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IV—Visual Range and the Degree of Risk

Published online by Cambridge University Press:  18 January 2010

Yahei Fujii  and
Hiroyuki Yamanouchi
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Extract

The visual sense supplies a major part of the information necessary for avoiding traffic accidents and fog impedes this channel of information, even though the invention of radar has removed the limitation to a considerable extent. The closure of airports is caused mainly by reduced visual range and partly by low cloud, or by typhoons in Japan. The length of signal sections on the Japan National Railway (600 m) was determined from a study of the frequency of visual ranges. Nishikura and others have studied the influence of visibility on the probability of marine traffic accidents and conclude that the ratio of the collision danger with a visibility less than 1 km and more than 1 km is in the range of from 30 to 100. Wheatley et al. have also shown the risk of traffic accidents to be high in bad visibility in the Dover Strait.

Type
Some Factors Affecting the Frequency of Accidents in Marine Traffic
Information
The Journal of Navigation , Volume 27 , Issue 2 , April 1974 , pp. 248 - 252
Copyright
Copyright © The Royal Institute of Navigation 1974

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References

REFERENCES

(1971). Statistics of Maritime Casualties, Navigation Safety Section, Maritime Safety Agency.Google Scholar
Wheatley, J. H. W. (1973). Traffic in English Channel and Dover Strait. II—Circumstances of collisions and strandings. This Journal, 26, 92.Google Scholar
Yamaguchi, A. and Sakaka, S. (1971). Traffic surveys in Japan. This Journal, 24, 527.Google Scholar
Kandori, A. (1972). The collision in Kanmon Strait, J. Nautical Soc. Japan, 47, 79.Google Scholar