Land Use and Transport Integration in Scotland (LATIS): a National Carbon Footprint

Land Use and Transport Integration in Scotland (LATIS): a National Carbon Footprint


H Gillies, S Cragg, Transport Scotland, UK; J Davidson, K Lumsden, MVA Consultancy, UK



Interest in carbon emissions associated with the transport sector has intensified in recent years. The impact on carbon levels now forms a key indicator for the implementation of potential transport infrastructure, policy and land use interventions. The assessment tools available for calculating the environmental impact or benefits of transport decisions are becoming an important aspect in the appraisal process.

Transport Scotland?s Land use and Transport Integration in Scotland (LATIS) commission provides a land use and transport modelling framework which covers the whole of the Scottish strategic road and public transport network. The framework has an ability to forecast changes in land use, traffic levels and travel patterns over time and appraise impacts associated with the introduction of transport schemes or policy decisions. It can also assist in the prediction of changes in traffic and travel levels associated with different economic or demographic scenarios.

The framework uses a combination of traffic levels and traffic speed data to generate a ?National Carbon Footprint? which covers road transport-related emissions. These calculations also include forecast changes to engine and fuel efficiency over time along with an ability to vary composition of the vehicle fleet. This ?footprint? offers a national perspective and provides a mechanism to assess the potential for transport interventions to help deliver the challenging targets proposed for reducing carbon emissions.

The Scottish Government?s Climate Change Bill sets out an interim target that ensures that the net Scottish carbon emissions for the year 2030 are at least 50% lower than the (1990) baseline, and a longer term target for the year 2050 that must ensure that net Scottish emissions are at least 80% lower than the baseline.

This paper will describe how the LATIS framework calculates a national carbon footprint and discuss comparisons to other carbon calculation methods. It will also demonstrate how the various interactions between land uses, demographic changes, transport interventions and technology are combined to predict the potential changes to the level of Scottish road transport-related carbon emissions over time.

Further information regarding the LATIS framework can be found at:


Association for European Transport