MultiSafe

In the MultiSafe project, the two Fraunhofer Institutes EMI and IPM carried out a study on the reproducibility of real recorded vehicle trajectories using the OpenPASS traffic flow simulation environment for a complex urban scenario, which is being continuously developed and supported by the automotive industry. An urban T-junction was chosen as the scenario. Various methods for recording, processing real traffic and semi-automated trajectory detection were investigated and the feasibility of the scenario based on the ASAM-OpenDRIVE standard (ASAM e.V. 2021) and the semi-automated re-simulation of recorded scenarios in the simulation environment using the integrated behavior models were evaluated. The scenarios to be evaluated were recorded by Fraunhofer IPM at a T-junction measured by laser scanning with a Sony Alpha R7 camera. The camera was positioned so that the scenarios could be filmed from above. With the help of the laser scanner, the images extracted from the videos were projected onto the street level. A neural network was used to detect the road users and calculate their centers of gravity on the road. The positions of the focal points in the images can be used to calculate the vehicle positions on the road and thus compile the trajectories. The T-junction selected and measured for the images was converted by Fraunhofer EMI into the ASAM standard OpenDRIVE, which is comprehensible for the OpenPASS simulation environment. Various identified workarounds and modified configurations in the definition of the scenery and the standards made it possible to map the subsequent traffic from any direction. For the re-simulation of the recorded scenarios, the vehicle-following model (FFM) implemented in OpenPASS was examined for its suitability for simulating real traffic at urban intersections. The comparison of measured and simulated trajectories of selected scenarios showed good agreement. It was also possible to simulate initial traffic situations with interaction between drivers and pedestrians. The focus of the scenarios was primarily on non-motorized road users, whose protection can be increased in the future thanks to the more realistic simulations.