Japan has approximately 3,170 miles of roadway tunnels, 1,503 miles of railway tunnels, and 3,325 miles of utility tunnels that require rigorous maintenance inspections.
Traditional manual tunnel inspections in Japan were labor-intensive, costly, and less accurate, prompting the adoption of drone and AI technology for streamlined inspections.
Toda Construction Co. in Tokyo has partnered with Spiral Co. and GreenBee Inc. to develop a drone platform for tunnel inspections, using advanced autonomous flying drones and AI software.
The drone inspection system has significantly reduced inspection time, improved accuracy, and enhanced worker safety, leading Toda to plan full implementation by the end of 2025, marking a significant advancement in infrastructure management.