SRC Infrastructure has played a pivotal role in transforming how Transport for London (TfL) manages and maintains its infrastructure through its involvement in the Asset Data Improvements (ADI) project. Following the successful completion of earlier phases, SRC is now delivering Tranche 3, which focuses on a wide-scale survey programme across a variety of asset types. This includes Hybrid General Inspection (HGI) Surveys, Roof Surveys using drones, and Slip Resistance Tests, ensuring that TfL’s vital transport network meets safety and efficiency standards.
A New Frontier in Urban Technology
A major innovation introduced in Tranche 3 is the use of drones, or Unmanned Aerial Vehicles (UAVs), for roof inspections. While drones are frequently used in various infrastructure sectors, deploying them safely and efficiently in dense urban areas presents unique challenges. SRC has successfully overcome these barriers, enabling urban asset inspections in locations where space limitations and logistical issues previously hindered progress.
In cities like London, working from height in confined or restricted spaces carries significant safety risks, particularly near busy transport networks. SRC’s drone solution mitigates these hazards by allowing for safe, remote data collection. The drones capture high-quality images from challenging-to-reach areas such as rooftops, glass structures, and over live railway lines—areas that typically required manual inspections or were previously inaccessible.
SRC’s partnership with TfL led to the development of a groundbreaking plant approval process that allows drones to operate safely within the congested environment of the Tube network. This process is a significant achievement, given the strict regulations governing urban airspace and rail operations. Traditionally, urban rail inspections required scaffolding or fall arrest systems—expensive and disruptive solutions. By eliminating these obstacles, SRC’s drone-based surveys enable quicker, safer inspections with minimal impact on infrastructure or public spaces.
One of the most notable aspects of this collaboration is that the drones can operate over live railway tracks during the day, reducing disruption to passenger services. This innovation departs from the standard practice of conducting inspections at night, which usually involves track closures and higher operational costs.
Precision and Efficiency: The Drone Advantage
The results of SRC’s drone surveys have demonstrated significant benefits in cost, time, and quality. A detailed cost-benefit analysis showed that using drones for inspections significantly reduce costs, compared to traditional scaffolding methods. While scaffolding-based inspections typically require 5-7 days to complete, drone surveys can be finished in just 1-2 days, allowing for faster data collection with minimal disruption to ongoing operations.
In terms of quality, drones equipped with advanced cameras, such as the DJI Zenmuse H20T, deliver exceptional image clarity, offering high-resolution data that outperforms traditional survey methods. This superior image quality enables more accurate and thorough inspections, especially in hard-to-reach or hazardous areas where manual inspections would be difficult or costly to execute.
Additionally, drone surveys require fewer personnel and resources. A typical survey team consists of a lightweight drone, a certified pilot, and a project coordinator, significantly reducing labour demands compared to the traditional approach, which often involves several engineers, scaffolding crews, and associated equipment. The use of drones not only cuts down on costs and time but also enhances the safety and efficiency of the overall inspection process.
Supporting TfL’s Sustainability and Safety Targets
SRC’s drone technology plays a crucial role in supporting TfL’s sustainability goals, reducing the carbon footprint of inspections by eliminating the need for heavy equipment and long on-site durations. The ability to complete surveys without road or track closures also significantly lowers energy consumption and aligns with TfL’s broader environmental objectives.
In a major milestone, SRC’s work led to an update in TfL’s safety standards, permitting drones to operate near live railway tracks—within 20 meters above and 5 meters horizontally from active rail lines. This breakthrough not only enhances the speed and accuracy of inspections but also opens the door for further adoption of drone technology in complex urban environments.
Looking Ahead
SRC’s collaboration with TfL on drone surveys marks a significant advancement in urban infrastructure maintenance. The successful deployment of drones in the London Tube network demonstrates the potential of this technology to transform asset management in cities worldwide. As SRC continues to integrate AI and drone technology into its operations, we remain committed to providing innovative solutions that enhance both efficiency and safety.
“As we move through this third tranche of the ADI, we remain dedicated to delivering the project with precision and innovative solutions. Each survey we conduct is a step forward in making London’s transport system safer and more efficient. It’s exciting to see how new technologies are improving the efficiency of our surveys, and I’m proud to be part of a team that consistently pushes boundaries to achieve the best outcomes for our client.”
– Paul Da Costa, Project Manager.