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Relating Road Roughness and Vehicle Speeds to Human Whole Body Vibration and Exposure Limits

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Every road authority targets good ride quality in their pavement management. Ride quality depends strongly on the experienced in-vehicle vibration, induced by road roughness. International Roughness Index (IRI) is the most common way to describe road roughness, while ISO 2631-1 defines how to quantify human whole-body vibration (WBV), experienced by the driver and the passengers during the ride, in relation to health and comfort. IRI is defined by means of a quarter car model. In this paper the same model is used to get a relationship between road roughness, speeds and vertical human WBV. The new EU Physical Agents Directive--Vibration (PAD--V) contains action and exposure limits for WBV, with respect to the exposure of professional drivers. The derived relationship, therefore, helps us to use ISO 2631 and PAD-V to justify management policies for roughness and speed limits, for usage in IRI-based pavement management systems.
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Keywords: Pavement management; Ride quality; Road roughness; Speed; Whole-body vibration

Document Type: Research Article

Affiliations: 1: Saven EduTech AB/Blekinge Institute of Technology Box 504 183 25 Täby Sweden 2: Swedish National Road Administration Consulting Services Pavement Engineering Division 781 87 Borlänge Sweden

Publication date: 01 January 2002

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