A Descriptive Analysis of Factors Contributing to Bus Drivers’ Performances While Driving: A Case Study in Malaysia

Ismail, Ahmad Rasdan; Abdullah, Siti Nur Atikah; Abdullah, Abdul Adam; Deros, Baba Md

doi:10.15282/ijame.11.2015.23.0204

Cited by 11 publications

(14 citation statements)

References 16 publications

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“…Drivers may feel uncomfortable from the exposure to a low frequency of vibrations transmitted to the body from the seat. Road condition such as rough track and speed of vehicles may increase the level of exposure to whole-body vibration [1,2]. Therefore, the isolation system is important for drivers to protect the body from excessive exposure to vibration, especially on the off-road condition.…”

Section: Introductionmentioning

confidence: 99%

Mathematical Model of Suspension Seat-Person Exposed to Vertical Vibration for Off-Road Vehicles

Adam

Jalil

Razali

et al. 2019

IJAME

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Off-road drivers are exposed to a high magnitude of vibration at low frequency (0.5-25Hz), that can cause harm and possibly attribute to musculoskeletal disorder, particularly low-back pain. The suspension seat is commonly used on an off-road condition to isolate the vibration transmitted to the human body. Nevertheless, the suspension seat modelling that incorporates the human body is still scarce. The objective of this study is to develop a mathematical modelling to represent the suspension seat-person for off-road vehicles. This paper presents a three degrees-of-freedom lumped parameter model. A curve-fitting method is used for parameter identification, which includes the constraint variable function (fmincon()) from the optimisation toolbox of MATLAB(R2017a). The model parameters are optimised using experimentally measured of suspension seat transmissibility. It was found that the model provides a reasonable fit to the measured suspension seat transmissibility at the first peak of resonance frequency, around 2-3 Hz. The results of the study suggested that the human body forms a coupled system with the suspension seat and thus affects the overall performance of the suspension system. As a conclusion, the influence of the human body should not be ignored in the modelling, and a three-degrees degree-of-freedom lumped parameter model provides a better prediction of suspension seat transmissibility. This proposed model is recommended to predict vibration transmissibility for off-road suspension seat.

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Section: Introductionmentioning

confidence: 99%

Mathematical Model of Suspension Seat-Person Exposed to Vertical Vibration for Off-Road Vehicles

Adam

Jalil

Razali

et al. 2019

IJAME

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“…Overall, according to the tendency line (line in black) in Figure 2's graph, there has been a growing tendency in the number of publications over the years. This biased growth was driven after the year 2007 due to the increase in the number of publications per year, which increased from one to two articles on average and especially the years 2015 [19,31,50,51] and 2020 [9,11,13,48] stand out with four publications each. Therefore, it is noticeable that researchers in this knowledge area have been directing more attention to this environment, and that the significance of conducting thermal analyses in bus cabins has been growing.…”

Section: Bibliometric Resultsmentioning

confidence: 99%

A Review of Thermal Comfort Applied in Bus Cabin Environments

2020

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As of 2020, it has been 50 years since the publication of Fanger’s predictive model of thermal comfort that was designed for indoor environments and attention worldwide is directed at the COVID-19 pandemic and discussions around recommendations for these indoor environments. In this context, many environments and their occupants will suffer consequences related to thermal comfort due to the necessary indoor air changes. In bus cabins, the impact might be even greater, seeing that they are responsible for the mass transportation of people. Thus, this paper intends to review the studies on thermal comfort that analyzed bus cabin environments. It adapts the PRISMA methodology and, as a result, it includes 22 research papers published in journals. Among those, 73% focused on approaching the occupants’ thermal sensation, followed by fuel/energy economy (18%), and driver productivity (9%). The current state-of-the-art indicates that air temperature and air velocity were the parameters most employed by the included studies, but eight papers analyzed all six parameters of the standard models of thermal comfort. The most employed model of thermal comfort was Fanger’s, but there has not been an investigation that assesses its consistency in predicting the occupants’ thermal sensation in the explored environment. Nevertheless, the analyzed studies recommended constant air change inside closed buses or keeping them open to minimize adverse effects on the occupants’ health, especially due to airborne diseases and CO2 concentration possibly being a suitable indicator to identify the need for air change.

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“…Further studies involving other factors should be undertaken to increase the resources in their support. It is also hoped that this finding will help to increase awareness among bus drivers so that their performance is improved, thus leading to fewer accidents [20].…”

Section: The Parameters Which Encourage City Bus Collisions With Pedementioning

confidence: 93%

“…However, the accident situation in Japan obviously reveals the basic patterns as well as mechanisms of pedestrian and vehicle collisions [3]. For other factors of road accidents, the scenario is one of the contributory factors of road accidents, for example, bad weather route conditions as well as vehicle and driving problems [7,8]. Driving at night reduces the visibility distance by 30 -60 %, while average normal driving visibility distance is 300 meters.…”

Section: Introductionmentioning

confidence: 99%

Investigation of accident scenarios between pedestrians and city buses in Thailand

Lakkam¹,

Koetniyom²

2015

Int. J. Automot. Mech. Eng.

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An accident between pedestrians and city buses is one cause of severe casualties in Thailand. To discover the causes of the city bus collisions with pedestrians, 22 accident cases which occurred in Bangkok and suburban areas from January 2012 to July 2013 were reconstructed and investigated. In this study, the impact speeds were estimated by data correction at the incident scene using the kinematic measurement device. Besides, these collision cases were categorized by the difference between low-and high-located windshield types with regards to the behavior and body region of pedestrian injuries. Moreover, it was discovered that pedestrian injuries were more severe at impact speeds of approximately at 20 to 50 km/h. However, the 90th percentile impact speed was not over 30 km/h. Moreover, there were 7 cases among 21 collisions (33%) in the early afternoon time (12.01am-3.29pm) of driving period, which was almost the end of the morning shift. That was probably the result of long durations of driving, a condition which is a significant cause of fatigue-related accidents.

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A Descriptive Analysis of Factors Contributing to Bus Drivers’ Performances While Driving: A Case Study in Malaysia

Cited by 11 publications

References 16 publications

Mathematical Model of Suspension Seat-Person Exposed to Vertical Vibration for Off-Road Vehicles

Mathematical Model of Suspension Seat-Person Exposed to Vertical Vibration for Off-Road Vehicles

A Review of Thermal Comfort Applied in Bus Cabin Environments

Investigation of accident scenarios between pedestrians and city buses in Thailand

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