Descripció del projecte
In terms of sustainability, traffic is currently a significant challenge for urban areas, where the pollution, congestion and accidents are negative externalities, which have strongly affected the health and economy of cities. The increasing use of private vehicles has further exacerbated these problems. In this context, the development of new strategies and policies for sustainable urban transport has made transport planning more relevant than ever before. In particular, dynamic network models provide a means for representing dynamic traffic behavior; in other words, they provide a temporally coherent means for measuring the interactions between travel decisions, traffic flows, travel time and travel cost. Simulation-based DTA models, are the most efficient computationally to deal with networks of significant size. Simulation-based formulation separates the iterative process into two main components: A method for determining the new time dependent path flows. A dynamic network loading (DNL) method, which determines how these path flows propagate along the corresponding paths.
The use of Simulation Based Dynamic Traffic Assignment for the analysis of mobility patterns and support of traffic management strategies and also, the modeling of public transport systems in urban/metropolitan areas, have been research topics of the SGR Research Group IMP-Information Modeling and Processing addressed in recent years through the participation in National Research Projects (In4Mo, Reference: TSI-020100-2010-690, and MITRA, Reference TRA2009-14270, Proyectos RER_TRANSPUB, References TRA2014-52530-C3-3-P, TRA2016-76914-C3-1-P) and European (MULTITUDE (Methods and tools for supporting the Use, caLibration and validaTIon of Traffic simUlations moDEls), Action (TU0903) supported by the EU COST office (European Cooperation in Science and Technology). A Doctoral Thesis and various papers (M.P. Linares et al. Validation of a New Multiclass Mesoscopic Simulator Based on Individual Vehicles for Dynamic Network Loading; A mesoscopic simulation based dynamic traffic assignment model; An Approach to Multiclass Mesoscopic Simulation Based on Individual Vehicles for Dynamic Network Loading, Francisco López-Ramos, Conjoint design of railway lines and frequency setting under semi-congested scenarios, E. Codina et al. A heuristic method for a capacitated transit assignment model with strategies) consolidated the achieved results.
However, the flows considered in these approaches are usually restricted only to passenger vehicles, but the current trends are asking for new developments, looking for sustainable solutions supported by public transport (PT) and its combination with the emergent new mobility services, as for example, the MaaS Ride-pooling services. Therefore, the main objective of the research in this thesis will be to contribute to a simulation-based assignment multimodal dynamic disaggregate traffic assignment. The solution will take into account the various possible modalities of combined transportation modes that the new urban mobility concepts and the traditional public transportation systems offer to the users, including both time-table based and frequency based public transport systems. Accordingly to the previous objectives, the research will be focused on
1. Exploring the simulation of road-based public transport, and MaaS vehicles within a private transport simulation-based dynamic assignment (namely the Visum SBA assignment), accounting for the explicit path choices and dynamic rerouting in the new multimodal scenarios.
2. Modeling modal choices of person between PT-only, MaaS-only, “PT with MaaS as feeder” (PT&MaaS)
3. Modeling Path choice for PT-only inspired by Visum schedule-based assignment
4. Modeling Path choice for MaaS-only as per existing MaaS Operator dispatcher
5. Modeling Path choice for PT&MaaS from a new PT&MaaS Dispatcher, accounting for:
5.1 Operational decision how to serve trip requests
5.2 If PT & MaaS is used, split spatially between main haul and feeder legs
5.3 Time MaaS request, so that connection to/ from PT guaranteed from a new logic accounting for time windows in order to ensure time arrival
requirements of MaaS users.
