Sustainable Urban Mobility Plan (SUMP) of Trieste

Mobility and Intermodality





scope of works

Sustainable Urban Mobility Plan


The development policies and measures defined in the SUMP are an innovative vision of all forms of public and private accessibility to the area (pedestrians, bicycles, public transport, cars, etc.) involving passengers and goods. The SUMP has defined a series of coordinated projects underlying a common strategy, Trieste, Sustainable City, through a mix of strategic infrastructures and mobility policies. Due to the existing interrelationships between the municipality of Trieste and the neighboring municipalities, the study area covers all the municipalities of the UTI Giuliana (Giuliana inter-municipal territorial union) for an area that has about 234,000 inhabitants overall. The preparation of the multimodal urban mobility model has made it possible to evaluate and compare the most effective actions by configuring two project scenarios for the 2025 and 2030 horizons.

Surveys (interviews and counting) were conducted to understand the needs of Trieste citizens who expressed their viewpoints on critical issues and ideas/suggestions for making it easier to “get around in Trieste” (private and public mobility, goods). The recovery and redevelopment of the central area is done through new traffic circulation regulations supported by actions to strengthen public transport (optimization of the LPT network, new intermodal hubs, new hectometric systems) and is completed by a series of actions aimed at promoting soft mobility (new bike paths and new 30 km/h zones), all aimed at decongesting the central area, favoring the car-bus-bicycle modal diversion. The Trieste Biciplan (Bike Plan) defines new bike routes, tripling the current bicycle network, and proposes 17 new 30 km/h zones. The development of a PEBA (Architectural Barrier Elimination Plan) is part of the SUMP, to identify a network of routes “accessible to all.” The SUMP was characterized from an environmental and emission perspective by comparing the current situation with the project scenarios.

The SUMP was approved by the City Council on July 27, 2021.


  • Surveys on public and private mobility with traffic flow counts carried out with radar and video cameras and interviews with citizens (online questionnaires, interviews at homes and at public transport stops)
  • Implementation and development of a multimodal simulation macromodel;
  • Defining of the actions of the Plan, simulation and comparative evaluation of project scenarios by means of indicators;
  • Strategic Environmental Assessment (SEA) and Environmental Impact Assessment (EIA);
  • organization and management of public participation processes (participatory workshops).