Hamburg’s U5 Subway Line: Tendering and Award Criteria for Sustainability Requirements

The decarbonisation of major infrastructure projects is a key factor in achieving climate targets in the transport sector. Public clients can contribute to this by incorporating sustainability criteria into their tendering and award conditions. Such measures can create incentives to use lower-emission building materials and construction methods, whilst also improving transparency in supply chains. Using the example of Hamburg’s U5 subway line, this article shows how sustainability can be integrated into procurement processes step by step, in compliance with public procurement law. The focus is on criteria for reducing greenhouse gas emissions (GHG emissions) and for addressing environmental and social risks, particularly within steel and concrete supply chains.

1 Overview and Key Issues for
Infrastructure Projects

Large-scale infrastructure projects have a significant impact on the climate due to their high consumption of materials and energy. Steel and concrete, in particular, account for a substantial proportion of construction-related greenhouse gas emissions. Their supply chains are often global in scope and complex, which places increased demands on transparency and traceability.

In previous tendering procedures for engineering and construction works, the focus has predominantly been on costs, schedules and technical functionality. Where...

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