Network Rail’s innovative ‘hedgehog’ sleepers offer a sustainable alternative with significantly reduced carbon emissions.
- The ‘hedgehog’ sleepers, designed by Network Rail and its Technical Authority, are made from 90% recycled materials.
- These sleepers contain 90% less carbon than wooden models and aim to substantially lower the carbon footprint of railway infrastructure.
- Replacing traditional sleepers with the new design could remove the equivalent carbon emissions of 12,250 cars each year.
- The sleepers not only promise environmental benefits but also offer extended durability, lasting twice as long as concrete variants.
Network Rail, collaborating with its Technical Authority, has introduced the ‘hedgehog’ sleeper, a revolutionary move towards sustainable railway infrastructure. This composite sleeper, while visually evocative of its namesake due to its design, is notable for containing substantially less embedded carbon compared to traditional sleepers. It boasts a remarkable reduction in carbon content, with 90% less than wood and 78% less than concrete alternatives.
With approximately 350,000 concrete sleepers installed each year, a complete switch to hedgehog sleepers represents a potential annual reduction of 24.5 million kilograms of carbon dioxide emissions. This is roughly equivalent to taking 12,250 family cars off the roads, illustrating the significant environmental impact of this innovation. Furthermore, the replacement of 150,000 wooden sleepers annually with these new designs could similarly enhance carbon savings.
Crafted from 90% recycled materials, these sleepers are not only eco-friendly but fully recyclable, contributing to a circular economy. The new design extends durability, offering a lifespan at least twice as long as that of their concrete counterparts. This enhancement not only reduces routine maintenance closures but also simplifies installation processes, as they can be mechanically laid.
Nick Matthews, an engineering manager at Network Rail, highlights the environmental challenges posed by traditional sleeper materials. Wooden sleepers, sourced from South American rainforests, lead to habitat destruction and reduced biodiversity. Concrete production, similarly, is notorious for high carbon emissions.
Aran van Belkom, Lankhorst Engineered Products’ technical director, emphasised the alignment of this project with sustainable goals, appreciating Network Rail’s commitment to setting a new standard within the industry. The financial implications and timeline for widespread adoption, however, remain undisclosed.
The introduction of hedgehog sleepers marks a pivotal advancement in reducing the environmental impact of railway infrastructure.
