4. Strategic Options
Strategic choices identified
Options have been developed
comprising compatible combinations of choice:
Train service
choices
Enhancements examined include additional trains on peak
dates, 30 minute regular interval services, journey time improvements, frequency
enhancements to 3 and 4 trains per hour, both on the pier and to Shanklin, and
service extension into Shanklin town centre.
Traction and rolling
stock choices
Retention of the present 1938 Tube stock is compared
with replacing with more recent 1983 or 1972 ex-LUL Tube stock, new build tube
gauge vehicles, and new light rail vehicles. Traction options for new build
examined include 3rd rail DC, overhead DC, dual pick-up electric, diesel and 3rd
rail DC/diesel.
Operational staffing choices
Retention of
conductor/guards is compared with investment in driver only operation with
passenger ticket machines at stations. Revenue protection would be carried out
by retail staff and could be achieved by enhancing the manning at stations or on
trains, or a combination of the two. The existing train delays sometimes
experienced at stations due to the conductor completing a retail transaction on
the train prior to door release and/or train dispatch could then be avoided. The
economics of train service frequency enhancement are significantly improved with
DOO and this is explored in the strategic option
evaluation.
Infrastructure choices
The infrastructure
choices address the following areas of choice:
- line speed
- track and signalling capacity
- route and station choices
- traction choices will potentially trigger electrification infrastructure
works and depot modifications
Options have tested enhancement of
line speed from 45 to 55 mph, the addition of a passing loop at Brading,
rationalisation at Sandown and Smallbrook- St John's Road. Conversion to light
rail, de-electrification or conversion to overhead line equipment and street
running loop to Shanklin town centre.
The primary choice with respect to
track capacity is mix and location of double and single track sections and any
passing loops on the route. Half hourly (or 15 minute frequency) requires
trains to cross just north of Brading, or with line speed improvements at
Brading station.
Any significant track and signalling alterations are
assumed to require bringing forward signalling interlocking, frame and panel
replacement from 2011.
Selection of options for review
evaluation
From the significant number of available choices from the
above key parameters we have identified the following strategic options
comprising compatible combinations of infrastructure, rolling stock, new
stations and train service specification.
These have been developed for
the purposes of this report, to assist in the examination of the likely
transport case for the route reopening.
A options: Base case - no
infrastructure changes
A1 Do Minimum. Retain existing rolling
stock until 2014, replace with cascaded ex LUL tube stock. Retain existing
train service on existing infrastructure. Renewals when necessary.
A2 Replace rolling stock in 2004 with cascaded ex LUL vehicles.
Retain existing train service on existing infrastructure. Renewals when
necessary.
A3 Replacement cascaded ex LUL vehicles in 2004.
Enhanced service: Regular half hourly to Shanklin and two pier shuttle trains
per hour.
B options: 'Heavy rail' investment - retain
3rd rail
B1 Replacement cascaded ex LUL vehicles with
enhanced train service as in Option A3 in 2004. Invest in conversion to Driver
Only Operation.
B2 Invest in track upgrade to improve journey
times and enable 10 minute metro style frequency on Ryde pier, incorporating a
regular half hourly service to Shanklin. Otherwise as Option B1 with cascaded ex
LUL replacement stock in 2004 and DOO.
B3 Invest in track upgrade
and provision of Brading loop with DOO and cascaded ex LUL stock in 2004.
Introduce clockface half hourly service and operate additional trains on peak
summer Saturdays.
B4 Invest in track upgrade, Brading loop, DOO,
cascaded LUL replacement stock in 2004 and introduce a 15 minute clockface
frequency timetable between Ryde Pier Head and Shanklin. No pier shuttle
trains. Train would be 2 car with some four car operation on some summer
Saturday trains. Overall vehicle mileage would be similar to the existing
situation.
C options: 'Light rail' investment - DC electric
C1 Dual pick-up DC electric new light rail vehicles in 2004.
Retaining 3rd rail Ryde- Shanklin and electrification with overhead
line equipment on an extension to Shanklin town centre. Otherwise as Option
B3.
C2 Convert entire line to OHLE electrification with Shanklin
town centre extension in 2004. New overhead pick up light rail vehicles.
Otherwise as Option B3.
D options: De-electrify - diesel light
rail
D1 New diesel light rail vehicles in 2004. De-electrify.
Otherwise as B3.
D2 New diesel vehicles in 2004 as Option D1,
with the addition of the Shanklin town centre extension. Otherwise as Option
B3
Table 1 : Indicative incremental initial outlays for
options evaluated
Incremental initial outlays above that required
in the existing Base Case are shown below to the nearest million pounds at
current 2001 price levels.
|
Option
|
Incremental outlays at 2001 prices above Option A1 existing base
case
|
|
A2
|
-
|
|
A3
|
-
|
|
B1
|
£1m
|
|
B2
|
£5m
|
|
B3
|
£6m
|
|
B4
|
£6m
|
|
C1
|
£11m
|
|
C2
|
£27m
|
|
D1
|
£9m
|
|
D2
|
£11m
|