Figure 3. Network and cluster maps for London.

Networks are generated from the total number of source-destination flows over the reporting period, split into weekdays and weekends. Community detection is carried out to find sub-networks which are well-linked, as described in the text. a) Weekday network b) weekend network c) community detection of weekday network d) community detection of weekend network. Red dots are stands which show no flows in the reporting period, typically because they were not active.