Study on estimation of traveling trajectory using the recording data in the event data recorder
2022-01-1011
03/29/2022
- Event
- Content
- In a traffic accident investigation, it is important to accurately understand the traveling trajectory of the involved vehicle in order to investigate the cause of the accident. Currently, many event data recorders (EDRs) document the operating status of some electronic control devices and vehicular behavior but do not record the traveling trajectory. If the traveling trajectory can be estimated from the EDR data, it is possible to obtain the relevant information for investigating the cause of the accident. In this paper, for the purpose of using the EDR data in accident investigation, we examined the estimated traveling trajectory based on the data obtained from the experiment. In the experiment, the high-precision device measuring a positioning (GPS) and vehicular behavior was installed in a test vehicle equipped with an EDR. This test vehicle ran on specified test courses to acquire both EDR data and measuring device data, simultaneously. As a result, in the case where the vehicle ran at mild vehicular behavior (curve, etc.), the EDR trajectory and the GPS positioning trendlines are approximately in phase. On the contrary, in the case where the vehicle ran at rapid vehicular behavior (slalom at fast speed), the gap between the EDR trajectory and the GPS positioning trendlines was wider than the gap of the same trendlines at mild vehicular behavior. The EDR trajectory at rapid vehicular behavior could not be sufficiently reproduced since the sampling interval of the EDR data was long. It implies that it is possible to estimate the traveling trajectory from EDR data at mild vehicular behavior. Results point out that a shorter EDR sampling interval is required to obtain the EDR trajectory at rapid vehicular behavior.
- Citation
- Matsumura, H., and Itoh, T., "Study on estimation of traveling trajectory using the recording data in the event data recorder," SAE Technical Paper 2022-01-1011, 2022, .