The UK's transport infrastructure is one of the most heavily used in the world. The rail network takes 50% more daily traffic than the French network; the M25 between junctions 15 and 14 carries 165000 vehicles daily; London Underground is Europe's largest subway. The performance of these networks is critically dependent on the performance of cutting and embankment slopes which make up £20B of the £60B asset value of major highway infrastructure alone. Many of these slopes are old and suffering high incidents of instability (increasing with time). Our vision is to create a visualised model of transient water movement in infrastructure slopes under a range of current and future environmental scenarios, based on a fundamental understanding of earthwork material and system behaviour, which can be used to create a more reliable, cost effective, safer and more sustainable transport system. The impact of the improved slope management will be highly significant in both direct economic and indirect social and economic terms: planned maintenance costs 10 times less and reduces delays caused by slope failure. This proposal offers a unique opportunity to unite 6 academic institutions and coalesce their field, laboratory and computing facilities; with a large cohort of PhD students and experienced stakeholder community we will undertake world leading science and create a long-term legacy. Individually, the partners in this proposal, in collaboration with key infrastructure owners and engineering companies, have been responsible for the instrumentation of 15 cut slopes and embankments, the development of numerical models which couple hydrological and geotechnical effects, and the development of laboratory and filed testing to provide parameters to populate these models. These studies have helped to define the type of problem that is being faced and begin to understand some of the interactions between weather, soil and vegetation. However, further research is required in order to better understand material behaviour (particularly the composite behaviour of soil, water, air and vegetation); slope system behaviour (particularly the effects of temporal and spatial variations of material properties) and the relationships with environmental effects and engineering performance. Furthermore, the integration of the material and slope behaviour with that of the behaviour of the infrastructure network as a whole has thus far not been possible. It is important for the sustainable management of infrastructure slopes (assessment, planning, repair, maintenance and adaptation) to have models that can assess the likely engineering performance of infrastructure slopes, both now and in the future. Recent model development has started to consider the input of weather patterns, and can therefore model the potential effects of future climate. However it has become clear that these models are sensitive to the way in which a number of the physical processes and properties are incorporated, many of which are complex and difficult to quantify directly. A better understanding of the interactions between earthworks, vegetation and climate is required to formulate robust guidance on which maintenance approaches should be adopted and how they should be applied. iSMART will use a combination of field measurements, lab testing and development of conceptual and numerical models to investigate the uncertainties and knowledge gaps enumerated above and to visualise the complex interactions taking place over time and space. This knowledge will help the managers of the UK's transport infrastructure to identify problem sites, plan and prioritise maintenance activity, and develop assessment and adaptation strategies to ensure future safety and resilience of geotechnical transport infrastructure.

The majority of the world's railways - including all main lines in the UK - are currently on ballasted track. Although there have been developments in component specifications and materials, the principles of the system have changed little over the past 150 years. Ballasted track has generally been considered to offer the optimum solution in terms of construction cost, stiffness and drainage properties, and ease of modification: thus although more highly engineered track forms have been used (e.g. in Japan, Germany and China), ballasted track has been employed both for upgrades such as the UK West Coast Main Line and for new high speed lines including HS1 (UK), TGV (France) and AVE (Spain). However, the limitations of ballasted track as currently constructed are becoming more apparent and more significant as the demands placed upon it have increased. This has led to higher than expected maintenance requirements and costs, and demonstrates that a transformation in track performance - by retro-fit measures for existing ballasted track, or by an informed decision in favour of an alternative track system in the case of large-scale renewals - is essential if the Government's aspirations of reduced cost and increased capacity for rail transport are to be realised. This Programme Grant will bring about a step-change improvement in the engineering, economic and environmental performance of railway track making it fit for a 21st century railway, by developing new techniques for its design, construction and maintenance. By obtaining a better understanding of the behaviour of track components, the interactions between them and their response to external loading and environmental conditions, the performance of railway track can be significantly enhanced. Improved understanding will allow the development of more effective and efficient maintenance and renewal strategies, leading in turn to reduced costs, increased capacity and improved reliability. The Programme Grant will also enable a radical overhaul of current railway track design appropriate for both new build (e.g. HS2) and upgrades to meet current and future train loading requirements more efficiently than is at present possible. Meeting these challenges will require a coordinated programme of research to investigate how the various components of the track system relate to each other and to external factors. This will involve a series of inter-related experiments together with supporting mathematical and numerical modelling, field monitoring and observation. The outputs of these studies will feed into economic modelling work, leading to the production of a decision-support tool, for use by industry, to appraise the cost implications of using different track technologies in combination with specific external factors. The aims of this Programme Grant can only be achieved by combining a variety of skills and techniques. The research team therefore comprises world-leading engineers and scientists from different disciplines and universities, working together to apply their collective expertise. A well-defined organisational structure and adaptable methods of operation will together provide a high level of integration and synergy between the various research areas and activities; excellent communications between the researchers, institutions and industry partners; flexibility in the allocation and use of resources; agility and responsiveness in research direction; proactive management of risk; and ownership and early uptake of research results by industry.

