The United States government is currently revising federal aviation regulations to allow supersonic flight over land, supported by recent technological demonstrations of noise-reduction capabilities.

美國政府目前正在修訂聯邦航空法規，以允許在陸地上進行超音速飛行，此舉得到了近期噪音降低能力技術演示的支持。

The current regulatory framework, established in 1973, prohibited civilian supersonic flight over land to mitigate the impact of sonic booms. This restriction historically confined supersonic operations, such as those of the Concorde, primarily to oceanic routes. The Concorde, which entered service in 1976, was eventually retired in 2003 following a combination of high operational costs and a fatal incident in 2000.

目前的監管框架建立於1973年，禁止民用超音速飛行在陸地上運行，以減輕音爆（sonic booms）的影響。這項限制在歷史上將超音速運行（例如協和客機）主要限制在海洋航線。協和客機於1976年投入服務，但由於營運成本高昂以及2000年發生的致命事故，最終於2003年退役。

Under the direction of the Trump administration, a shift toward a noise-based regulatory standard has commenced. An executive order issued in June 2025 characterized previous regulations as impediments to American industrial competitiveness. Consequently, the Federal Aviation Administration (FAA) proposed a rule in June 2026 to replace the blanket ban with specific noise limits. A secondary set of standards regarding takeoff and landing noise is expected later this year, with finalization of both frameworks anticipated by mid-2027.

在川普政府的指導下，監管標準已開始轉向以噪音為基準。2025年6月發布的一項行政命令將之前的法規定義為美國工業競爭力的障礙。因此，聯邦航空管理局（FAA）於2026年6月提出了一項規則，擬將全面禁令替換為具體的噪音限制。關於起飛和降落噪音的第二套標準預計將於今年晚些時候出台，兩個框架預計將在2027年年中最終確定。

Technological viability is being assessed via NASA's X-59 experimental aircraft, developed in collaboration with Lockheed Martin. On June 5, the X-59 achieved its target speed and altitude, demonstrating a 'quiet thump' rather than a traditional sonic boom. While the X-59 is not a commercial passenger vehicle, its data will inform the FAA's noise-based standards. Should these regulations be implemented, projected cruise speeds of Mach 1.4 could reduce a New York to Los Angeles flight to approximately three hours and a New York to London flight to four hours. Other private entities, including Boom Supersonic and Spike Aerospace, are also developing transatlantic supersonic capabilities.

技術可行性正透過NASA與洛克希德馬丁（Lockheed Martin）合作開發的X-59實驗機進行評估。6月5日，X-59達到了目標速度和高度，證明其產生的是「低沉的 thumping 聲」而非傳統的音爆。雖然X-59並非商業客機，但其數據將為FAA的噪音標準提供參考。若這些法規得以實施，預計1.4馬赫的巡航速度可將紐約至洛杉磯的航程縮短至約三小時，紐約至倫敦則縮短至四小時。其他私人實體，包括Boom Supersonic和Spike Aerospace，也正在開發跨大西洋的超音速飛行能力。

The US is transitioning from a total ban on overland supersonic flight to a noise-standardized system, pending the finalization of FAA rules in 2027.

美國正從全面禁止陸地超音速飛行轉向以噪音標準化為主的系統，目前正等待FAA於2027年完成法規定案。