The latest report from the Intergovernmental Panel on Climate Change in 2018 highlighted the need for urgent, transformative change, on an unprecedented scale, if global warming is to be restricted to 1.5C. The challenge of reaching an 80% reduction in emissions by 2050 represents a huge technological, engineering, policy and societal challenge for the next 30 years. This is a huge challenge for the transport sector, which accounts for over a quarter of UK domestic greenhouse gas emissions and has a flat emissions profile over recent years. The DecarboN8 project will develop a new network of researchers, working closely with industry and government, capable of designing solutions which can be deployed rapidly and at scale. It will develop answers to questions such as: 1) How can different places be rapidly switched to electromobility for personal travel? How do decisions on the private fleet interact with the quite different decarbonisation strategies for heavy vehicles? This requires integrating understanding of the changing carbon impacts of these options with knowledge on how energy systems work and are regulated with the operational realities of transport systems and their regulatory environment; and 2) What is the right balance between infrastructure expansion, intelligent system management and demand management? Will the embodied carbon emissions of major new infrastructure offset gains from improved flows and could these be delivered in other ways through technology? If so, how quickly could this happen, what are the societal implications and how will this impact on the resilience of our systems? The answer to these questions is unlikely to the same everywhere in the UK but little attention is paid to where the answers might be different and why. Coupled with boundaries between local government areas, transport network providers (road and rail in particular) and service operators there is potential for a lack of joined up approaches and stranded investments in ineffective technologies. The DecarboN8 network is led by the eight most research intensive Universities across the North of England (Durham, Lancaster, Leeds, Liverpool, Manchester, Newcastle, Sheffield and York) who will work with local, regional and national stakeholders to create an integrated test and research environment across the North in which national and international researchers can study the decarbonisation challenge at these different scales. The DecarboN8 network is organised across four integrated research themes (carbon pathways, social acceptance and societal readiness, future transport fuels and fuelling, digitisation, demand and infrastructure). These themes form the structure for a series of twelve research workshops which will bring new research interests together to better understand the specific challenges of the transport sector and then to work together on integrating solutions. The approach will incorporate throughout an emphasis on working with real world problems in 'places' to develop knowledge which is situated in a range of contexts. £400k of research funding will be available for the development of new collaborations, particularly for early career researchers. We will distribute this in a fair, open and transparent manner to promote excellent research. The network will help develop a more integrated environment for the development, testing and rapid deployment of solutions through activities including identifying and classifying data sources, holding innovation translation events, policy discussion forums and major events to highlight the opportunities and innovations. The research will involve industry and government stakeholders and citizens throughout to ensure the research outcomes meet the ambitions of the network of accelerating the rapid decarbonisation of transport.

Our vision for the TransiT Hub is to harness the transformative power of Digital Twinning, and associated digital technologies, to solve the most pressing problems of our age - the rapid and radical decarbonisation of transport , holistically, across all modes - Road, Rail, Air and Maritime, and at a national scale. The TransiT Hub will create a new interdisciplinary challenge-led national digital twinning capability to deliver scalable solutions of the integration and decarbonisation of transport, providing the thought leadership and coordination it requires. This is an urgent response to the climate emergency that will advance understanding of a complex and adaptive system, reducing uncertainty and risk for time-critical investments into sustainable, ethical and affordable decarbonisation. It will be centred on expert problem articulation of the challenges, ensuring planners, operators, and policy makers, will use this new capability to deliver national transformation and realise good climate, economic and social outcomes across the stakeholder community, as well as providing a blueprint for other sectors. While past approaches utilised small-scale, real-world trials and progressive scale-up, the need for rapid transition to a low-carbon economy, combined with the increasingly complex interaction between transport modes precludes this approach. This situation is currently holding back private and public investment and risking the UK's leadership in tackling climate change. Scalable digital twinning offers a way of quickly assessing and narrowing the decarbonisation options for the complex whole transport system. To? realise our vision we will co-create 9 Federated Transport Digital Twins across modes and passenger/freight types, culminating in a Federated Transport System of Systems (FTSoS). These FTDTs will use novel capabilities to support the design, development, delivery and operation of a reliable, secure, resilient, inclusive, decarbonised transport system at lowest cost and delivering best value. We will use an active and agile learning-by-doing approach, that can adjust to stakeholders, withstand scrutiny, and feedback new knowledge to the next iteration. The creation of the FTSoS will address a new paradigm of Whole System Digital Twinning - bringing together, coordinating and extending existing DTs in the sector, delivering capabilities currently unachievable within siloed mode specific DTs. Our approach addresses the challenges in interoperability, security and resilience, human-centred design, data management, policy delivery, and new business models, whilst leveraging existing DTs, and Cyber Physical Infrastructure, and growing national digital twinning expertise and capability. This will be shared with, and benefit from, wider national DT programmes, including NDTP and Energy System DT (ENSIGN), and other strategic investments such as DARE and the EPSRC Transport DT Network+, as well as linking with representative bodies and collaborations such as DfT's TRIB and the DT Hub. The Hub will bring together seven distinguished higher education institutions, UofG, HW, UoL, UoB, CU, UoC and UCL that reflect a careful balance across modelling transport modes and the cross cutting themes essential for federated digital twinning including human factors, cyber security,? connectivity, policy, economics, and digital twinning tools. Furthermore, significant in kind support has been committed by external partners across government and industry partners, including the Department for Transport and over 40 organisations across the transport sector. Our foundational work will be explored through application focused use cases developed with our industrial and academic partners providing practical anchoring of the research; knowledge transfer through bi-directional secondments and the generation of evidence to support robust policy