Low Emission Zone Maturity Assessment Toolkit
Delivering a successful Low Emission Zone (LEZ) requires strong evidence, institutional readiness, technical capability, and stakeholder alignment.
Ricardo’s LEZ Maturity Assessment Toolkit supports cities and national governments to assess their readiness for LEZ implementation and identify the practical steps needed to move from policy intent to effective delivery.
Interested in Piloting the Toolkit?
We are currently inviting expressions of interest from cities and partners who would like to explore a pilot application of the LEZ Maturity Assessment Toolkit.
To request further information or discuss a pilot opportunity, please fill out this form.
FAQ
Low Emission Zones are a proven intervention to reduce harmful air pollutants from transport, protect public health, and contribute to climate and Net Zero objectives. When well designed and implemented, LEZs can:
- Reduce exposure to NO₂ and PM₂.₅ in urban hotspots
- Accelerate fleet modernisation and cleaner mobility
- Support wider Avoid–Shift–Improve transport strategies
- Deliver co-benefits for health, equity and urban liveability
However, many cities face challenges in translating ambition into implementation — including gaps in data, governance, enforcement systems and public engagement.
The assessment framework examines key dimensions of LEZ readiness, including:
Policy and Strategy
- Alignment with national and local air quality and climate goals
- Integration with wider transport and urban planning strategies
Emissions and Evidence Base
- Emissions inventories and source apportionment
- Air quality monitoring and modelling capability
- Exposure and health impact assessment
Governance and Institutional Capacity
- Roles and responsibilities across agencies
- Legal and regulatory frameworks
- Financing and long-term sustainability
Design and Enforcement
- Vehicle classification and compliance systems
- Digital infrastructure and enforcement mechanisms
- Data management and reporting systems
Stakeholder Engagement
- Public communication and consultation
- Equity considerations and mitigation measures
- Business and community engagement
The toolkit is designed for:
- City authorities and metropolitan governments
- National environment and transport ministries
- Development banks and funding agencies
- Technical advisors supporting urban air quality programmes
It is particularly relevant for cities in Southeast Asia and other rapidly urbanising regions seeking to strengthen institutional capacity before introducing LEZ measures.
The LEZ Maturity Assessment Toolkit is a structured, evidence-based framework designed to help authorities:
- Understand their current readiness for LEZ implementation
- Identify gaps in policy, governance, data and enforcement frameworks
- Strengthen the evidence chain linking emissions, exposure and health outcomes
- Apply the Avoid–Shift–Improve framework in a practical, city-specific context
- Prioritise next steps through a clear, phased roadmap
The toolkit provides a systematic way to assess both technical and institutional capacity, ensuring that LEZs are designed to be effective, proportionate and deliverable.
The LEZ Maturity Assessment Toolkit combines:
- A structured self-assessment framework
- Facilitated workshops and guided discussions
- Scoring and benchmarking across maturity levels
- Case examples from international practice
- Practical recommendations and prioritised action plans
The output is a clear diagnostic of readiness, alongside an implementation pathway tailored to local conditions.
The toolkit can be delivered as:
- A stand-alone diagnostic assessment
- A component of wider clean air or sustainable transport programmes
- Part of capacity building and institutional strengthening initiatives
- A precursor to detailed emissions modelling and policy design
Ricardo’s team brings extensive experience in air quality modelling, emissions inventories, health impact assessment, and LEZ policy design to support implementation beyond the diagnostic phase.