Bus Bunching Explained Visually
Any bus rider knows what a problem bus bunching can be. (Anybody riding AC Transit's 51B to campus lives with this daily.) It's a popular research topic, with many articles and reports exploring the causes and solutions to prevent bunching.
ITS PhD student Lewis Lehe and designer Dennys Hess have developed visualization to explain why bus bunching happens. (You need to use Chrome.) Go try it out. CityLab and Metafilter are talking about it.