STP884

    Relationships Between Vehicle Speed, Ride Quality, and Road Roughness

    Published: Jan 1985


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    Abstract

    The relationship of vehicle response to road roughness and speed is quantified from two major data sets obtained from response-type roughness measuring systems used in Brazil. The average rectified slope and average rectified velocity (ARV) response statistics are expressed in terms of speed and a reference roughness scale in a generalized relationship applicable to most road surfaces. Corrugated surfaces require explicit analysis. The effect of road roughness on average traffic speed, that is, the driver's response, is quantified as a function of the vehicle's ARV response and vehicle type; the limiting values estimated for six vehicle classes range from 150 to 280 mm/s. The issues of roughness measurement speed, a reference speed for a universal roughness scale, and the relationship between road roughness and vehicle operating costs are discussed.

    Keywords:

    roughness, road roughness, response-type measuring systems, ride quality, speed, road user costs, vehicle calibration, vehicle operating costs, road surface profile


    Author Information:

    Paterson, WDO
    Senior highway engineer and former transport economist, The World Bank, Washington, DC

    Watanatada, T
    Senior highway engineer and former transport economist, The World Bank, Washington, DC


    Paper ID: STP34596S

    Committee/Subcommittee: E17.31

    DOI: 10.1520/STP34596S


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