Drone Technology Tested for Rescue Operations in E4 Förbifart Stockholm Tunnel

Testing of drone technology is currently underway in the deep tunnels of the E4 Förbifart Stockholm project to enhance future rescue operations. These tunnels, descending approximately 80 meters below Lake Mälaren, present a challenging environment due to the absence of satellite navigation signals.

The Swedish Transport Administration is working closely with rescue services, including the Södertörn Fire Defense Association, to evaluate whether existing drones can reliably operate in such conditions. Practical tests conducted in the tunnels have assessed drone stability, maneuverability, and range with and without 4G mobile network connectivity. The drones are equipped with advanced sensors and LiDAR technology, allowing them to maintain positioning and avoid obstacles without relying on satellite signals.

Results indicate that while drones can fly several kilometers within the tunnels, expected operational needs for rescue missions would be over shorter distances. These tests help determine the technology’s reliability, limitations, and pilot workload, informing decisions on integrating drones as tools for emergency response in complex underground environments.

E4 Förbifart Stockholm will serve as a real-world testing ground for these technologies ahead of its scheduled opening in 2030. The collaborative efforts aim to enhance tunnel safety, improve rescue service capabilities, and guide future investments in drone technology for emergency operations across Sweden.