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http://dx.doi.org/10.5392/JKCA.2013.13.11.944

Estimating the Effect of VMS on Drivers' Legibility and Perception  

Jeong, Jun-Hwa (한국건설기술연구원 SOC성능연구소 도로교통연구실)
Lee, Suk-Ki (한국건설기술연구원 SOC성능연구소 도로교통연구실)
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Abstract
Drivers need lots of information when they drive on the highway, however it is necessary and important to be provided information which is appropriate formation. In order to offer the suitable information, adequate size, quantity, and frequency of provided information are required for the drivers. To evaluate propriety of the expressed message of VMS that provides real-time traffic conditions, first of all, the amount of message about legibility distance and viewing should be estimated. In this research, drivers' characteristics of VMS message design were also reviewed to enhance the efficiency of VMS. And legibility distance, the amount of viewing information, and ratio of viewing information were analyzed on the currently operating VMS. The results of this study proposed that the appropriate size, quantity, and frequency were concluded by the legibility and memory of message on the real driving conditions. Consequently, these design methods of VMS could be expected to improve the transmitting capability of highway information to drivers.
Keywords
Variable Message Signs; Legibility Distance; Lost Legibility Distance; Legibility Index;
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