Supporting statement for the headway
Dear Department for Transport,
The publication Review of the Technical Specification for High Speed Rail in the UK A report to Government by HS2 Ltd January 2012
is on line at the link below
https://assets.publishing.service.gov.uk...
It includes a reference to the following document:
Prof. Roderick A Smith, FREng., 2011,
Supporting statement for the headway
document, http://www.hs2.org.uk/publications/
Supporting-statement-for-the-headwaydocument-
from-Prof.-Rod-Smith-77737
The link to that referenced document has been broken and I am otherwise unable to locate it on line.
I would be grateful if you would provide the information contained in that referenced document and , in addition, the "headway document" for which it is a "supporting statement".
Yours faithfully,
Paul Thornton
Dear Dr Thornton,
Please see attached documents.
Regards,
Ivan Pocock
FOI Advice Team, Governance Division, Group Assurance and Digital Directorate
Department for Transport
D/04, Ashdown House
Sedlescombe Road North,
St Leonards on Sea, TN37 7GA
Dear FOI-ADVICE-TEAM-DFT,
Thankyou, I am grateful for your prompt response.
Yours sincerely,
Paul Thornton
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J Marriott left an annotation ()
The caveats in Prof Smith's statement effectively undermine his assertion that 18tph is achievable reliably. The 18tph refers to plain level track but gradients have a significant bearing on safe stopping distances. There is also a significant problem in merging trains onto one track in the first place. Prof Smith is quite rightly a fervent critic of HS2's non-segregated design & many other aspects of the whole scheme.