Challenge
SWB Bus and Rail, the major public transport operator based in Bonn, Germany, faced the challenge of managing large volumes of obsolete copper cables after upgrading to modern electronic interlocking systems. These redundant cables posed safety hazards, occupied valuable space along transport routes, and represented wasted resources if discarded without recovery.
Solution
TXO partnered with SWB Bus and Rail to implement an urban mining pilot project. We dismantled 350 kilometres of outdated signal cables across roughly 16 kilometres of track. TXO coordinated the safe removal of cables in tunnels and above-ground areas, collaborating with specialist firms for cable dismantling and copper processing to maximize recycling efficiency.
Result
- Recovered and recycled approximately 150 tonnes of copper.
- Enhanced fire safety in tunnels and freed up route space for future infrastructure projects.
- Supported circular economy principles by reducing dependence on new copper imports.
- Reduced CO₂ emissions by an estimated 237 tonnes after factoring in project-related logistics.
- Achieved a positive financial outcome while laying a strong foundation for SWB to expand urban mining as a key part of their sustainability strategy.
Conclusion
By recovering valuable materials, improving safety, and reducing emissions, the initiative sets a powerful example of circular economy principles in action. Encouraged by these results, SWB is committed to continuing and expanding this approach, reinforcing its leadership in sustainable urban mobility and resource conservation.
For more details, please read the article, “How SWB Bus and Bahn operate “Mining in the City”