过去二十年间,随着世界经济和我国经济的高速发展,我国航空运输量逐年增加,空中交通也以惊人的速度发展,这一切都缩短了时空距离。民航的航路开辟得越来越多,而相对于航路的开辟,航线的增加,其终端机场的个数却相对比较固定,这样就造成了空域拥挤,随之产生了不少空难事故和飞机延 Over the past two decades, with the rapid development of the world economy and the economy of our country, the volume of air traffic in our country has been increasing year by year and the air traffic has also developed at an alarming rate. All this has shortened the space-time distance. Civil aviation route more and more open, and compared to the opening of the route, the route increases, the number of its terminal airport is relatively fixed, thus resulting in airspace congestion, resulting in a lot of crashes and aircraft delays