AI:Liner will enhance the asset management life cycle of sewer networks by designing, developing and validating a suite of cutting-edge technological and digital solutions. The project delivers a modular and interoperable end-to-end asset management tool chain that optimizes planning, operations, maintenance, investment, and reduces costs and risks of unexpected failures. It leverages the momentum of European utilities' digitalization efforts, building on the increasing availability of CCTV inspection data, AI-based fault detection, and recent advances in in-situ monitoring techniques to support the climate-neutral and resilient transformation of Europe's sewer infrastructure. AI:Liner empowers utilities and municipalities to identify intervention needs, enabling strategic decisions on when and where to inspect and rehabilitate sewers with the most appropriate technology, ultimately promoting the adoption of repair and rehabilitation techniques over the traditional excavation required for renewal. AI:Liner promotes the acceptance, trustworthiness and accountability of data-driven solutions, fostering a culture of trust, transparency and responsible use of data among European utilities and municipalities. By bringing together an interdisciplinary consortium that leverages expertise in infrastructure management, digitalization, and social sciences and humanities, AI:Liner enhances the digital skills of the utility workforce and integrates AI ethical principles at the core of technology development, ensuring the sustainable, responsible, and unbiased use of AI. AI:Liner strives to accelerate the digital and green transitions of the water and infrastructure sector, aiding European utilities in delivering high-quality services, maintaining affordable costs, and preserving infrastructure for future generations.