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Collision Concerns

机译：碰撞问题

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摘要

The rising rate of the most severe types of runway incursions at U.S. airports has the NTSB taking a fresh look at the underlying problems and recommending new solutions, with help from the FAA, unions and the industry. So-called Category A and B incursions-the most dangerous-have occurred on average only about 15 times per year over the past five years. However, the raw numbers are deceiving, as the number of flight operations per year has been decreasing, which means the frequency of dangerous incidents (the number of incursions divided by the number of flight operations) has been increasing.
机译：NTSB在美国机场，工会和业界的帮助下，美国机场最严重的跑道入侵事件的发生率不断上升，这使NTSB重新审视了根本问题并提出了新的解决方案。在过去五年中，所谓的A类和B类入侵（最危险的入侵）平均每年仅发生约15次。但是，由于每年的飞行操作数量在减少，原始数量在欺骗，这意味着危险事件的发生频率（入侵次数除以飞行操作次数）一直在​​增加。

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