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