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Related Documents Modelling transport flows
  Update of the NEAC modal.pdf
Leest, E.E.G.A. van der
The NEAC model and information system consists of models and methods for constructing databases describing the current freight transport flows and for developing forecasts of future freight transport flows. NEAC describes all intra- and inter-regional freight transport in Western and Eastern Europe by transport mode and by commodity type. Results are expressed in total weight of the goods. In NEAC, a classical four step modelling approach is used. This approach consists of the following steps: 1.Trade and transport generation 2.regional distribution 3. Mode choice; 4. route choise/ assignment The third step, the model for mode choice, is the subject of this paper. In 2005, NEA carried out a research project to update the NEAC modal-split model. This paper presents the assumptions, highlights the results and also mentions the differences between the previous and the new version. The goal of the research project was to develop a model that could replace the outdated modal-split model. As well as the calibration of updated parameters, the aim was to also incorporate the transport mode short sea in the model. To achieve this NEA has developed and calibrated a completely new model. An analysis of the effects of the new NEAC modal-split model on forecasts of main European transport flows is presented. The modal-split model for freight transport within the TRANS-TOOLS research project is based on the new NEAC model. The goal of TRANS-TOOLS, which is co-funded by the European Commission (DG-TREN) under the 6th Framework Programme for Research and Development, is to produce European transport network models to overcome the shortcomings of current models.
Practicalities in Using the ETIS BASE AUEB 15Aug09.pdf
aueb
Environment Transport Integrated planning System (ETIS) is a state-of-the-art system, supporting the integration of all tasks of a transportation planning process, i.e. travel demand forecasting, development of infrastructure and policy scenarios, impact assessment, cost-benefit analysis and comparison of alternative scenarios among others. Strategic Planning of Urban Transport Infrastructure Development has always been a critical issue for decision makers since it involves: • Analysis of land use and transport infrastructure development relationships • travel demand forecasting and modeling • development of transport infrastructure development scenarios • impact assessment of the scenarios vis-à-vis traffic and environmental conditions of the study area • evaluation of alternative solutions Transport Planners usually deal with time consuming and respective tasks, which involve: • handling of big volume of data (i.e. socio-economic data, land use data, transport cost data etc.) used for Traffic modelling and forecasting, • creation of transport infrastructure supply inventory (including all spatial / geometrical and operational characteristics of the Road and Public Transport network) • specification of alternative solutions, (sets of road and Public Transport Infrastructure with all the operational characteristics the planner desires to test on them) • calculation of indices for assessing the impacts of alternative proposals,
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