I've noticed minor timetable changes on the Cobham line. Is this due to reliability of trains times into stations up to and including Surbiton?
The 6.06; 6.36; 7.16 and 8.36 from Guildford now leave at 6.04; 6.34 and 7.14 and 8.34.
The 7.36 now departs at 7.35. However the 7.06 still departs at 7.06 and the 8.07 still departs 8.07. Once a upon a time all the trains departed at 7, 17 or 37 minutes past the hour, as they do from the 9.07 onwards. They changed the times to 6, 16 and 36 due to reliability of the times. Perhaps that still wasn't enough.
The times trains depart from Surbiton remain unchanged. It's only the stations before. This gives the trains an extra 0-2 minutes to get to Surbiton, depending on which train it is. Wonder if they will arrive into Surbiton on time more often. What I use to find happen is they would depart from Hinchley Wood on time but late into Surbiton, due to the train in front from Woking being late.
As the Woking trains are not being retimed, I'm not sure what the advantage is but there must be one or they wouldn't do it.
One exception was the 7.16, which tended to be the most reliable into Surbiton as they give it an extra 2 minutes to arrive, arriving 7.53 and the previous train left 12 minutes before it arrived. Mostly the previous trains would leave just 3 minutes before the trains arrival. Therefore not sure why it needed to be retimed but there must have been a reason or it wouldn't have been done.
It can't have been to keep everything constant because there are now three trains departing at other times instead of 04. Previously it was just one train departing at a different time and once a upon a time, none.
When it comes to the leaf fall timetable, will they add another three minutes on like before or would they then start clashing with arriving trains? The 8.07 use to do that during leaf timetable but I don't think it was so bad last autumn. It would only clash due to an arrival train being late though. However they clearly see it as an issue the rest of the year as it's time has never changed.
I am fascinated by things like this. Perhaps I should have become a railway timetable planner!
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