G7-3　Visual Recognition Assessment of Road Barriers in Metro Manila

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<p>According to an article in Manila Standard, 2.5 million vehicles are registered in the Philippines as of the year 2015. A total of 94 reports of barrier-related accidents were recorded in 2011, ranking second in object collision incidents in Metro Manila. According to the Metro Manila Accident Report and Analysis System by the MMDA, barrier-related collisions make up 30.62% of the total recorded accidents with declared category. Furthermore, poor visibility of road barriers is one of the commonly cited causes for these incidents. With the increasing number of registered vehicles, the study aims to assess the visual acuity of existing traffic barriers in Metro Manila's major roads, particularly in Epifanio de los Santos Avenue (EDSA) and to provide recommendations that will help improve visibility and recognition of traffic barriers under various road environments which can reduce traffic barrier-related accidents. The assessment was conducted through a simulation of a light traffic condition in EDSA with the combination of three factors (time of day, weather condition, and type of barrier). Three common barriers, currently installed in the past few years, were tested. These are the 1) Orange Water-Filled Plastic Jersey Barriers, 2) white-and-black-striped Concrete Jersey Barrier and 3) yellow small-block concrete delineator. Participants were asked to detect the presence of the traffic barrier while counting the number of vehicles in the simulated video. A total of fifteen male and female participants, ranging from 17 to 24 years old, were asked to participate in the study, none of which have poor eye conditions. Analysis of results, using ANOVA, showed that only the barrier type has a significant effect on the visual recognition time (F=8.07, P=0.007). Result shows that recognition time of the participants are significantly different between the types of barrier present in the simulation. Tukey's Studentized Range Test revealed that recognition times for Orange Jersey Barrier (X-bar=12.31, Sd=7.64) were significantly faster compared to the other two barriers. Thus, it is recommended that the Orange Jersey Barrier be the standard road barrier in Metro Manila.</p>

収録刊行物

  • 人間工学

    人間工学 53 (Supplement2), S628-S631, 2017

    一般社団法人 日本人間工学会

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