What is a Circular Road? Defining Circularity for Road Infrastructure

Alexander Grødum Vetnes; Reyn  O'Born

doi:10.55845/joce-2026-41314

Authors

Alexander Grødum Vetnes University of Agder Author https://orcid.org/0009-0009-2612-5120
Reyn O'Born University of Agder Author https://orcid.org/0000-0001-7575-4438

DOI:

https://doi.org/10.55845/joce-2026-41314

Keywords:

Circular Economy, Road Infrastructure, Lifecycle Governance

Abstract

Circular economy (CE) strategies in road infrastructure (RI) remain fragmented and predominantly material-centric, with limited integration of lifecycle governance, demand reduction, and ecological regeneration. While buildings have advanced circular practices, definitions, and guidelines, the road sector lacks a sector-specific definition that reflects its long lifetimes, spatial permanence, public ownership, and continuous maintenance cycles. This study combines a literature synthesis with a stakeholder workshop to identify conceptual and practical gaps in current CE applications for RI. Findings show a dominant focus on recycled materials and construction-phase emissions, while avoidance strategies, design reimagining, long-term traceability, and end-of-life restoration remain underdeveloped. The result of this research is to propose a working definition of circular RI grounded in lifecycle planning, functional adaptability, material stewardship, ecological regeneration, and network optimisation. The definition provides a conceptual foundation for developing indicators, procurement criteria, and governance frameworks that align material cycles, infrastructure performance and ecosystem outcomes.

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