encourage others to use the outputs of the PCT project, we make the data underlying the online map available to download (via the Zones and Lines tabs in the tool’s online interface). We envision stakeholders in local government modifying scenarios for their own purposes, and that academics in relevant fields may add new features and develop new use cases of the PCT. Such enhancements could include: Transport planning is a complex and contested field (Banister, 2008). When it comes to sustainable mobility, policy, politics, leadership and vision are key ingredients that computer models alone cannot supply (Melia, 2015). The approach described here can, however, assist in this wider context by providing new tools for exploring the evidence at high geographical resolution and envisioning transformational change in travel behaviours. By providing transport authorities, campaign groups and the public with access to the same • Additional scenarios to illustrate a wider range of ‘cycling futures’, including medium- term and local targets. • Use of individual level data to estimate cycling potential and impacts. The use of synthetic ‘spatial microdata’, for example, could enable specification of scenarios and analysis of outcomes by a much wider range of predictors (Lovelace et al., 2014). • Additional purposes of trips in the model. An ‘education layer’ would enable priori- tisation of ‘safe routes to school’, building on methods analysing ‘school commute’ data (Singleton, 2014). Other data sources to include more trip types include mobile telephone providers (Alexander et al., 2015) and outputs from transport models. • Deployment of the PCT for new cities, regions or countries. This will depend on the availability of appropriate OD data, perhaps from sources mentioned in the previous point, and routing services that can estimate cyclable routes based on globally available data, e.g. using the function route_graphhopper from stplanr package. Such work could also facilitate international comparisons of cycling potential. 31