Abstract
A number of studies have shown an association between whole-body vibration (WBV) exposure and the onset and development of low back pain among professional vehicle operators. This study measured WBV exposures from 12 drivers who operated four different types of solid waste collecting trucks during part of their regular work shift. The daily average weighted A(8), vibration dose value VDV(8), and vector sum A(8) and VDV(8) exposures were analyzed and compared across the solid waste collecting trucks. Study result showed that the majority of A(8) and all of the VDV(8) predominant axis exposures were above International Organization for Standardization (ISO) daily vibration action limit (A(8) = 0.5 m/s2, VDV(8) = 9.1 m/s1.75). Based on the predominant axis and vector sum exposures, most of the trucks reached the daily vibration action limits before 8-hours. When compared to the predominant axis A(8) exposures, the predominant axis VDV(8) exposures reduced the acceptable solid waste collecting truck operating times on average by over 4 hours. Our study results demonstrated that these solid waste collecting truck operators were exposed to high levels of both continuous and impulsive WBV exposures, with the impulsive WBV exposures indicating that they may pose a greater risk to the driver’s health.