、更巧妙而有力度。
What other cities can learn from London’s flawed congestion charge
Several Chinese cities are weighing up different types of congestion charging to combat smog and alleviate traffic snarl-ups. Dave Hill asks what they can draw from London's experience
