'Underground. The Way to the Future' (abstracts book 384 pages + full paper CD-ROM 2418 pages) covers important aspects of modern underground infrastructures: development and use of underground space; project planning and implementation (construction management, risk control, cost estimation and scheduling, contracting practices); design and analysis methods and considerations; construction technology developments; tunnel operation (safety, maintenance, rehabilitation and repair); case histories (learning from failures, long deep tunnels, underground construction for hydropower).