FATIGUE RISK AMONG FREIGHT TRAIN DRIVER AND THE DESIGN OF MITIGATION STRATEGIES
Fatigue is one of the risk factors for railway accidents. Studies on fatigue during train operation in Indonesia are still very limited, especially in the operation of freight trains. Freight trains are the backbone of the Indonesian railway system due to their substantial revenue. However, under...
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| Format: | Dissertations |
| Language: | Indonesia |
| Online Access: | https://digilib.itb.ac.id/gdl/view/84284 |
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| Institution: | Institut Teknologi Bandung |
| Language: | Indonesia |
| Summary: | Fatigue is one of the risk factors for railway accidents. Studies on fatigue during
train operation in Indonesia are still very limited, especially in the operation of
freight trains. Freight trains are the backbone of the Indonesian railway system due
to their substantial revenue. However, understanding of the job characteristics and
the factors related to fatigue is still lacking. A good understanding of the freight
train operation system and the factors that influence it can help design effective
mitigation strategies. Therefore, this study aims to identify the risk factors that
cause fatigue and how to mitigate them.
The objectives of this research will be achieved through three studies: a preliminary
study, a field study, and a laboratory experiment. The findings from these three
studies will be used to design mitigation strategies. The preliminary study aims to
understand the operational characteristics of freight train operations and the
factors related to fatigue. Activities include distributing questionnaires, document
reviews, and field observations. The results of these activities will be used for the
second and third studies. Several findings overlap with the findings from other
activities, such as long working hours, suboptimal rest duration, and the comfort
and safety of Griya Karya. Additionally, this study also found the phenomenon of
split sleep caused by job irregularities. The impact of this split sleep will be
examined in the third study.
The second study aims to understand the fatigue profile of train engineers during
freight train operations, the level of fatigue during freight train operations, and the
correlation between fatigue indicators during field measurements. Measurements
include ocular indicators (video camera) and fatigue questionnaires (KSS and
VAS). The research results show that the fatigue pattern during freight train
operations is linear and cubic. Work shifts, train operation time, and train type are
significantly related to fatigue. Furthermore, several ocular parameters were found
to correlate strongly with subjective indicators, namely blink duration (BD), closed
phase (CDP), microsleep per minute (MPM), and PERCLOS.
The laboratory experiment in the third study aims to understand how the split-sleep
phenomenon affects fatigue. This study is based on the finding that train engineers
use the waiting time for departure at Griya Karya to sleep (findings in service flow
and sub-theme 1.3 interviews). This activity needs further investigation to
determine its impact on fatigue levels. Measurements include ocular indicators,
brain waves, performance, and KSS and VAS questionnaires. The research results
show that train operation is complex and irregular. In the laboratory experiment,
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it was found that split sleep and time significantly affect fatigue. Additionally, the
correlation test results indicate the need for further studies on SAT.
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