In the coming decades, decarbonization of society in response to climate change will result in transformation of urban systems, especially in the energy and mobility sectors. This transformation will likely lead to stronger links between both sectors, which may have both desired and undesirable consequences. However, current policies are predominantly sectoral and tend to assume only a positive impact of the transformation of the energy–mobility nexus on urban sustainability. We conducted a systematic literature review, which covered 78 articles, to identify the interactions between the transformations of urban energy and mobility systems, their impacts on various aspects of sustainability and equity, and the relevant policies that target the nexus. The results show that the positive impacts of the transformation of the urban energy–mobility nexus are outnumbered by negative impacts on various aspects of sustainability and equity. A major equity issue concerns a possible reinforcement of socio-spatial inequalities in access to renewable self-production of electricity, electric vehicles, their integration, and the associated benefits. In conclusion, the issue of socio-spatial inequalities should be a priority for further research and policy development, given the currently limited understanding of these equity risks and the growing emphasis on the need for a just transition.
GIS models are currently available for a broad range of applications in mobility planning. However, it is not known how widespread the current use of GIS models is among European urban mobility planners, nor what their user experiences and needs are. There is therefore a risk that the development of GIS models for urban mobility planning will be mainly driven by technical possibilities and data availability rather than by the needs of the prospective users. To inform model developers and ensure a good match between model options and user needs, we conducted a survey investigating the current application of GIS models in urban mobility planning practice in Europe as well as model data availability and the needs and priorities of European mobility planners regarding GIS models. We received 51 valid responses from the transport departments of 42 cities from 21 European countries. For developers of GIS-based traffic models, the findings indicate that in Europe there is scope for wider adoption and further improvement. The models currently used are considered useful to support urban mobility planning, but more than 60% of the surveyed cities do not yet use them. Increased user-friendliness, in particular for non-experts, appears important to promote wider adoption. Availability of non-traditional types of data, such as real-time data or data at neighborhood level, is still limited in most cities, but this may rapidly change. Finally, there is also considerable interest in traffic models that integrate social and environmental aspects.
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