The Deep Decarbonization Pathways Project for Transport (DDPP-T) analyzes Paris-compatible sectoral strategies for the passenger transport that can serve to inform the 2018 Facilitative Dialogue and the preparation of future, more ambitious, NDCs by 2020. The project adopts an integrated approach of sectoral deep decarbonization strategies articulating the diffusion of low-carbon technologies with the future of mobility and all its drivers. Building on four country analyses (France, Japan, Mexico and the United Kingdom), this Issue Brief derives five cross-cutting messages for a deep decarbonization of the passenger transport sector.


  • Deep decarbonization of the passenger transport sector requires strong actions on four pillars of transformation. Only a consistent articulation of these synergistic pillars allows an effective deep decarbonization.
  • Deep decarbonization can help alleviate the time and monetary burden of constrained mobility for households. But the transition can be challenging.
  • Deep decarbonization can be compatible with satisfying mobility needs of all categories of population.
  • Deep decarbonization should combine context-specific actions, adapted to the different countries, mobility needs and travel distances.
  • Deep decarbonization should consider an early ramp-up of low-carbon technologies through the 2020’s, consistent with the high shares required by 2050.
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