A comprehension-based ergonomic redesign of Philippine road warning signs

A Preliminary Study of the Measurement of Road

“…Two of them are very close to 67.0% standard (Sign no.3 and 19 with comprehension score 66.0%) Considering that 22 out of 37 road warning signs have comprehension score below 67.0%, it is clear that road warning signs in Jakarta are not easily understood by drivers. It is not surprising since similar findings were also found in prior studies (Banares et al, 2018;Choocharukula and Sriroongvikrai, 2017;Yuan et al, 2014;Sodikin et al, 2013;Kirmizioglu and Hasan, 2009;Al-Madani and Al-Janahi, 2002). A low comprehension level, as results of this study, signified that road warning signs in Jakarta are not sufficiently reliable as designed.…”

“…The responses from warning signs test accomplished by 100 respondents were aggregated and presented in Table 2. To calculate the comprehension score, Equation (1) was used in which only the correct number of each sign is considered (Banares et at., 2018;Ben-Bassat and Shinar, 2015). For example the sign number 1, 53 out of 100 participants answered correctly; this corresponds to 53% comprehension score.…”

“…For each question about warning sign, the participants were asked to answer one out of four options. The responses are coded according to the previous studies (Ben-Bassat and Shinar, 2006;Banares et al, 2018) which are (1) correct and complete, (2) partially correct, (3) incorrect, and (4) the opposite of true sign meaning. Once the questionnaire filled out by drivers, the comprehension score for each warning sign was computed.…”

“…Recent study by Choocharukula and Sriroongvikrai (2017) among international road users found the comprehension level of 56.00% on the road signs. Similarly, Banares et al (2018) found that participants did not pass 21 out of 40 Philippines road signs for the standard comprehension level.…”

“…Correct understanding is a major factor in determining the effectiveness of road warning signs (Banares et al, 2018). Lack of understanding for warning sign could lead to decision errors while driving.…”