National Transport Library Research Database

Utveckling av en simuleringsplattform för utvärdering och design av samverkande system (Development of a simulation-based platform for the evaluation and design of cooperative systems)

  • Tapani, Andreas
  • Statens väg- och transportforskningsinstitut (VTI), Statligt forskningsinstitut, 202100-0704
Sponsors, duration, budget: Vägverket ; 2009-08-31 -- 2010-12-31 ; 850000 kronorRegistration number:
  • Vägverket AL90 B 2009:27570
Subject(s): Abstract: Simulation is a powerful method to assess impacts of emerging technologies. The SRA has expressed a need for knowledge on the combined impacts of ITS on the environment, road safety and efficiency. This activity responds to this need in relation to co-operative systems. Requirements on the simulation platform will be formulated based on the survey of the previous activity. These requirements include the main functionalities and characteristics of cooperative systems. Existing simulation models at various levels of detail will be used to implement the identified functionalities. This simulation will include both urban and rural roads to cover the wide range of operating environments in Sweden and many other European countries. This general simulation platform will be built on existing simulation models that have been developed by the partners under prior efforts, some funded by the Road Administration. RuTSim for example is a simulation model for rural roads. RuTSim has been developed with support of the Swedish Road Administration and the model was recently applied in the TTS-project “Development of simulation tools for evaluation of driver assistance systems and ITS-applications”. Mezzo is an example of a mesoscopic traffic simulation capable of simulating large scale urban networks, with thousands of cars. Mezzo’s development has also been supported by the Road Administration, and the model is particularly suited to evaluate aggregate impacts of cooperative systems, after the proper enhancements. MITSIMLab is an urban microscopic simulation model that can be used to evaluate in detail vehicle behaviour, in urban areas, under cooperative systems. The simulation platform will be applied to study the effects of a future introduction of co-operative systems (with various types of systems, and number of equipped vehicles) on Swedish networks, both rural and urban. Systems to be simulated will be selected based on the survey of the activity above. Examples of some critical questions to be addressed include: - What is the impact of the degree of penetration of cooperative vehicles on the performance of the road network, in terms of safety, congestion levels, fuel consumption? - What strategies should be employed to deal with “old” vehicles and minimize potential negative effects The development of the simulation framework will include research on the following topics: - Driver behaviour. Understanding and modelling driver behaviour in the context of cooperative systems is an important building block in using the simulation platform with high degree of fidelity and model accuracy. - Simulation based indicators of road safety and environmental impact. Today’s evaluations are however often based on aggregated indicators such as average flows and travel times. Such aggregated performance indicators can be sufficient for studies of network efficiency/accessibility. Cooperative vehicles are expected to have significant safety and environmental impacts, typically associated with details of the vehicle trajectories in the traffic stream. There is consequently a need for performance indicators based on individual vehicle trajectories. Development and evaluation of such simulation based performance indicators for road safety and environmental impact analysis of co-operative systems is therefore included in this activity.
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