Bridges

Transport for New South Wales (TfNSW) faces significant challenges in delivering efficient and effective transport services while managing its extensive portfolio of bridges. Traditional methods for bridge inspection are labour-intensive, time-consuming, and can expose inspectors to various risks. For example, standard bridge inspections typically require setting up work zones, redirecting traffic, and deploying large bridge access equipment, which can be disruptive and hazardous.

This paper explores the application of drone technology as a safe, reliable, and cost-effective tool for bridge inspection and asset management. Drones offer several advantages, including ease of use, flexibility with multiple sensors, and advanced capabilities such as AI and real-time defect detection. These features make drones exceptionally reliable and cost-effective compared to traditional methods.
The TfNSW Bridge Drone Inspection Program, funded under the Asset Technology Program, has been instrumental in integrating drone technology for bridge inspection. This initiative has successfully trained and certified 20 bridge inspectors and engineers to legally operate drones under CASA and Transport requirements. As a result, more than 6,000 bridges managed by TfNSW have been inspected using drones.

Specialised drones, such as caged drones for confined spaces, water-resistant drones for underwater piers, and drones equipped with thermal sensors for detecting defects beneath concrete, are being trialled under this program. Additionally, the project aims to streamline the conversion of video captures into three-dimensional models, enabling inspectors to accurately measure space and distance remotely.

Furthermore, advanced image processing methods and deep learning techniques are employed for real-time defect detection in concrete and steel bridges and tunnels. This includes identifying issues such as cracks, corrosion, and spalling, which are critical for prolonging the life of bridges.

The ability to utilise drone technology for bridge inspection contributes to value creation in the areas of safety, resilience, customer satisfaction, reliability, and environmental sustainability. By adopting drone technology and integrating it into bridge asset management practices, TfNSW is paving the way for more efficient, effective, and sustainable management of bridges across Australia.