June 24, 2024

Low-emission zones:
the essential guide


Low-emission zones (LEZs) are areas where the most polluting vehicles are regulated. They have become a widespread measure in European cities, with more than 320 active LEZs registered by 2022 and over 500 expected by 2025.

LEZs have proven to be effective at reducing air pollution, contributing to reducing carbon emissions, mitigating congestion, and incentivising the transition to zero-emission vehicles (ZEVs).

This briefing, by the Clean Cities Campaign, is a condensed overview of the knowledge base on LEZs, using our own research and the most up-to-date scientific publications.

It includes a deep-dive into LEZs, practical solutions for city leaders and best practice examples from cities across Europe, including:

Key takeaways

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