Maybe this is the first time you are seeing a data visualization of train traffic in Sri Lanka and it looks amazing!
Nuwan Senaratna (@nuuuwan), currently working on an interesting project to explore and gain a better understanding of the railway network in Sri Lanka. The analysis is done using Python with the available data on railway.gov.lk website. He is planning to write some data science articles about Sri Lanka Railways in coming the weeks.
Please check the below video for data visualization and check out his Twitter thread for the latest updates.