content_image/315950.jpg
<img src='content_image/315950.jpg'>

This feature is illustrated in Figure 5, economic value of health benefits reported for the 4.1 km route in Figure 5 is estimated to be £70785. When health benefits are the main criteria for policy evaluation, OD pairs with low current rates of walking would be favoured for intervention. When emissions are the main criteria, OD pairs with a high baseline level of car use are also favoured. The exploration of these considerations is facilitated in the PCT by allowing users to select the top routes ranked by health and carbon benefits. 

## 5 Discussion 

We have outlined a method for modelling and visualising the spatial distribution of cycling flows, currently and under various scenarios of ‘cycling futures’. Inspired by previous ap- proaches to estimating cycling potential (Larsen et al., 2013; Zhang et al., 2014) and by online, interactive planning support systems (PSS) (Pettit et al., 2013), the PCT tackles the issue of how to generate an evidence base to decide where new cycle paths and other 

