Choices in modes of transport have important implications for public health and air quality. In this context, cities around the world are investing in bike share systems. While the growth in bike share journeys is impressive, globally, lots more needs to be done for cycling to take up a bigger share of journey modes.

In 2019, the Behavioural Insights Team (BIT) and the Transportation Bureau of the city of Portland in the United States worked together to encourage new members to sign up to the city’s bike sharing scheme.