Combined rail-road transport, with its complex regulatory, infrastructural, organizational and technical environment, presents numerous opportunities for practical improvements and impactful research. A strengthening of this transport mode can serve rising transport demands and make freight transport more ecologically sustainable. Due to the complex nature of combined transport systems, there are various possibilities for improvement, of which a subset of 27 measures have been identified in a Delphi study. Synthesized with a systematic literature review for the last decade of combined transport research, a practice-oriented research agenda was developed, providing guidance for further research. Six research topics have been identified, ranging from the assessment of sustainability policies, digital platforms, seamless cross-border traffic, human factor, changing terminal roles and technological developments in rail transport.
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