The incidence of traffic violations caused by public transportation demonstrates the importance of investigating
alternative forms of road safety intervention. In this paper, we report on a two-month field trial in which three HMI (human machine interface) prototypes were evaluated with 47 bus drivers in Singapore. This was done to understand how warning messages might improve junction safety for public buses. Via semi-structured interviews and video analysis, the study evaluated driver perceptions of the HMIs, as well as whether the display of different warning messages had any measurable impact on driving behaviour. Overall, the results identified stronger preferences for more context-specific information, which aided the drivers by improving the road visibility around traffic obstructions and blind spots. An interpretation of these results, in addition to recommendations for future work is provided.
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We would like to sincerely thank SBS Transit and the Land Transport Authority of Singapore for their support and
assistance in running the field trial.
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