The world is shifting towards more sustainable transport solutions. Railways are one of the most environmentally friendly means of transport and the use of new technologies opens the door to further reducing its carbon footprint.

CAF currently focuses its technological innovation on:

  • Spearheading the shift to clean drive technology.
  • Developing technology for catenary-free trams, thereby facilitating their integration in urban environments.
  • Reducing rail transport energy consumption to a bare minimum.
  • Developing environmentally friendly solutions for the future across the entire rail system.
Alternative traction


  • The integration of ion-lithium batteries on vehicles.
  • The integration of fuel cells on vehicles.
  • Energy Storage optimization tools.

Energy management


  • Methods and tools to estimate and optimise energy consumption.
  • On-board driving assistance for autonomous driving.
  • On-board driving assistance for connected driving and advanced features.

Train-level energy efficiency


  • Reduction of Train Resistance by means of aerodynamic performance simulation modelling (Drag coefficient).
  • More efficient train equipment.
  • SiC power electronics.
  • Optimization of thermal flows (heat transmission and cooling).


  • Lighter equipment and subsystems.
  • Structural Strength optimization and simulation methodologies, under exceptional loads, fatigue loads and crash conditions, including lighter, state-of-the-art materials (composite materials).
  • Wireless technology.
  • New train architecture.

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