The chart consists of 11 horizontal bars representing different train speeds ranging from 10 to 79 miles per hour (MPH). Each bar has one to six color shadings to note the total number of trains running at each speed by the six rail operators (CSX, NS, IORY, CIND, CET, and IERR). The clear takeaway is that the majority of trains traveling in the OKI region each day (34%) are operating at the lowest speed (10 MPH).