To address concerns about anticipated increases in air traffic, leverage the capabilities of new technologies to enhance service, and accommodate new classes of airspace users, the U.S. Federal Aviation Administration and its partners embarked on a modernization effort known as the Next Generation Air Transportation System, or NextGen. NextGen encompasses a wide-range of improvements in communications, navigation, surveillance, and Air Traffic Management (ATM) automation systems.

NextGen also includes many procedural improvements to leverage new technologies and advances in the science of ATM. This article describes the vision for NextGen, discusses the planning framework (including the business case for the investments), enumerates the major implementations to date, and describes the implementation challenges. Finally, the article discusses the future direction of NextGen.

为了解决人们对航空运输量预期增长的担忧，利用新技术的功能来增强服务水平并为新的空域用户提供服务，美国联邦航空管理局及其合作伙伴着手进行了现代化的工作，即下一代航空运输系统，或NextGen。NextGen在通信，导航，监视和空中交通管理（ATM）自动化系统中进行了广泛的改进。

NextGen还包括许多程序改进，以利用新技术和ATM科学的进步。本文介绍了NextGen的愿景，讨论了计划框架（包括投资的业务案例），列举了迄今为止的主要实现，并描述了实现方面的挑战。最后，本文讨论了NextGen的未来发展方向。