HSTEd
Veteran Member
- Joined
- 14 Jul 2011
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I've had a look at the study and its a bit confusing.
At most we are looking at about 7.5 miles of track between March and where the line runs into full development in Wisbech.
Why do they need a passing loop for a 30 minute interval service?
Covering both legs with a turnaround in under 30 minutes seems easily doable even with low performance diesel units.
A tram-train could do it easily.
EDIT:
Apparently they are using a low power parry people mover in the light rail study.
In other words, the study has been cooked to give the result they wanted.
EDIT #2:
With regards the diesel option, they assume a Class 170 to run a shuttle service between March and Wisbech... because using a 100mph train on a dedicated 60mph branch shuttle is a reasonable move. Especially a train that isn't even operated by Greater Anglia any more.
Technical running time of 634-678 seconds, which happens with the added 50% to be just too long to operate a shuttle with a single unit.
Convenient that isn't it.
Nevermind that I think of at least one other place on the network where a timetabled running time as high as 12 minutes is acceptable for a half hourly shuttle (St Ives v St Erth).
Oh and the report contains no optioneering about costing for achieving a higher speed limit than 60mph to reduce sectional running times with those 100mph units they are using.,
At most we are looking at about 7.5 miles of track between March and where the line runs into full development in Wisbech.
Why do they need a passing loop for a 30 minute interval service?
Covering both legs with a turnaround in under 30 minutes seems easily doable even with low performance diesel units.
A tram-train could do it easily.
EDIT:
Apparently they are using a low power parry people mover in the light rail study.
Neither of these two conditions can be met on the March to Wisbech line
as the timetabling study suggests that to achieve 2 tph the vehicle must be capable of maintaining a 45 mph average speed. This is above the published top speed of the People Mover.
In other words, the study has been cooked to give the result they wanted.
EDIT #2:
With regards the diesel option, they assume a Class 170 to run a shuttle service between March and Wisbech... because using a 100mph train on a dedicated 60mph branch shuttle is a reasonable move. Especially a train that isn't even operated by Greater Anglia any more.
Technical running time of 634-678 seconds, which happens with the added 50% to be just too long to operate a shuttle with a single unit.
Convenient that isn't it.
Nevermind that I think of at least one other place on the network where a timetabled running time as high as 12 minutes is acceptable for a half hourly shuttle (St Ives v St Erth).
Oh and the report contains no optioneering about costing for achieving a higher speed limit than 60mph to reduce sectional running times with those 100mph units they are using.,
This post was based on the GRIP 2 study, which is apparently not the current one.
To be honest if this is what £250k of consultancy money buys you, I am not impressed.
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