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The public performance measure (PPM) shows the percentage of trains which arrive at their terminating station on time.

PPM combines figures for punctuality and reliability into a single performance measure. It is the industry standard measurement of performance.

The table below includes the following four regions:

Birmingham line - all trains serving Princes Risborough or any station north thereof

High Wycombe line - trains only serving stations Princes Risborough, Aylesbury (or south thereof, via High Wycombe)

Aylesbury line - all trains serving Aylesbury Vale Parkway or any stations south thereof (via Amersham)

Oxford line - all trains serving Bicester Village or any station north thereof
 

Punctuality and Reliability PPM

4 weeks
ending
Birmingham
line
High Wycombe
line
Aylesbury
line
Oxford
line
06/01/18 88.62% 93.83% 90.64% 85.04%
03/02/18 93.70% 95.75% 94.52% 90.64%
03/03/18 89.76% 93.58% 92.62% 85.01%
31/03/18 92.91% 96.12% 95.42% 92.16%
28/04/18 94.86% 97.3% 96.89% 95.47%
26/05/18 91.69% 95.9% 96.07% 91.32%
23/06/18 91.87% 95.68% 93.85% 90.39%
21/07/18 89.36% 95.43% 93.14% 87.68%
18/08/18 87.36% 92.54% 90.64% 85.17%
15/09/18 87.91% 93.18% 93.83% 83.78%
13/10/18 91.96% 96.07% 91.78% 90.90%
10/11/18 93.64% 97.18% 93.73% 95.82%
08/12/18 89.28% 95.60% 91.96% 92.79%
05/01/19 92.60% 93.41% 95.06% 91.14%
02/02/19 93.77% 97.35% 94.52% 92.41%
02/03/19 92.37% 95.08% 94.78% 91.29%
31/03/19 93.15% 94.44% 94.43% 91.38%

 

Punctuality

Right time punctuality measures the proportion of trains arriving at their terminal station early or within 59 seconds of their scheduled arrival time.

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