Figure 3
From: Exploring usage pattern variation of free-floating bike-sharing from a night travel perspective

Probability density functions (PDF) and cumulative density functions (CDF) of fitted lognormal distributions for travel distance of FFBS trip within different time ranges on a weekday. The trips with lengths over 6 km (less than 1%) were not plotted here for visualization. (a)–(d) visualize the results of four periods: nighttime, morning, afternoon, and evening.