Space-Based Radars Expose Severe Risks in Aging North American Infrastructure
Washington, Tuesday, 10 March 2026.
Advanced satellites detecting structural shifts of mere millimeters reveal that 1960s-era North American bridges are the world’s most deteriorated, posing severe risks to vital supply chains and economic stability.
The Scope of the Infrastructure Deficit
Published in the journal Nature Communications, a comprehensive study spearheaded by researchers from the University of Houston and Delft University of Technology (TU Delft) evaluated 744 bridges globally [1][2]. The data indicates that infrastructure in North America—primarily constructed during the infrastructure boom of the 1960s—is currently in the poorest structural condition, with bridges in Africa following closely behind [1][2]. Many of these North American structures are rapidly approaching or have already exceeded their original design lifespans [1][2]. Prominent examples highlighted in the analysis include the Verrazzano-Narrows Bridge in New York City, the Vincent Thomas Bridge in Los Angeles, and Florida’s Sunshine Skyway Bridge [1].
The Technological Leap in Structural Oversight
Historically, bridge safety has relied heavily on manual inspections, which are often subjective and conducted only a few times a year [1][2]. Furthermore, fewer than 20 percent of long-span bridges globally—defined as those stretching 150 meters or more—are equipped with active Structural Health Monitoring (SHM) sensors [1][2]. This leaves a staggering 80 percent of major bridges without continuous structural tracking, forcing authorities to rely on visual assessments that can easily miss early, microscopic signs of structural fatigue [1][2].
Future Safeguards and Economic Resilience
Despite its proven efficacy in academic research, MT-InSAR has not yet seen widespread adoption among civil engineers and local authorities [2]. Dominika Malinowska, a co-author from TU Delft, noted that their global-scale evidence proves the technology is a viable, ready-to-deploy tool that could revolutionize infrastructure oversight [1]. Milillo further emphasized that remote sensing acts as a vital complement to existing SHM sensors, ultimately reducing maintenance costs and enhancing visual inspections in areas where direct physical access is severely limited [2].