March 18, 2026 • Regulators at the Federal Aviation Administration are tightening safety rules in congested airspace around major airports, suspending the use of visual separation between planes and ...

npj Urban Sustainability has a 2-year impact factor of 9.1 (2023), article downloads of 345,172 (2023) and 16 days from submission to first editorial decision (2023). Five Editorial Board members of ...