改航线 meaning in English

re routing
re-routing

Does the course configuration assist with efficient race management
改航线的构成能满足竞赛管理的需要吗？
With the rapid development of civil aviation and the special situation of our country ' s airspace , there come to be some congestions of air traffic in some airspace
同时,流量控制措施常常导致在起飞前的延迟、飞行中的等待、使用不经济的飞行高度层,改航线和航班、打乱班机时刻等多种负面影响。