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西方国家对空中交通管理的研究开展很早。20世纪60年代后期，随着空中交通运输量的高速增长，原来的空中交通管制系统已经不能满足日益增长的交通量的需要，结果造成大量的航班延误，给运营部门带来很大经济损失。仅仅通过空中交通管制设施的改善(如机场的扩建，通信设备的更新
Research on air traffic management in western countries started very early. With the rapid growth of air traffic volume in the late 1960s, the original air traffic control system was no longer able to meet the needs of increasing traffic volume. As a result, a large number of flight delays caused great economic losses to the operating departments. Merely by improving air traffic control facilities (such as airport expansion, updating of communications equipment