Railway construction site: Gigantic machines create new gravel!
The general renovation of the Berlin-Hamburg line will start on August 10, 2025 with modern cleaning techniques for railway tracks.

Railway construction site: Gigantic machines create new gravel!
In the last few days, an impressive scenario has unfolded in Prignitz, Brandenburg: The RM 900 S ballast cleaning machine, a real heavyweight in track maintenance, eats its way through the railway embankment and provides a breath of fresh air on the Berlin-Hamburg route. This special machine, which removes 3.5 tons of ballast per meter of track, caused a large hole under the rails. This is part of the first week of general renovation, during which Deutsche Bahn plans to renew no less than 165 kilometers of tracks and repair a further 61 kilometers. Daily Mirror reports that the general renovation will cost up to 2.5 billion euros.
However, the RM 900 S is not just a technical wonder; it also offers a systematic approach to ballast bed cleaning, which is crucial to ensuring that the railway infrastructure is maintained in the long term. After around 25 to 30 years, the track beds are often so dirty that they no longer function optimally, which makes thorough cleaning essential. These machines remove contaminants such as leaves and branches and check the gravel for compliance with standards. A challenge that is tackled with the latest technology and a clever system. Wikipedia provides detailed insights into how such machines work and highlights that previously manual cleaning is now mechanized.
Efficient technology in use
The RM 900 S works at an impressive pace. In just one day, it can clean up to two kilometers of railway embankment, removing 2,000 tonnes of unusable ballast. The collected stones are transported onto a conveyor belt and sorted through a sieve. Only the medium-sized, pointed stones remain for the stability of the railway embankment. This precise technology gives cleaning an efficiency that is essential in today's world, especially in view of the increased construction prices caused by a lack of planning security. This makes it all the more important that the work process is controlled by a worker sitting comfortably in a floating office chair - a convenient solution for hard work. Rhomberg Sersa reports similar advances in station infrastructure, using new technologies to improve safety and efficiency.
Another technical treat is already in the starting blocks: Next week, the “Henry the Strong” machine will be used to replace broken pieces of track. This interplay between modern technology and classic craftsmanship shows that around 80 construction crews with rolling equipment are active on the 280 kilometer long route. Much of the work, such as the replacement of a total of 249 switches, is carried out traditionally.
The future of railway construction
The challenges are great. Railway boss Richard Lutz points to a financing gap of 17 billion euros by 2029, and the lack of planning security makes it difficult for the construction industry to plan long-term. While billions are already being invested in the maintenance of the railway infrastructure in North America, companies here are also demanding more planning security and automation. Daily Mirror highlights that there are currently around ten large-scale railway construction machines in Germany, but given the growing demands, supplies will probably be needed soon.
The general renovation between Berlin and Hamburg shows how important it is to keep the railway infrastructure in good condition. The investments are undoubtedly high, but they are essential to ensure the safety and comfort of travelers in the future. And so the RM 900 S ballast cleaning machine proves to be an indispensable support on this path.