This report will focus on the braking performance of the vast majority of truck tractors, i.e., two and three axle truck tractors with a GVWR of 70,000 pounds or less, and truck tractors with four or more axles and a GVWR of 85,000 pounds or less. These will be referred to in the remainder of this report as 'normal duty' truck tractors (as compared to 'severe duty' truck tractors, i.e., those three-axle truck tractors with a GVWR greater than 70,000 pounds, and truck tractors with four or more axles and a GVWR greater than 85,000 pounds). FMVSS No. 121 also contains maximum allowable stopping distances for vehicles that cannot attain a speed of 60 mph in two miles of driving on a flat, level roadway. If a vehicle cannot attain a speed of 60 mph, it is tested to ensure that it can meet the maximum permitted stopping distance requirement from an initial speed that is four to eight mph less than the maximum speed that is attainable.


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    Title :

    Experimental Measurement of the Stopping Performance of a Tractor-Semitrailer from Multiple Speeds


    Contributors:
    W. R. Garrott (author) / M. Heitz (author)

    Publication date :

    2011


    Size :

    47 pages


    Type of media :

    Report


    Type of material :

    No indication


    Language :

    English




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