Kevin Balke, a research engineer at the Texas A&M University Transportation Institute, says that while smart lights can be particularly beneficial for some cities, others are so jammed that only a sharp reduction in the number of cars on the road will make a meaningful difference.

德克萨斯农工大学交通研究所的研究工程师凯文·鲍克说，虽然智能交通灯对一些城市特别有帮助，但有些城市太拥挤了，只有大幅减少道路上的汽车数量才能有效改变拥堵的局面。

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Beyond that I'm just trying to help make a difference every day.

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They can't do it right throughout the squad because financially they haven't got it but for the real top-class players who are going to make a difference, I'm sure Neil would find the money somewhere.

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"I definitely credit everything, my life situation, my children's good fortune, my family, to General Mitchel - that's why I'm passionate about it, because one person can make a difference, " says Johnnie.

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