Validation of EDR Data for the Purpose of the Forensic Expertise

The contribution presents selected results of impact tests, based on which a comparison was made between data obtained from the EDR (Event Data Recorder) and data from an independent measuring device. The collection of data was carried out during crash tests from the years 2019 to 2020. The extraction of data recorded from different vehicle sensors was carried out using the CDR (Crash Data Retrieval) system. The aim of this paper is to focus on validating the functionality and usability of the CDR system and its outputs for forensic practice. This knowledge can help to gain significant pre-crash and post-crash information, the validity of which was verified in the presented tests by comparison with a reference independent measurement system. The comparison discussed post-crash car body acceleration, steering wheel angle, yaw rate and evaluation of pre-crash motion (e.g. driver steering intervention). The paper presents extended possibilities for accident analysis using obtained pre-collision data that were not used in the past.