Local Transport Today is the authoritative, independent journal for transport decision makers. Analysis, Comment & News on Transport Policy, Planning, Finance and Delivery since 1989.

We obediently follow WebTAG’s six-year data rule. Shouldn’t we ask why?

Tom van Vuren
09 June 2017
Tom van Vuren, Mott MacDonald
Tom van Vuren, Mott MacDonald


Every self-respecting British transport modeller knows the six-year rule and their clients worry about its implications for timescales and budget: demand data in transport models should not be older than six years to stand up to WebTAG scrutiny. To me, it is surprising that this rule is contested so rarely. For starters, why six years, and not five, or eight? How hard is the rule – or is it mere guidance? And what about the waste in not using older data? So here’s my challenge: as a...

+92% more


This Article is supported by:
Senior Rail Programme Manager
Midlands Connect
£51,379 - £57,821
Highways Projects & Road Safety Manager
Cambridgeshire County Council

£49,268 - £53,170
Highways Development Control Officer
Bridgend County Borough Council
View all Vacancies

TransportXtra is part of Landor LINKS

© 2020 TransportXtra | Landor LINKS Ltd | All Rights Reserved

Subscriptions, Magazines & Online Access Enquires
[Frequently Asked Questions]
Email: subs.ltt@landor.co.uk | Tel: +44 (0) 20 7091 7959

Shop & Accounts Enquires
Email: accounts@landor.co.uk | Tel: +44 (0) 20 7091 7855

Advertising Sales & Recruitment Enquires
Email: daniel@landor.co.uk | Tel: +44 (0) 20 7091 7861

Events & Conference Enquires
Email: conferences@landor.co.uk | Tel: +44 (0) 20 7091 7865

Press Releases & Editorial Enquires
Email: info@transportxtra.com | Tel: +44 (0) 20 7091 7875

Privacy Policy | Terms and Conditions | Advertise

Web design sussex by Brainiac Media 2020