Using Retroreflective Material to Enhance the Conspicuity of Coal Miners

Abstract

This study investigated the use of retroreflective material to increase conspicuity of miners. A scaled simulation was created using dolls configured as miners. Twelve observers viewed four configurations of retroreflective material on dolls in three body postures at one of three locations in the visual field. In a subsequent experiment, nine observers compared two configurations. The results confirmed the poor conspicuity of the configuration currently required in mines, which features retroreflective tape on the helmet only. All experimental retroreflective configurations significantly improved detectability over this configuration. Overall, the most cost-effective configurations were those in which the belt and/or armbands were covered with retroreflective material.

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References

Austen, R. L. , Klassen, D. J. , and Vanstrum, R. C. Pedestrian conspicuity under the standard headlight system related to driver perception. Minneapolis, MN:3M Company, 1973.

Blackwell, H. R. , and Taylor, J. H. Survey of laboratory studies of visual detection. Paper presented at the NATO Seminar on Detection, Recognition, and Identification of Line-of-Sight Targets, The Hague, Netherlands, August 25-29, 1969.

Halldane, J. F. Guidelines for mine lighting, Washington, DC: U.S. Bureau of Mines, Department of the Interior, Report No. NR CA-M-70-001, October, 1970.

Hazlett, R. D. , and Allen, M. J. The ability to see a pedestrian at night: The effects of clothing, reflectorization, and driver intoxication. American Journal of Optometry and Archives of American Academy of Optometry, 1968, 45, 246-257.

HoLmes, F. Functional clothing for coal miners. Middleton, OH: Armco, Inc., Final report for the 1976 Armco Student Design Program, August, 1977.

Johansson, G. , and Rumar, K. Visible distances and safe approach speeds for night driving. Ergonomics, 1968, 11, 275-282.

Kress, G. Area-luminance effects and the visual-evoked brain response. Perception and Psychophysics, 1975, 17, 37-42.

Michon, J.A. , Eernst, J.T. , and Koustaal, G.A. Safety clothing for human traffic obstacles. Ergonomics, 1969, 12, 61-70.

Mining Safety and Health Administration . Mine Injuries and Worktime Quarterly. Washington, DC: U.S. Dept. of Labor, Directorate of Technical Support, Division of Mining Information Systems, 1978.

10.

Teichner, W. H. , and Krebs, M. J. Estimating the detectability of target luminances. Human Factors, 1972, 14, 511-519.