Clean Air Zones: Practical Guidance for Cities

Vehicle emissions are often a major source of air pollution in cities. Clean Air Zones (CAZs), and similar schemes such as Low Emissions Zones and Zero Emission Zones, are one of the tools available to cities seeking to address this challenge. This guidance is for policy makers who are interested in CAZs, including elected leaders, mayors and officials in local governments and city administrations.

The guidance aims to support cities around the world at whatever stage they are in their pathway to clean air. It aims to help cities navigate through the process of developing and delivering a CAZ. It sets out key questions to answer, building on existing resources and supporting with lessons from elsewhere, bringing the entire process together into this comprehensive guidance. The guidance has been developed from an expert review of the current best practice for CAZ, a detailed literature review and 10 interviews, workshops and roundtables with cities from the Global North and Global South to enable cities to learn from each other.