These figures show how the improvements we have been making to the railway are having a positive impact for passengers across Britain, by getting more of their trains on time.
This is known as Public Performance Measure (PPM), and measures the percentage of trains which arrive at their destination on time.
In the table below we have shown the average Public Performance Measurement for Britain as a whole, and by train operating company calculated over the 366 days to 10 December 2011.
The national Public Performance Measure is 91.1%
Train operating company
|
Current PPM
|
|
|
93.4%
|
|
|
96.3%
|
|
|
92.4%
|
|
|
88.5%
|
|
|
84.2%
|
|
|
92.8%
|
|
|
89.6%
|
|
|
89.9%
|
|
|
89.4%
|
|
|
92.6%
|
|
|
89.3%
|
|
|
96.2%
|
|
|
94.6%
|
|
|
90.6%
|
|
|
91.3%
|
|
|
90.9%
|
|
|
90.0%
|
|
|
92.7%
|
|
|
85.1%
|
Overall
|
91.1%
|
PPM methodology
PPM combines figures for punctuality and reliability into a single performance measure.
PPM measures the performance of individual trains advertised as passenger services
against their planned timetable as agreed between the Operator and Network Rail
at 22:00 the night before.
PPM is therefore the percentage of trains ‘on time’ compared to the total number
of trains planned.
A train is defined as ‘on time’ if it arrives within five minutes (ie 4 minutes
59 seconds or less) of the planned destination arrival time for London and South
East or regional services, or 10 minutes (ie 9 minutes 59 seconds or less) for
long distance services.
Where a train fails to run its entire planned route calling at all timetables stations
it will count as a PPM failure.