How many trains arrive on time
In the graph above, you can find data on how punctual trains are and how reliable they have been, quarter by quarter. Quarters follow the financial year, for example, Q1 would start on April 1 and end on June 30.
PPM stands for Public Performance Measure (PPM), we use it to measure punctuality. It is the proportion of trains that arrive at their final destination within five minutes of their timetabled arrival (or 10 minutes for long distance operators).
CaSL stands for cancellations and significant lateness, it measures reliability. It is the percentage of trains that have been cancelled or that arrived at destination with more than 30 minutes' delay.
MAA stands for "Moving Annual Average" and it is the average value calculated over the previous 12 months. For example, the MAA in Q1 2017-18 would be the average of all quarters from Q2 2016-17.
Detailed figures on PPM and CaSL can be found on our passenger and freight rail performance page.