Length-squared L-function for Network-constrained Flows

To study the aggregation pattern of residents' movement, we conducted experiments using taxi OD flow. We chose data in areas within the Fifth Ring Road and belonging to Haidian District, because this zone is in the main urban area of Beijing, it can better reflect the dynamics of urban residents under complex traffic conditions. Moreover, it possesses infrastructures and facilities of different scales, and the residents' activities here are more diverse. We will identify the maximal aggregation during daytime (i.e., from 7 A.M. to 7 P.M) on October 20, 2014, in this area. All experimental OD data are matched to the road network according to the travel trajectory of the taxis. There are 123 flows in this area.