adrock1976
Established Member
As mentioned in the "...Is it all about London - Brum?" thread, I have had a not so easy task at designing a post HS2 timetable. The aims I had in mind were that (apart from wires and fleet replacement):
1) Look at improving the service at the stations between Marylebone and Gerrards Cross as that part of Middlesex has a poor London Terminals frequency service when compared with Enfield Town, the GWR Relief Lines, Watford DC, Twickenham, Hounslow, and Brentford
2) Introduce an Old Oak Common - High Wycombe service (future extensions (wishful thinking I may add) to Banbury and Lutterworth via Brackley every 30 minutes each may be possible)
3) All stations north of Gerrards Cross to have a frequency of at least every 30 minutes.
4) All trains to call at High Wycombe, Princes Risborough (for Aylesbury shuttle), Haddenham & Thame Parkway, both Bicester stations, both Warwick stations, Porridge, and Birmingham Snow Hill (Platform 4 is anticipated to be brought back into use if not already as the Midland Metro vacated that a while ago). Also, Islip is a request stop with all of the Marylebone - Oxford timetabled to call.
My starting point was to avoid having trains departing Marylebone at xx27 and xx57, and arriving at xx22 and xx52 as these are the paths for the Aylesbury via Harrow-on-the-Hill as they share track with London Underground north of Harrow. Also, I have avoided having trains departing Marylebone at xx12 and xx42, and arriving Marylebone at xx07 and xx37 in case the Aylesbury via Harrow is doubled in frequency to every 15 minutes in the future. For this timetable to work, quad track is required between Northolt Junction and Denham and Old Oak Common - Northolt Junction redoubled, which these sections seem the easiest and not too controversial to do.
Although I have not illustrated this in my suggested plan, no trains will run to Aylesbury via High Wycombe, however, an improved Princes Risborough - Aylesbury shuttle will provide connections every 30 minutes (double track required to the left of the formation between Monks Risborough and Little Kimble or thereabouts), and also I would anticipate Transport for London to take over the West Ealing - Greenford shuttle, doubled to every 15 minutes.
For each of the Marylebone - Gerrards Cross local all stations except Denham Golf Club, the Old Oak Common - High Wycombe, and the Oxford/Birmingham (every 30 minutes to each), I have the frequency every 15 minutes. Saunderton is served by the Oxford trains where a change can be made at either Princes Risborough or Haddenham & Thame Parkway for Banbury and Birmingham, whereas both of the golf club stations (Denham Golf Club and Seer Green & Jordans) are served by the Old Oak Common trains every 30 minutes. That was the only way I could get the timings to work being as north of Gerrards Cross, there are no two consecutive stations that are quiet which makes it tricky to have an alternating calling pattern.
Although Denham has their service quadrupled from every 60 minutes to every 15 minutes, bear in mind that London Underground's Central Line was supposed to end there, but presently ends at West Ruislip as of today. Also, it would save the residents from going to neighbouring Uxbridge for the Underground.
Regarding the service level for Kings Sutton and Stratford upon Avon, I anticipate the Oxford terminators (not the opposite half hour Cotswolds as that is planned to be extended to Moreton-in-Marsh or further on, but the other two) to extend to Banbury with a call at Kings Sutton every 60 minutes (maybe on request if need be), with a 2 hourly extension to Stratford upon Avon (or improve Leamington Spa - Stratford upon Avon service).
I have attached the file below.
1) Look at improving the service at the stations between Marylebone and Gerrards Cross as that part of Middlesex has a poor London Terminals frequency service when compared with Enfield Town, the GWR Relief Lines, Watford DC, Twickenham, Hounslow, and Brentford
2) Introduce an Old Oak Common - High Wycombe service (future extensions (wishful thinking I may add) to Banbury and Lutterworth via Brackley every 30 minutes each may be possible)
3) All stations north of Gerrards Cross to have a frequency of at least every 30 minutes.
4) All trains to call at High Wycombe, Princes Risborough (for Aylesbury shuttle), Haddenham & Thame Parkway, both Bicester stations, both Warwick stations, Porridge, and Birmingham Snow Hill (Platform 4 is anticipated to be brought back into use if not already as the Midland Metro vacated that a while ago). Also, Islip is a request stop with all of the Marylebone - Oxford timetabled to call.
My starting point was to avoid having trains departing Marylebone at xx27 and xx57, and arriving at xx22 and xx52 as these are the paths for the Aylesbury via Harrow-on-the-Hill as they share track with London Underground north of Harrow. Also, I have avoided having trains departing Marylebone at xx12 and xx42, and arriving Marylebone at xx07 and xx37 in case the Aylesbury via Harrow is doubled in frequency to every 15 minutes in the future. For this timetable to work, quad track is required between Northolt Junction and Denham and Old Oak Common - Northolt Junction redoubled, which these sections seem the easiest and not too controversial to do.
Although I have not illustrated this in my suggested plan, no trains will run to Aylesbury via High Wycombe, however, an improved Princes Risborough - Aylesbury shuttle will provide connections every 30 minutes (double track required to the left of the formation between Monks Risborough and Little Kimble or thereabouts), and also I would anticipate Transport for London to take over the West Ealing - Greenford shuttle, doubled to every 15 minutes.
For each of the Marylebone - Gerrards Cross local all stations except Denham Golf Club, the Old Oak Common - High Wycombe, and the Oxford/Birmingham (every 30 minutes to each), I have the frequency every 15 minutes. Saunderton is served by the Oxford trains where a change can be made at either Princes Risborough or Haddenham & Thame Parkway for Banbury and Birmingham, whereas both of the golf club stations (Denham Golf Club and Seer Green & Jordans) are served by the Old Oak Common trains every 30 minutes. That was the only way I could get the timings to work being as north of Gerrards Cross, there are no two consecutive stations that are quiet which makes it tricky to have an alternating calling pattern.
Although Denham has their service quadrupled from every 60 minutes to every 15 minutes, bear in mind that London Underground's Central Line was supposed to end there, but presently ends at West Ruislip as of today. Also, it would save the residents from going to neighbouring Uxbridge for the Underground.
Regarding the service level for Kings Sutton and Stratford upon Avon, I anticipate the Oxford terminators (not the opposite half hour Cotswolds as that is planned to be extended to Moreton-in-Marsh or further on, but the other two) to extend to Banbury with a call at Kings Sutton every 60 minutes (maybe on request if need be), with a 2 hourly extension to Stratford upon Avon (or improve Leamington Spa - Stratford upon Avon service).
I have attached the file below.
