  Transport makes an impact across SDGs, encompassing climate change, health,
inequality and sustainability. It is also an area in which individuals are able
to make decisions which have potential to collectively contribute to
significant and wide-ranging benefits. Governments and authorities need
citizens to make changes towards adopting sustainable transport behaviours and
behaviour change interventions are being used as tools to foster changes in
travel choices, towards more sustainable modes. Blockchain technology has the
potential to bring new levels of scale to transport behaviour change
interventions, but a rigorous approach to token design is required. This paper
uses a survey of research projects and use cases to analyse current
applications of blockchain technology in transport behaviour change
interventions, and identifies barriers and limitations to achieving targeted
change at scale. The paper draws upon these findings to outline a research
agenda that brings a focus on correlating specific Behaviour Change Techniques
(BCTs) to token design, and defines processes for standardising token designs
in behaviour change tools. The paper further outlines architecture and
operational considerations for blockchain-based platforms in behaviour change
interventions, such that design choices do not compromise opportunities or
wider environmental goals.
