Greater Anglia (GA) railway punctuality

The following is an analysis of the punctuality of Greater Anglia railway Mainline services between Witham in Essex and London Liverpool Street station. After a hiatus of a couple of years, largely because I was working abroad and not using GA, I have now started colleting statistics again. Most of my journeys these days are between Witham and Stratford, with occasional trips to Liverpool street and very occasional other intermediate station trips.

The statistics below represent my journeys taken between 24/07/2006 and 16/02/2016. I recorded the actual arrival times and these are then compared to the scheduled times in the Greater Anglia railway timetable.

Statistical summary

  Overall 1 Year 13 week 4 week
Number of journeys 1913 108 25 15
On time or early 765 51 9 6
1 to 4 minutes late 577 32 8 4
5 or more minutes late 571 25 8 5
on time (real) 40.0 % 47.2 % 36.0 % 40.0 %
on time (passengers charter) 70.2 % 76.9 % 68.0 % 66.7 %
Total lateness 142 hours 43 mins
(8563 min)
9 hours 56 mins
(596 min)
4 hours 52 mins
(292 min)
3 hours 48 mins
(228 min)
Mean minutes late per journey 4 min 28 sec 5 min 31 sec 11 min 40 sec 15 min 12 sec

Disappointingly, of the 1148 journeys that did not arrive on time, only 132 had (on-train, audible) announcements as to what was the cause of the lateness (11.5 % ).

Overall lateness

Graph of cumulative total minutes late against time

Individual journeys

One Year

Graph of individual minutes late against time

All Time

Graph of individual minutes late against time

Moving Averages

One Year

Graph of moving 4 week average of minutes late against time

All Time

Graph of moving 4 week average of minutes late against time

Summary

The total number of minutes late over 1913 journeys was 8563 . The punctuality (as defined in the passengers' charter as percentage of trains arriving within five minutes of the advertised time) was 70.2 % (overall) or 66.7 % (last 4 weeks), to be compared with what used to be the passengers' charter target of 88 %. I can't find the current PPM target figure online anywhere - perhaps targets been done away with? I have asked the good folk at @greateranglia via Twitter. The latest claimed PPM performance by GA was 92.65 % at time of writing.

Distribution of arrival times

One Year, 13 Week and 4 week Distributions

histogram of arrival times

All Time Distribution

histogram of arrival times

Correspondence

I decided to write to Greater Anglia's predecessor, national express East Anglia once my total delays got to 8 hours. Further information is on the correspondence page

Updates

The updates have moved to their own page.

Links

Definitions (the small print)

The following definitions/rules were used:-