According to the Ministry of Transport's most recent report on road accidents, dozing off while driving is the third most frequent cause of such incidents. The data reveals that driving above the speed limit and reckless cutting off by other drivers or vehicles occupy the top two positions. The Department of Highways has acknowledged these issues and undertaken a comprehensive study to minimize the impact of drowsiness-related highway accidents. The results will be converted into guidelines and safety measures for drivers to ensure their safety on the road.

     Various tools were utilized in the study, including a brain wave scanner (EMOTIVE), a smartwatch to monitor heart rate, a motion picture camera, and questionnaires to assess drowsiness. The study was conducted in two parts. The first part consisted of a laboratory experiment utilizing a driving simulator to test different measures, such as patterns on the road and rumble strips.

The department is conducting a pilot project aimed at measuring the effectiveness of measures to combat drowsiness. As part of this initiative, it has begun installing labels that reduce sleepiness in three pilot areas:

1. Highway No. 340, Salee – Suphan Buri route, Suphan Buri Province, km 50+000 – 70+000 outbound;
2. Highway No. 1, Pratunam Phra In – Nong Khae, Saraburi Province, km 76+000 – 56+000 inbound;
3. Highway No. 344, Nong Ri – Khlong Khet, Chonburi Province, km 20+350 – 40+350 outbound.

     Based on driver surveys and test results, it has been found that using clear question-answer signs can greatly improve driver attentiveness. These signs have been shown to reduce drowsiness and increase alertness. Combining these labels with transverse rumble strips has been found to be an even more effective way to enhance driver alertness and increase brand visibility.

     To enhance the efficacy of a driver alert system utilizing distinct question-answer signs, it is imperative to incorporate a wider range of questions. Regularly altering these questions every 1-3 months can prevent monotony and sustain driver engagement. However, it is crucial to analyze the effectiveness of these measures in the context of the particular route. Other factors, such as roadside signage, parking options, and rest stops, must also be considered to ensure overall safety.

Data updated on March 21, 2023

Source:  Department of Highways

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