Trucking fleets are increasingly installing video event recorders in their vehicles. The video event recorder system is usually mounted near the vehicle's rear view mirror, and consists of two cameras: one looking forward and one looking towards the driver. The system also contains accelerometers that record lateral and longitudinal g-loading, and some may record vehicle speed (in mph) based on GPS positions. The unit constantly monitors vehicle acceleration and speed, and also records video. However, the recorded data is only stored when a preset acceleration threshold is met. The primary use of the system is to assist fleets with driver training and education, but the recorded data is also being used as a tool to reconstruct accidents. By integrating the accelerometer data, the vehicle speed and distance traveled during the event can be calculated. However, the calculated speeds and distances from video event recorder data may differ from reconstructions based on data taken from engine control modules (ECM's) or classic reconstruction techniques. The objective of this study was to determine the source(s) of these differences and to determine whether or not the differences could be accounted for and corrected. Results of the study indicate that the differences can be corrected by analyzing the recorded video and matching the calculated results to known vehicle speeds, i.e., when the vehicle comes to rest. In cases where the vehicle does not come to rest during the recorded event, the differences can only be corrected if the vehicle in question can be accurately modeled.


    Access

    Check access

    Check availability in my library

    Order at Subito €


    Export, share and cite



    Title :

    Analysis of Video Event Recorder Data Used for Accident Reconstruction


    Additional title:

    Sae Technical Papers


    Contributors:

    Conference:

    SAE 2014 Commercial Vehicle Engineering Congress ; 2014



    Publication date :

    2014-09-30




    Type of media :

    Conference paper


    Type of material :

    Print


    Language :

    English




    Vehicle Speed Accident Reconstruction Based on Event Data Recorder

    Guo, Fenghu / Qian, Yubin / Li, Wei | IEEE | 2019


    Crash severity: a comparison of event data recorder measurements with accident reconstruction estimates

    Gabler,H.C. / Hampton,C.E. / Hinch,J. et al. | Automotive engineering | 2004


    An Inexpensive, All Solid-state Video and Data Recorder for Accident Reconstruction

    Leigh, D. L. / Bardsley, R. S. / Yerazunis, W. S. et al. | SAE Technical Papers | 1999


    An Inexpensive, All Solid-state Video and Data Recorder for Accident Reconstruction

    Yerazunis, W. S. / Leigh, D. L. / Freeman, W. T. et al. | British Library Conference Proceedings | 1999


    An inexpensive, all solid-state video and data recorder for accident reconstruction

    Yerazunis,W.S. / Leigh,D.L. / Freeman,W.T. et al. | Automotive engineering | 1999