Journal of Light & Visual Environment
Online ISSN : 1349-8398
Print ISSN : 0387-8805
ISSN-L : 0387-8805
Installation Report
Symbolized Intersection Sign “Co Co Mark”
Toshio Yoshii
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2014 Volume 38 Pages 145-148


This paper introduces a system of symbolized intersection and its effectiveness. In the system, each intersection has been named as one of alphabet, and the guide sign of an alphabet is placed at each intersection. The guide sign can be clearly distinguished by drivers and also it can be understandable from longer distance. Because of these properties, sudden deceleration or dull traveling is expected to be decreased and consequently safety/smoothness of the traffic is expected to be improved. Also, the guide signs are expected to bring more understandable route guidance. The guide signs named “Co Co Mark” are proposed and are actually used in Kochi city. The knowledge of the benefit acquired through the experiment on the actual road network is shown below.

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© 2014 The Illuminating Engineering Institute of Japan
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