| Summary: | Occasionally, investigating an accident is time-consuming, further compounding traffic congestion. This study aims to reconstruct a 3D model of an accident scene using an unmanned aerial vehicle (UAV). This study tested several flight parameters to check the accuracy and differences compared to site measurement data. The flight parameters selected were POIs and waypoint techniques. These designs can produce a good 3D model to achieve our objectives. This study tested all parameters for accuracy based on the root mean square error (RMSE) value by comparing the UAV data and site measurement data. This study tested this objective using five types of processing and different types of flight parameters (including RMSE) to determine the accuracy of the outcomes. The POI technique achieved an optimal result with centimeter-level accuracy. Furthermore, using UAVs can speed up decision-making, especially in data acquisition, and offer reliable accuracy for specific applications. This study is useful for accident investigation teams to expedite their data collection process. © 2023 by the authors.
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