Helena's current research interests lie in the realm of sustainable systems, particularly transport systems. Previous research has focused on the development of decision support tools for local authorities, particularly computer models and tools for analysing the impacts of transport, land-use and energy policies, and the assessment of relationships between transport, land-use and the environment. Helena also has a strong interest in GIS-T applications.  More recent research has focused on the social dimensions of sustainability, in particular on the links between social exclusion, transport provision and other urban systems. Helena has worked with a range of companies, government organisations and NGOs through both research collaborations and consultancy including RPS group, Ipsos MORI, Transport for London, and BT.