航路网络中的繁忙交叉点流量过大会导致航空器偏离最佳飞行高度，增加二氧化碳、氮氧化物、二氧化硫、一氧化碳等污染物的排放。本文从燃油消耗和碳排放的视角出发，提出一种航路交叉点通行能力的确定方法：基于历史飞行轨迹数据，挖掘实际飞行高度与最佳飞行高度差值与交叉点流量和度之间的关系；采用飞行轨迹、航空器机型、发动机类型和大气环境等数据，建立了航空器燃油计算模型；提出了根据碳排放与航路交叉点特征的非线性回归方程一阶导数极值确定航路交叉点小时和日通行能力的方法。在航路网络规划、空中交通流量管理等优化阶段，采用新的航路交叉点通行能力标准控制航路交叉点的飞行流量不大于通行能力，航空器平均二氧化碳额外排放量将会减少1.68%~8.27%，这对航空运输业节能减排具有重要意义。

Excessive traffic at busy intersections of air routes in the air route network can cause aircraft to deviate from the optimal flight altitude and increase emissions of pollutants such as carbon dioxide， nitrogen oxides， sulfur dioxide and carbon monoxide. From the perspective of fuel consumption and carbon emission， this paper proposes a method for determining the capacity of intersection of air routes. Based on the historical flight trajectory data， the relationship between the difference between the actual flight altitude and the optimal flight altitude and the flow and degree of intersection of air routes is mined. Based on the data of flight trajectory， aircraft type， engine type and atmospheric environment， a calculation model of aircraft fuel is established. A method is proposed to determine the hourly and daily capacity of air routes intersection based on the extreme value of the first derivative of the nonlinear regression equation of carbon emission and characteristics of air routes intersection. In the optimization stage of air route network planning and air traffic flow management， if the new capacity standard of air routes intersection is adopted to control that the flight flow at the air routes intersection is not greater than the traffic capacity， the average additional CO₂ emissions of aircraft will be reduced by 1.68%–8.27%， which is of great significance for energy conservation and emission reduction in the air transport industry.