The Federal Aviation Administration ruled that President Donald Trump's planned 250-foot "triumphal arch" requires red safety lights to protect aircraft operating near Reagan Washington National Airport.
The FAA determined the monument poses an obstruction risk to flight paths serving the airport, which sits just south of the proposed construction site at Memorial Bridge's end, between the Lincoln Memorial and Arlington. Federal aviation regulations mandate that structures exceeding certain heights in proximity to active airfields display warning lights during low-visibility conditions.
The arch represents part of Trump's broader vision for a presidential legacy project in the nation's capital. The structure's placement near one of the country's most tightly controlled airspace zones triggered the FAA review.
Red obstruction lighting represents standard protocol for tall structures near airports. The lights alert pilots to obstacles during night operations and adverse weather. Installation and maintenance of the warning system adds operational costs to the project.
The ruling does not require architectural modifications to the arch itself. Architects and project planners can incorporate the lighting into the design without altering the monument's fundamental appearance during daylight hours. The lights activate only during periods of reduced visibility.
Trump's memorial projects have faced varying regulatory hurdles as proposals move through the approval process. Federal agencies responsible for the nation's capital including the National Park Service, Commission of Fine Arts, and FAA must sign off on major construction in Washington.
The FAA's determination represents a procedural step rather than an outright rejection. The lighting requirement sets a condition for approval but does not block the project's advancement through federal review channels.
The arch's construction timeline and funding remain under development. Project organizers have not announced a specific start date for building operations.