Societal demand to 'minimise disturbance' from worksites while ensuring the transformation and sustainable management of ground, above-ground and underground infrastructure assets is heightened in urban areas and takes part fully in sustainable development objectives. The Discrete Urban Works Project ('projet Chantiers furtifs urbains') approaches the city with its complexity of a multitude of worksites conducted co-actively within a region, the diversity of their functions and usages, types of disturbances and environmental impacts relating to all urban services. The project seeks in particular to produce multicriterion decision support models and tools in order to anticipate worksite organisation and technical options capable of significantly attenuating the impact of worksites on the quality of life of city dwellers. Greatly marked by the systemic approach and task interaction and integration within the project, as well as by new synergies between the sciences of the engineer and the social and human sciences, the deliverables provide a validated range of design and functional levers acting on discrete project aspects: multicriterion decision support tools, effective control of underground infrastructures, industrial organisation of worksites, and worksite acceptability factors with a suitable perspective on Europe and beyond. The integration of the entire system over urban areas experiencing constant revitalisation will validate the relevancy of project output and the capacity of local authorities to better master the degree of worksite discretion for more sustainable towns and cities.