Chris125
Established Member
My ONLY concern with HS2 is the fact it is only 2 tracks south of Birmingham and given the congestion of the Paris - Lyon route which is now full (and they're smaller city's than London and Manchester/Birmingham) it becomes very worrying indeed.
Among other oft-mentioned issues, this is helpfully tackled in HS2 Ltd's response to questions from the Transport Select Committee - available here
10. Does the proposed land-take for HS2 provide sufficient width for widening to 4 tracks at some future date?
Are structures being designed with future widening in mind?
No. The reasons for this were discussed in HS2 Ltd’s 2009 report High Speed Rail: London to the West Midlands
and Beyond. The relevant extract is reproduced below:
“6.1.60 We have considered the possibility of laying four tracks along the HS2 alignment, thereby increasing its
long term capacity, to 30+ train paths per hour in each direction, rather than the maximum of 18 we assume for
a two track railway. However, for the following reasons we have not pursued this option:
• The level of demand we have assumed – with growth continuing to 2033 and then levelling off – does not
appear to support such a substantial increase in capacity. That is not to say that the demand may not
materialise at some point after the next 25-30 years.
However it does suggest that HS2 would need initially to bear a substantial degree of additional cost and
environmental impact on the basis that the demand may materialise. We do not believe this to be a credible
position.
• Were a second trunk into London to be justified, there are compelling reasons to believe that its optimal
alignment would not follow the same as that of HS2.
- Firstly, a more easterly leg would enable high speed rail to address a broader market, and bring with it the
possibility of further improved journey times to destinations east of the Pennines.
- Secondly, we believe there is no plausible site for the approximately 20-platform station that would be required
to serve a four track high speed railway operating at full capacity, and nor is there a surface alignment into
London that could support a four-track HS2.
Were HS2 to be four-tracked to a point somewhere outside London, the second pair of tracks would need to
enter London entirely in tunnel and terminate at a different station (although it is worth restating here that
our analysis of the possible sites in central London suggests there is no obvious location for a second high
speed terminal).
- A further reason for preferring a second route alignment is the added resilience it would give to a national network.
6.1.61 In short, a decision to four-track HS2 would need to be made against the backdrop of considerable
uncertainty about future demand, and when other potentially superior options exist should the demand materialise.
For these reasons we have recommended as part of our proposals for HS2 that it remain only a two-track railway.
If demand materialises, a second leg could be built from the East Midlands to London.”
Chris
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