Comprehensive study of Road Roughness in India

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Road roughness is the deviation of the pavement surface from a true planar surface with characteristic dimension that affect vehicle dynamics, ride quality, dynamic load and drainage , for example longitudinal profile, transverse profile, and cross slope(ASTM E867). By causing vehicle vibrations, roughness has a direct influence on vehicle wear, ride comfort, and safety. The relationship between vehicle operating cost and road roughness are well established through several studies conducted in India and abroad. Roughness measurements are an important factor in making decisions towards spending limited budgets for maintenance and improvements. Due to this, specifications for roughness have been adopted for various highway engineering agencies (Sayers et al, 1986). The parameters of longitudinal and horizontal variation of roughness are wave irregularities, wavelength, amplitude, frequency, speed (vehicle characteristics, tyres, seats suspension, body mount, weight, etc) and perception (passenger sensibilities to acceleration, speed, resonance and ...
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