Engineers Explore Self-Healing Infrastructure to Address Aging U.S. Roads and Bridges
Engineers are investigating 'self-healing' infrastructure systems to address the challenges posed by America's aging roads and bridges. These systems utilize materials like concrete, asphalt, and composites that can autonomously detect and repair microcracks. This technology is moving from laboratory research to pilot projects, promising longer-lasting infrastructure. However, it raises questions about long-term maintenance, performance guarantees, and procurement frameworks. The collapse of the Francis Scott Key Bridge in 2024 highlighted the vulnerability of critical infrastructure, emphasizing the need for innovative solutions. Nationwide, 49.1% of bridges are rated 'fair,' and 6.8% are 'poor,' with 39% of major roads in poor or mediocre condition. 