Safety performance of the UK railways has improved significantly in recent decades, though over the same period costs have also increased, resulting in an efficiency gap between current industry costs and comparable railways elsewhere in Europe (McNulty 2011). This gap can be partly attributed to the use of overly conservative safety standards, with the potential to be replaced by calculated risk controls accompanied by appropriate risk modelling and assessment. By identifying low risk locations or routes and areas where the risk controls deliver little or no additional safety benefit, the industry could achieve significant cost and efficiency savings through the removal of unnecessary/over-prescriptive control measures (Griffin & Holloway 2012). The proposed research will deliver a model and toolkit to improve prediction of risk to rail infrastructure using environmental information, including weather conditions in real time or, historically, according to user specified scenarios. This adds several new dimensions to RSSB's Safety Risk Model (SRM) and thus provides significant potential to improve risk calculations and controls and provide cost efficiencies for managing the safety of the UK rail infrastructure. The proposed research identifies clear potential advantages to the RSSB stakeholder, who stand to benefit from a much improved Safety Risk Model, taking environmental factors into account. Such benefits would be shared with other rail industry stakeholders, including Network Rail, Department of Transport and other researchers, all informing government rail safety policy, investment and spending decisions. If successful, the developed tool has the potential to be "disruptive", changing "business as usual" practices at the RSSB stakeholder and related rail infrastructure organisations. The tool can provide the introduction of real-time environmental safety risk modelling which has not previously been available in the UK, or reported to be in place elsewhere.

Project Partners: Arup, Atkins, Canal & River Trust, Environment Agency, Geosense, High Speed Two, Highways England, ITM Monitoring, Kier, National Grid, Network Rail, Rail Safety & Standards Board, Scottish Canals, Transport Scotland. The Challenge: The development of the Proactive Infrastructure Monitoring and Evaluation (PRIME) system is driven by the increasing rate and severity of failures in flood defence, transportation, and utilities earthworks. This is due to aging assets (many canal and rail earthworks are over a hundred years old) and more extreme weather events (e.g. the extreme rainfall during winter 2013-14 & 2015-16). Asset failures are enormously expensive, costing hundreds of millions of pounds per year in the UK alone, not to mention risks to human health and disruption of transport systems, utilities and the wider economy. Assessment of the condition of geotechnical assets is essential for cost effective maintenance and prevention of hazardous failure events. Early identification of deteriorating condition generally allows low cost preventative remediation to be undertaken (post failure interventions are typically ten times more expensive) and reduces the risk of catastrophic failures. Conventional approaches to condition monitoring are often inadequate for predicting earthwork instability. They are heavily dependent on surface observations - i.e. walk-over surveys or airborne data collection. These approaches cannot detect the subsurface precursors to failure events; instead they identify failure once it has begun. There is growing recognition among infrastructure asset owners, managers, and consultants that automated monitoring technologies have the potential to reduce these costs and risks by providing continuous condition information and early warnings of failure. Aims & Objectives: The primary objective is to deliver a new remote condition monitoring and decision-support system for assessing the internal condition of safety critical geotechnical assets. This will be realised by implementing a fully automated software workflow for data analysis and information delivery, building upon the recently developed PRIME hardware platform. The integrated PRIME system (i.e. hardware & software) will combine emerging geophysical ground imaging technology with wireless telemetry, 'big data' handling, and web portal access. It will form the basis of a new generation of intelligent decision-support technology capable of 'seeing inside' vulnerable earthworks in near-real-time using diagnostic imaging methods routinely used in medical physics. By the end of this project, the software and hardware will be demonstrated to technology readiness level (TRL) 7 at new and existing stakeholder sites, ready for commercialisation and use by the wider stakeholder community. Benefits: The key benefits of PRIME to asset owners include cost savings through minimising unnecessary renewals and providing early warning of failure events, time savings associated with fewer manual site visits, and risk reduction by preventing dangerous earthworks failures, and minimising the need for people to enter potentially hazardous operational environments. Geotechnical monitoring providers, consultants & contractors will benefit through new cutting-edge geotechnical monitoring services and, for the first time, near-real-time volumetric subsurface monitoring information. Key Deliverables & Outputs: - New software to fully automate PRIME data processing and information delivery - including a web-based decision support dashboard. - Demonstration of the complete PRIME system at existing rail and waterways pilot sites, and new highways, power transmission and flood defence sites - establishing TRL 7 (demonstration in an operational environment). - A commercialisation strategy agreed with project partners to ensure technology translation to the stakeholder community. Duration: 18 months Cost: £183,000 (at 80% FEC)

Railways have a vital role in any 21st century transport policy. No other form of transport could cope with the large numbers of people transported into and around major cities every day by commuter railways and metro systems. Trunk lines can shift vast quantities of freight, keeping thousands of lorries off our roads, and intercity routes are increasingly competitive for speed and convenience with domestic air transport. Even in rural areas, railways often offer more reliable and attractive public transport than buses. Environmentally, railways outperform road vehicles and aircraft in terms of energy efficiency, air pollution and noise. However, railways are operating at or beyond capacity. The system can take a long time to recover from a small delay, and disruption on one part of the network can spread rapidly to affect services elsewhere. There is little time for vital maintenance, and last year one train company had to re-write its timetable completely because of unacceptably poor reliability. Travel is becoming increasingly popular, and if the Government's plans to introduce road charging for car journeys cause just 1% of people to switch to rail, the system will be overwhelmed. Rail Research UK is a consortium of twelve university-based groups carrying out research across a range of areas from engineering to human factors and transport economics, that will help to reduce the complexity and need for maintenance of railway systems, reduce their environmental impacts, increase their capacity and improve their reliability, attractiveness and safety.