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Could Island line frequency increase to up to every 15min and are more units needed?

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Goldfish62

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Although that didn't stop them maintaining however many VEC-TIS units there were over the years.
Hardly ideal, though. A lot of shunting was required and those units were riddled with problems after only a few years.
 

cactustwirly

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Ten carriages seems tight. I can't help thinking that five or six three carriage units might have been worthwhile.

Not really, only 2 units are required for service each day, exception for the peak summer season.
 

yorksrob

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Hardly ideal, though. A lot of shunting was required and those units were riddled with problems after only a few years.

Maybe, but we'd still be quite a long way off of the full forty carriages of the VEC-TIS fleet. Every unit doesn't have to be under cover all of the time.

Not really, only 2 units are required for service each day, exception for the peak summer season.

Will that be the same for the proposed half hourly service ? Five or six units seems to be what is planned, so that's presumably a minimum. Why not have three carriage ones to cope with busy times in summer and after school etc.
 

Goldfish62

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Maybe, but we'd still be quite a long way off of the full forty carriages of the VEC-TIS fleet. Every unit doesn't have to be under cover all of the time.



Will that be the same for the proposed half hourly service ? Five or six units seems to be what is planned, so that's presumably a minimum. Why not have three carriage ones to cope with busy times in summer and after school etc.
They're going to run as four cars during busy times. Would two three cars, ie six cars fit in the platforms?
 

yorksrob

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They're going to run as four cars during busy times. Would two three cars, ie six cars fit in the platforms?

Ah, that would certainly be a good thing. Would five be enough, even on the basis of two sets of two out plus a spare ?
 

cactustwirly

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Ah, that would certainly be a good thing. Would five be enough, even on the basis of two sets of two out plus a spare ?

Yes, because the maintenance should be a lot easier than a 38ts, and those 4 car sets are only for the high season, in the low season it should be possible to do all of the intensive exams on the stock.

The whole point of the 484s is to cut costs, having loads of unnecessary carriages sat about isn't the most efficient way to run it.
 

cactustwirly

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Maybe, but we'd still be quite a long way off of the full forty carriages of the VEC-TIS fleet. Every unit doesn't have to be under cover all of the time.



Will that be the same for the proposed half hourly service ? Five or six units seems to be what is planned, so that's presumably a minimum. Why not have three carriage ones to cope with busy times in summer and after school etc.

Yes, because it's still 2tph, just the passing loop gets moved giving the line an even interval service.
 

HamworthyGoods

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They're going to run as four cars during busy times. Would two three cars, ie six cars fit in the platforms?

Lake was built for 6 cars but then the next new station, Smallbrook was only built for 4 cars. Shanklin has since also had the stops moved nearer to Ryde too.
 

Chris125

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Maybe, but we'd still be quite a long way off of the full forty carriages of the VEC-TIS fleet. Every unit doesn't have to be under cover all of the time.

That size of fleet was never sustainable, with the 5tph service only attempted on a few Summer Saturdays before being abandoned IIRC and the necessary points at Pier Head and the headshunt/second platform at Shanklin removed - the fleet was quickly whittled down and continued to shrink as vehicles deteriorated.

Will that be the same for the proposed half hourly service ? Five or six units seems to be what is planned, so that's presumably a minimum. Why not have three carriage ones to cope with busy times in summer and after school etc.

They'll have 5 units, allowing 2x4-car trains at busy times - 3-car units would be excessive in winter, offer less capacity than a pair of 2-car units in Summer, and would be awkward to stable and maintain at Ryde Works.
 
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NorthernSpirit

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Island Line will need more than five units, they should be looking at eight to include any future provisions such as a fifteen minute frequency or any reopening of lines (any further elaberation on this will be posted in Speculative Ideas).

Either way I very much welcome the new Class 484's.
 

Brissle Girl

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Island Line will need more than five units, they should be looking at eight to include any future provisions such as a fifteen minute frequency or any reopening of lines (any further elaberation on this will be posted in Speculative Ideas).

Either way I very much welcome the new Class 484's.
You could actually run a 15 minute frequency with 4 of the 5 units.

But let’s get real. It wouldn’t be a good use of taxpayers money to buy a few extra trains just on the off chance that a decision was made a few years down the line to increase the service beyond what is envisaged under this upgrade.
 

bb21

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You could actually run a 15 minute frequency with 4 of the 5 units.

But let’s get real. It wouldn’t be a good use of taxpayers money to buy a few extra trains just on the off chance that a decision was made a few years down the line to increase the service beyond what is envisaged under this upgrade.
Island Line will do very well to support a 3tph frequency even in the medium term, and possible with some minor tweaks here and there. Going to 4tph is going to be vastly more expensive with all the infrastructure changes required without the market to realistically support it.

Personally I think 6 units may be a better decision than 5, allowing even a 3tph frequency to have two doubled up sets in the summer, but on current plans 5 is more than sufficient. Just hope that in due course they will be more reliable than the current offerings on the Marston Vale.

Two are required for the timetable, but where possible 3 units are currently allowed a run-out each day, with the longer diagram switching during the day.
 

30907

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A 20 minute service works well with the present layout, but would be difficult with a single line from Smallbrook to St John's Road. A 15min interval would work well, but with the ferries every 30ish you'd get uneven loadings.

ISTR the 15min service was introduced when 12min proved too much, and required the double track Brading-Sandown.
 
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