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Whole-body vibration exposure: a comprehensive field study

N Ozkaya¹, B Willems, D Goldsheyder

¹Occupational & Industrial Orthopaedic Center, Hospital for Joint Diseases, New York University, NY 10014.

American Industrial Hygiene Association Journal

|December 1, 1994

Summary

Train operators in a major subway system experienced significant whole-body vibration. Six of twenty lines exceeded daily exposure limits, with train speed being the primary factor.

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Area of Science:

Occupational Health and Safety
Transportation Engineering
Human Factors and Ergonomics

Background:

Whole-body vibration (WBV) poses health risks to transportation workers.
Subway operators are exposed to continuous mechanical vibrations during operation.
International standards, such as ISO 2631, provide guidelines for acceptable WBV exposure.

Purpose of the Study:

To quantify WBV exposure levels for subway train operators.
To compare measured WBV levels against ISO 2631 recommendations.
To identify key factors influencing WBV transmission and their impact.

Main Methods:

Conducted a comprehensive field study across a metropolitan subway system.
Collected triaxial vibration data on all subway lines and car types.

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Analyzed over 100 hours of data, calculating time-weighted averages per ISO 2631 procedures.

Main Results:

Six out of twenty subway lines exceeded the recommended daily WBV exposure limits.
Train speed was identified as the most significant factor affecting vibration levels.
Vibration measurements were taken systematically across different lines and directions.

Conclusions:

Certain subway lines present unacceptable WBV exposure risks to operators.
Mitigation strategies focusing on train speed may reduce operator exposure.
Adherence to ISO 2631 is crucial for assessing and managing occupational vibration.