The influence of heavy truck egress tactics on ground reaction force.
Reed-MP; Hoffman-SG; Ebert-Hamilton-SM
Research and Practice for Fall Injury Control in the Workplace: Proceedings of International Conference on Fall Prevention and Protection. Morgantown, WV: U.S. Department of Health and Human Services, Public Health Service, Centers for Disease Control and Prevention, National Institute for Occupational Safety and Health, DHHS (NIOSH) Publication No. 2012-103, 2011 Nov; :192-195
The lower ground reaction forces observed with inward-facing egress provide a biomechanical justification for recommending that tactic, since lower ground reaction forces are associated with reduced tissue stresses. In undirected trials, drivers with higher BMI were more likely to chose the lower-stress tactic, providing some evidence of risk compensation. Surprisingly, step and hand hold configuration did not affect either tactic selection or ground reaction force. A more detailed analysis is needed, but one possibility is that driver tactic preference based on years of experience tends to override any effects of shortduration exposure to a new step and hand hold configuration. The data show large inter-subject variability, however, and tactic changes may have occurred within the broad categories used here. These data are limited by the laboratory setting and test equipment. Some drivers moved more slowly than is typical for drivers in their own trucks, which likely makes the current conclusions conservative - higher-speed egress would lead to higher PVGRF and an increased risk for outward-facing egress. The postures at the time of ground contact also differ substantially between tactics and may lead to different stress even with the same ground reaction force.
Accident-potential; Accident-prevention; Accidents; Accident-statistics; Biomechanical-modeling; Biomechanics; Driving; Ergonomics; Fall-protection; Injuries; Injury-prevention; Laboratory-techniques; Laboratory-testing; Posture; Risk-analysis; Risk-factors; Safety-equipment; Safety-measures; Safety-research; Standards; Statistical-analysis; Weight-factors
University of Michigan Transportation Research Institute, 2901 Baxter Road, Ann Arbor, Michigan, 48109, USA
Research and Practice for Fall Injury Control in the Workplace: Proceedings of International Conference on Fall Prevention and Protection
University of Michigan at Ann Arbor