Turning LCA Results into Decisions: Stakeholder-ready Outputs for Sustainable Infrastructure

Main Presenter:    Alexandra Kalnev 

Co-Authors:                                                  

Meeting global infrastructure needs will require 106 trillion USD in investment by 2040, while by 2050 around 84.3% of Germany’s population and 68.4% of the world’s population will live in cities. This significantly increases pressure on underground infrastructure systems. The construction sector is facing increasing sustainability expectations, driven by evolving policies, funding requirements and stakeholder pressure. This contribution focuses on the underground infrastructure. While Life Cycle Assessment (LCA) provides a robust framework to evaluate sustainability performance, its potential remains underused in practice, particularly in public planning and procurement where decisions with the largest impacts are made early. This contribution explores how LCA results can be translated into stakeholder‑specific, decision‑ready outputs that support sustainable choices in infrastructure projects. Building on industry experience in Germany we identify typical decision points and define
formats that make LCA results accessible, so that LCA’s can move from technical reporting to policy‑relevant decision support and making sustainable infrastructure choices more consistent, transparent, and scalable. This framework could be a used as a best practice to address relevant construction choices for decision makers. These could be also used in a different or international context.

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