Fuel Consumption of Vehicles as Affected by Road-Surface Characteristics

    Published: Jan 1990

      Format Pages Price  
    PDF (232K) 17 $25   ADD TO CART
    Complete Source PDF (11M) 17 $109   ADD TO CART


    The relationship between components of vehicle operating costs (VOCs) and highway characteristics has been studied by many researchers over the years, but many issues still remain to be resolved. In particular, although fuel consumption should be the easiest component to model, there is considerable variance between reported results. A comprehensive experiment was therefore designed to investigate the effects of road-surface characteristics on fuel consumption, as a first step toward establishing reliable VOC relations for South African conditions. A passenger car, two medium-sized trucks, and two buses were chosen for coast-down tests to determine rolling resistance over a series of road sections, covering the ranges of surface conditions encountered locally. The models developed predict that at constant speeds on level roads, road-surface characteristics can affect the fuel consumption of passenger cars by up to 7% and that of trucks and buses by up to 20%. It is believed that these models can be applied with confidence in practice, considering the comprehensive nature of the experiment.


    vehicle operating costs (VOCs), fuel consumption, rolling resistance, coast-down tests, road roughness, surface texture, tire pressure

    Author Information:

    du Plessis, HW
    Program managerprogram manager, Pavement Construction TechnologyStrategic ManagementCSIR, Pretoria,

    Visser, AT
    Professor of Civil Engineering, University of Pretoria, Brooklyn, Pretoria,

    Curtayne, PC
    Program managerprogram manager, Pavement Construction TechnologyStrategic ManagementCSIR, Pretoria,

    Committee/Subcommittee: E17.51

    DOI: 10.1520/STP23383S

    CrossRef ASTM International is a member of CrossRef.