Air Quality & Climate Change

Climate change and poor air quality are two of the key reasons why low emission mobility is moving up the political agenda across the world.

Our work in this areas focuses on reducing greenhouse gas emissions through the use of cleaner vehicles to lessen climate change risks, and limiting other airborne pollutants that degrade air quality with consequent health and environmental impacts.

Low Emission Car Changing

We are skilled in development, appraisal and evaluation of strategies and measures to reduce emissions, including transport policy interventions, infrastructure measures, vehicle-based measures and behaviour change programmes. 

We use a wide of transport models, coupled with state-of-the-art emission models, to appraise the range of options for reducing emissions and work with Local authorities to develop implementation plans.


  • Policy guidance on mitigation and abatement methods
  • Emissions modelling and forecasting
  • Advice and research on multiple transport technologies
  • Smarter choices and travel behaviour change
  • Low emission strategy appraisal

Leicester Clean Air Zone

ITP has played a leading role in Leicester City Council's Government-mandated Clean Air Zone (CAZ) study since its inception in 2018.  This study is driven by an air quality problem on certain areas of Leicester’s inner ring road, where there are persistent exceedances of legal NO2 concentration limit values.

Our role as lead technical advisor has included development, sifting and shortlisting of options, and coordination of outline business case development.  This draws on extensive transport, emission and air quality modelling that is being undertaken to identify a preferred CAZ option.   Our work builds on preceding commissions with the council to negotiate a short-term ‘clean bus’ agreement with operators, and feasibility studies looking at a range of measures focussing on taxis, goods vehicles, and private cars.

The study is due for completion in 2020, with an expected outcome of bringing about compliance a year earlier than currently predicted.

Leicester Clean Air Zone Studies
Eap Map

Green Transport Connectivity in Eastern Partnership Countries

The World Bank commissioned ITP to examine the opportunity to deliver green transport policies through multi-national cooperation. ITP developed a €105 billion decarbonisation and international connectivity strategy for Eastern Europe and the South Caucasus.

Our novel approach combined a continent scale Cube model with our in-house fleet and emissions model to develop and appraise policy combinations related to fleet efficiency, demand reduction and mode shift. The targeted interventions deliver a 50% reduction in greenhouse gas emissions from 'business as usual' by 2050, double transport activity and grow east-west trade. A breath of realistic financing opportunities were identified for each country including climate funds and private sector participation. 

To help non-modellers to use the results, an open source visualisation tool was developed to intuitively explain the impacts of interventions to decision makers, easing the process of promoting green transport policies.

Greater Birmingham and Solihull low carbon transport strategy

Access to European funding opportunities is competitive and, to be successful, Local Enterprise Partnerships are required to develop coordinated regional strategies. For the Greater Birmingham and Solihull Local Enterprise Partnership this highlighted a need to develop a Low Carbon Strategy for the area.

ITP was appointed to work alongside local Councils to draw individual strategies into one coherent document. This involved building consensus across Council staff and stakeholders to reflect the different challenges they are facing.

The output of our work was a strategy document which is enabling the Local Enterprise Partnership to bid for European funding.

Lowe Emission Birmingham 2
Low Carbon Romania

Romania climate change consultancy

Tackling the effects of climate change to create a lower carbon economy is a priority for the Romanian Government. With funding from the World Bank, ITP was commissioned to provide expert advice on integrating climate change mitigation and adaptation measures into national transport plans.

Work in-country informed our understanding of local constraints and enabled us to identify applicable experience from other countries. We then modelled the climate change mitigation impacts of different transport scenarios. 

Working alongside World Bank officers we compiled a Rapid Assessment Sectoral Analysis Report for the transport sector, which fed into Romania’s national climate change action plan. 

Nigeria low carbon emissions study

The World Bank funded this cross-sectoral study to examine the likely evolution of greenhouse gas emissions in Nigeria over the next 20 years and identify mitigation strategies.

Our role was to produce carbon emission estimates for the transport sector on a country-wide basis. We built a spreadsheet model using emission factors from the World Bank EFFECT model and established baseline ‘business-as-usual’ emissions levels derived from population growth rates, increasing incomes and economic activity leading to greater car ownership levels and demand for freight. 

A number of transport policy measures were then modelled to demonstrate how policy and transport interventions could be used by the Nigerian government to mitigate transport sector emissions.  

Kampala 2