Moving forward with Track to the Future

Source: RTM Aug/Sep 16

Professor William Powrie, dean of the Faculty of Engineering at the University of Southampton, gives RTM and update on the innovative Track to the Future project.

Last year, RTM reported on the announcement of a major new programme grant known as Track to the Future (T2F), aimed at improving the understanding of the underlying science and developing new analytical tools for the design of long-life, low-noise railway track systems. 

The value of the award, to the universities of Southampton, Birmingham, Huddersfield and Nottingham, is £5m from the Engineering and Physical Sciences Research Council (EPSRC), with a further £3.5m in cash and in kind from collaborating industry partners including Network Rail and from the universities for postgraduate studentships associated with the research programme. 

This article is a brief update and review of progress during the programme’s first year. T2F is addressing three major research challenges: 

  • Track life: track maintenance is costly in cash and carbon terms, and interferes with railway operations. T2F will explore new, low-maintenance track forms. It will develop an understanding of the relationships between track stiffness and settlement, which can be measured, and differential movement of the track, which causes performance to deteriorate. It will extend ballast life by understanding and eliminating or mitigating causes of deterioration and developing designs that will continue to perform well after deterioration has set in; and will facilitate ballast re-use rather than downcycling or disposal.
  • Switches (points) and transitions: where trains change direction and cross tracks or other infrastructure there is a complex interaction of geometry, support, wheel profile and vehicle dynamics. This is not sufficiently understood, and frequent costly and disruptive maintenance is required. T2F will draw together the key areas of ground support, switch or transition zone geometry, and vehicle dynamics for the reliable assessment of crossing and transition zone behaviour, life and maintenance needs.
  • Noise and vibration: public tolerance of vibration and noise from railways is decreasing as use intensifies, yet these are traditionally regarded as secondary in design. T2F will develop and demonstrate, through modelling and full-scale testing, a low-noise, low-vibration track consistent with reduced whole-life costs and low maintenance. 

Over the past year, in terms of understanding the science, we have developed two complementary approaches to the discrete element modelling of ballast, both of which capture how the stress-strain behaviour of ballast changes with load cycling over a range of confining pressures. This work has been published in the journal ‘Granular Matter’ as two companion papers. 

We have also demonstrated the utility of an innovative theoretical framework for understanding and quantifying the behaviour of fibre-reinforced ballast; carried out and published an initial review of current models linking trackbed stiffness to geometry deterioration rates; and carried out measurements of S&C condition and behaviour at two locations on the UK railway network, which is giving some new insights into how the detail of the crossing design affects its performance . 

The project team has also analysed a range of vehicle and track configurations, and a variety of geometrical shapes of crossing (wing and nose), to determine the best performing shape for installation on UK infrastructure in the near future, and support stiffness. Optimisation has taken current manufacturing capabilities into account but has also evaluated more radical shapes that will become feasible in the future through advanced manufacturing technology. And we have developed a large microphone array for the quantitative measurement of airborne noise from railways in different environments under different operating conditions. 

In terms of modelling, tools and outputs for more direct use by industry, we have also edited and lead authored the new Guide to Track Stiffness, on behalf of the Cross-Industry Track Stiffness Working Group. 

The team has carried out whole-life social cost modelling of the impacts of under sleeper pads and random fibre ballast reinforcement for two case study routes.  This work has shown that the indirect economic impacts of these interventions, generated by changes in factors such as lineside noise, can be greater than the direct financial impacts for the rail infrastructure operator. However, it has also emphasised the complexity of estimating such indirect impacts; for example, under sleeper pads lead to a reduction in groundborne noise but an increase in airborne noise. 

The coming year promises to be an exciting one, as we gear up for further laboratory tests; field trials of innovative ballast solutions, such as random fibre reinforcement; and we welcome our first cohort of PhD research students.

Tell us what you think – have your say below or email


There are no comments. Why not be the first?

Add your comment


rail technology magazine tv

more videos >

latest rail news

View all News

rail industry focus

A one-industry call for skills development

20/01/2017A one-industry call for skills development

At the launch of the new Rail Sector Skills D... more >
The future of East West Rail

20/01/2017The future of East West Rail

Shortly before the end of last year, transpor... more >

editor's comment

17/01/2017Rising to the digital demand

The countdown is well and truly on for this year’s UK Rail Industry Awards (UKRIA), and the whole RTM team is looking forward to welcoming you to the fourth edition of this event on 9 February.  Held once again at Battersea Evolution, the prestigious awards ceremony promises to be an extraordinary evening, celebrating some of the major achievements of the industry in the last year. You can see the awards shortlist on pages 27-29, and read more details at If... read more >

last word

Making rail fares simpler

Making rail fares simpler

David Sidebottom, passenger director at Transport Focus, explains how a number of initiatives over the next 12 months aim to make rail fares simpler. By the end of 2017, we hope passengers will see fairer and simpler fares.  Two recent initiatives should help achieve this.  One initiative was a response to our four-year cam... more > more last word articles >

'the sleepers' daily blog

Commuters close to taking government to court over Southern crisis

06/01/2017Commuters close to taking government to court over Southern crisis

A commuter organisation looking to take the DfT to court over its handling of the Southern rail crisis have said that their legal challenge is almost ready. The Association of British Commuters (ABC) hopes to submit its full application calling for a judicial review by the end of this month, after initially raising funds for the challenge... more >
read more blog posts from 'the sleeper' >


Investing in the future of Scottish Rail

15/11/2016Investing in the future of Scottish Rail

Phil Verster, managing director of ScotRail Alliance, speaks to RTM’s Luana Salles about the recently-published ‘Investing in the Fut... more >
Maintaining the safety momentum

12/09/2016Maintaining the safety momentum

Britain’s railways are currently the safest they have ever been, but there is still room for improvement, Ian Prosser, HM chief inspector o... more >
Transforming rail in the north

06/06/2016Transforming rail in the north

As part of RTM’s series of interviews with the those at the top of the TOCs, David Stevenson caught up with Alex Hynes, Arriva Rail North&r... more >
HS2: The innovation and skills challenge

06/04/2016HS2: The innovation and skills challenge

HS2 Ltd commercial director, Beth West, on why the project needs to do things differently. HS2 will be one of the biggest infrastructure pro... more >