Weigh-in-motion (WIM) systems have been increasingly used to screen potentially overweight vehicles. However, under slow speed conditions (less than 10 mph), WIM scales appear to be capable of estimating static gross vehicle weight to within -10% with 95% confidence. This report presents findings from a year-long field test of a slow-speed weigh-in-motion (SWIM) system. A regression model was used to improve accuracy and precision by accounting for the effects of time, weather, and vehicle speed. Following correction, accuracy improved to 12 of 1% at both the axle and vehicle levels. Also following correction, 95% of the observations were within 6.8% of the static scale weight at the axle level. At the vehicle level, precision improved to within 4.4%. The precision of the corrected data for vehicles and tandem axles approaches the levels stated by the ASTM in its standard specification for Type IV (enforcement applications) WIM systems.


    Access

    Access via TIB

    Check availability in my library


    Export, share and cite



    Title :

    Oregon DOT (Department of Transportation) Slow-Speed Weigh-in-Motion (SWIM) Project


    Contributors:

    Publication date :

    1998


    Size :

    64 pages


    Type of media :

    Report


    Type of material :

    No indication


    Language :

    English




    Slow Speed Weigh-in-Motion Study

    M. De Nicholas | NTIS | 1989


    The Oregon experiment with automatic vehicle identification devices and weigh-in-motion systems

    Krukar,M. / Henion,L. / Oregon Dep.of Transp.,Highway Div.,Planning Section,US | Automotive engineering | 1985



    Bridge weigh in motion

    Dolcemascolo, V. / Sjögren, Leif | Wiley | 2009


    Weigh-in-Motion Instrumentation

    F. Moses / M. Kriss | NTIS | 1978