Fig. 2: Temporal evolution of jam trees during workdays.
From: Unveiling city jam-prints of urban traffic based on jam patterns
Demonstration of a typical jam tree with large influence during the day in October 26 in a Beijing and b Shenzhen, where the dark red link represents the trunk (surrounded by blue circle) while the orange links represent the branches. The scale bars are also presented in both maps. The number of existing jam trees during the day (average on 17 working days with the resolution of 1 h) in c Beijing and d Shenzhen. The total momentary cost of jam trees during the day (with the resolution of 10 min) in e Beijing and f Shenzhen. The error-bars (gray) which are surprisingly small are the variances of the total momentary cost in 17 working days. It can be seen from (c) to (f) that although the number of jam trees at rush hours in Beijing is 2–3 times compared to Shenzhen, their corresponding cost is however 4–5 times higher, indicated by the color bars.
