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摘要

Reflections on the Year in SciencernMorris Flynn's recommendation for alleviating bottlenecks ["Math Could Fix Traffic Jams," story #39, Year in Science, January/ February] attempts to address the symptom, not the cause. The real problem is that people tailgate and end up too close to the car in front to slow gradually. The better solution is a part of "intelligent" traffic: Using radar for emergency braking and automated cruise control will allow the car to maintain a proper minimum distance, allowing sufficient time to gradually react to slowing traffic.