As I said before the real danger is that an hourly Holyhead to Cardiff service will be imposed.
For anybody wanting more information on the Wrexham-Chester redoubling, there is a fantastically detailed report on the Welsh Government web site:
http://wales.gov.uk/docs/det/policy/120119northsouthreport.pdf
Ah, so it is WAG who are responsible for the hourly Cardiff - Holyhead via Wrexham idea.
Personally i would favor
2 hrly Holyhead to Euston
2 hrly Holyhead to Birmighmam via Crewe.
Hourly Llandudno-Manchester (possibly with the odd Bangor portion) that joins up with a service from Wrexham at Chester to provide extra capacity from Chester into Manchester.
Provision for 3/4 North to South trains a day.
Assuming electrification of north Wales coast and an OHLE version of a 444 (perhaps with fewer coaches) for the Holyhead - Birmingham that doesn't sound like too bad an idea. One problem is the Euston - Holyhead services are currently on top of the hourly ATW Holyhead service and themselves run hourly at certain times of day, so Holyhead might be a bit short of trains (perhaps introducing Llandudno - Holyhead stoppers would fix that though).
I think a handfull of really fast Holyhead-Cardiff services, with a calling pattern like the original southbound Gerald but with Wrexham instead of Crewe (basicly pickups along the north Wales coast, then non-stop (apart from calling at Shrewsbury) Wrexham to Newport) is a much better idea than an hourly (or even the present 2-hourly) normal stopping service.
The problem with portion working is Wales' regional express fleet includes a large proportion of class 175s, which are no good for portion working. If you can magic up a large fleet of 158s to swap for the 175s there'd be a lot more flexibility in what could be done.
It may be physically impossible to do without an infrastructure intervention.
What exactly are you suggesting might be impossible? A 1hr30min interval Pembroke Dock service (which I think could work in isolation, but not fit neatly with hourly services on other routes etc.)? or a service more frequent than that (hourly would I think require infrastructure intervention)?
It is a difficult task to do without the correct tools so there are no real tricks or techniques that are employed. You would need a complete list of the sectional running times, the timetable planning rules, a WTT and graph paper to make a stab at it. Then once you see the bigger picture you can see what is stopping a standard interval.
I think you may have mis-understood (or maybe I have misunderstood your post). I base my experimental timetables on journey times from the public timetable, but find that if I were to propose, for example:
- 0.5tph Holyhead - Crewe
- 0.5tph Holyhead - Manchester
- 0.5tph Llandudno - Crewe
- 0.5tph Llandudno - Manchester
I can't get it to work in such a way that:
- The intervals west of Llandudno Junction are hourly,
- The intervals between Llandudno Junction and Chester are half-hourly,
- The intervals between Chester and Manchester are hourly and
- The intervals between Chester and Crewe are hourly
Now, I think making it work like that is impossible, but I just wondered if anyone who understands timetabling better than me thought otherwise.
That's why my proposal ended up as 1tph Holyhead - MAN and 1tph Llandudno - Crewe, it seems to be possible to make it work out neatly.
These trains do not start at Manchester so it is still assisting the people of Wales getting to Manchester,
Sorry, I don't understand. I was pointing out that your suggested frequency for Welsh services (ie. ATW services, assuming you are talking before end of franchise) between Chester and Manchester was somewhere between houly and half-hourly (3 trains per 2 hours). Unless you mean to use portion working, with trains from both the Wrexham direction and the north-Wales coast joining for the trip into Manchester and back.
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news on the redoubling which commences this year which will see three trains an hour up & down through Wrexham General instead of the current hourly service.
Was any mention made of what these three services per hour were likely to be? Or was this just the quoted capacity of the redoubled route?
No,but Mike Bagshaw said the North East Wales taskforce would be taken into account, it was mentioned that with the speeding up from Salop to Chester,extra capacity would be available. The WG push is to improve speeds North/South, we argued local travel patterns need to be taken into account,this was accepted.
Was it confirmed that three trains an hour will definately be introduced from 2015/16 when the doubling is done? If so, where's the rolling stock coming from?