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An on-road assessment of cognitive demand : Drivers' Gaze Dispersion on Highway Driving
Myoungouk Park,Taeyoung Lee,Joonwoo Son 대한인간공학회 2012 대한인간공학회 학술대회논문집 Vol.2012 No.5
Objective: This paper aims to understand the driving performance degradation and gaze dispersion changes under auditory cognitive workload conditions which consists of three different levels of cognitive complexity. Background: As the use of in-vehicle technologies became more popular, there is concern about a concomitant increase in driver distraction arising from their use. While the introduction of voice recognition systems is intended to reduce the distraction due to manual operation of these units, a significant proportion of the distraction associated with their use may arise not from the manual manipulation but rather the cognitive consequences. It is also known that the risk of inattentive driving varies with age. Method: In this study, 15 younger drivers (aged 25-35) engaged in three levels of a delayed auditory recall task, so called N-back task, while driving on a highway. Results: It was observed that gaze dispersion decreased with each level of demand, demonstrating that these indices can correctly rank order cognitive workload. Conclusion: Effects were also observed on driving performance measures including average speed and standard deviation of lane position, but they were subtle, nonlinear, and did not effectively differentiate. Application: The results of the publishing trend analysis might help to assess automotive human machine interface (HMI) design.
Evaluating the effectiveness of advanced driver assistance systems from a field study
Myoungouk Park,Joonwoo Son 대한인간공학회 2013 대한인간공학회 학술대회논문집 Vol.2013 No.10
Objective: This paper aims to investigate age differences in the effectiveness of advanced warning systems. Background: Understanding of age differences in the effectiveness towards advanced driver assistance systems may help successful introduction of new technology in auto-market. Method: 52 drivers were participated in on-road field experiments. They drove approximately 6.2km on urban road (about 25 minutes) and 9.6km of highway (about 10 minutes) either with or without ADAS (Advanced Driver Assistance Systems) support. After completing the driving experiment, comparisons between the ADAS-supported and non-supported groups were conducted. Results: The results suggested that the FCW (Forward Collision Warning) and the LDW (Lane Departure Warning) significantly impact on average velocity and headway on highway driving, and steering reversal rate on urban driving, respectively. Conclusion: The ADAS are likely to make a positive influence on drivers’ behaviors by increasing their safety margins such as lower speed and longer headway distance.
Simulator-based Driving Assessment for Stroke Patients
Myoungouk Park,Joonwoo Son,Bawul Kim,Hwa-kyung Shin 대한인간공학회 2014 대한인간공학회 학술대회논문집 Vol.2014 No.5
Driving increases independence and leads to decline in driving ability, which is associated with reduced quality of life. To ensure the stroke drivers’ safety, their drive ability needs to be examined and the most accurate way to determine a fitness to drive is the on-road driving assessment. However, because of safety issues, risks, and access constraints, on-road driving assessments may not be always the best and driving simulators could be a potential alternatives. To use a driving simulator as a test tool, the normative performance of healthy adults and the difference of the stroke patients should be investigated. The aim of this study is to compare driving performance with data obtained from healthy adults and stroke drivers in a driving simulator. Consecutive survivors after stroke (n=21) who were not severely impaired and performed the driving assessment. The driving scenario consists of urban traffic conditions, straight highway, and curved or hilly rural roads. Performance measurements during the simulated driving were automatically generated by the simulator software. The performance measures running time, reaction time, time-to-collision, number of road edge excursions, steering wheel reversal rate, centerline crossings, speed limit violations, and number of accidents. The results showed the stroke drivers’ performances in the most of the driving skills assessed were significantly worse than healthy drivers and varied on the three different road scenarios.
Simulator-based Driving Assessment for Stroke Patients
( Myoungouk Park ),( Joonwoo Son ),( Bawul Kim ),( Hwa Kyung Shin ) 한국감성과학회 2014 춘계학술대회 Vol.2014 No.-
Driving increases independence and leads to decline in driving ability, which is associated with reduced quality of life. To ensure the stroke drivers` safety, their drive ability needs to be examined and the most accurate way to determine a fitness to drive is the on-road driving assessment. However, because of safety issues, risks, and access constraints, on-road driving assessments may not be always the best and driving simulators could bea potential alternatives. To use a driving simulator as a test tool, the normative performance of healthy adults and the difference of the stroke patients should be investigated. The aim of this study is to compare driving performance with data obtained from healthy adults and stroke drivers in a driving simulator. Consecutive survivors after stroke (n=21) who were not severely impaired and performed the driving assessment. The driving scenario consists of urban traffic conditions, straight highway, and curved or hilly rural roads. Performance measurements during the simulated driving were automatically generated by the simulator software. The performance measures running time, reaction time, time-to-collision, number of road edge excursions, steering wheel reversal rate, centerline crossings, speed limit violations, and number of accidents. The results showed the stroke drivers`performances in the most of the driving skills assessed were significantly worse than healthy drivers and varied on the three different road scenarios.
Sungryul Park,Myoungouk Park,Joonwoo Son 대한인간공학회 2018 대한인간공학회 학술대회논문집 Vol.2018 No.5
Objective: This paper aims to propose basic take-over scenarios for evaluating human factors experimental design in take-over situation to assess take-over performance on conditional automated driving. Background: In the autonomous driving environment of SAE level 3, some studies have been conducted to ensure the safety of takeover situations. However, it is necessary to develop a basic scenario that can represent the transition situation for integrating and analyzing the results of individual studies. Method: The literature review was conducted focusing on the element, traffic complexity before the transition referring to our previous classification results. Results: The inclusion criteria for developing the scenarios were road type and event. Four types of basic take-over scenarios have been proposed in this study; straight road-missing lane marking, curved road-missing lane marking, straight road-unexpected external obstacle, and straight road-system failure. Application: The results of this study can contribute to designing an experiment to evaluate safety before control in the event of a conditional automatic (Level 3) in the future.