The values on parameters describing longitudinal driving behavior in car-following models differ ... more The values on parameters describing longitudinal driving behavior in car-following models differ substantially between drivers. Different individual interactions with the environment are assumed to play an important role, which might be explained through mental workload. Therefore a driving simulator experiment with a repeated measures design was performed to investigate to what extent perception of an incident in the other driving lane influences physiological indicators as well as subjective estimates of mental workload and longitudinal driving behavior. As almost none of the current models of car-following behavior incorporate mental workload as a determinant of driving behavior, an investigation was conducted by using a calibration approach for joint estimation to determine whether these models, represented by the intelligent driver model and the Helly model, adequately described longitudinal driving behavior in case of incidents in the other driving lane. The results indicated that perception of an incident in the other driving lane influenced mental workload as measured by physiological indicators and longitudinal driving behavior. In addition, the results indicated that current car-following models did not adequately describe driving behavior in case of incidents in the other driving lane.
To have knowledge about the acceptability of Intelligent Transport systems (ITS) is most benefici... more To have knowledge about the acceptability of Intelligent Transport systems (ITS) is most beneficial for the development of supported implementation strategies. So far, different theories and methods, also stemming from other domains, have been used to define and conceptualize the notion of acceptability. Previously we developed a theoretical concept to define acceptability of ISA based on different theories and methods used in ITS & ISA research. In the current paper we aim to find out which predefined indicators are relevant to define the acceptability of ISA. Background factors, contextual issues and ISA-device related factors are used as indicators to predict the level of acceptability. Structural Equation Modelling (SEM) is used to define the direct and indirect effects.
European Journal of Transport and Infrastructure Research
Relative and absolute validity of a driving simulator were assessed regarding effects on mean spe... more Relative and absolute validity of a driving simulator were assessed regarding effects on mean speed and speed variation during distracting secondary tasks, and normal driving. 16 participants drove the same route four times, twice in a simulator and twice in the real world. They performed way finding tasks, using either a paper map or a route guidance system, and mobile phone conversation tasks. Furthermore, driving without secondary tasks on other road segments in the two methods was compared. As both mean speed and standard deviations of speed were not equivalent, absolute validity could not be established. However, as effects found in the experimental conditions varied in the same directions, evidence for relative validity was provided. It is concluded that driving performance regarding speed under distracting conditions may validly be researched in the driving simulator employed here.
To monitor novice driver performance in the first years of solo driving, a test aimed at assessin... more To monitor novice driver performance in the first years of solo driving, a test aimed at assessing speed adaptation to the traffic situation was developed and evaluated. The Adaptation Test consisted of 18 traffic scenes presented in two (almost) identical photographs, which differed in one single detail, increasing the situation's complexity. As the pictures were presented randomly and participants could
Observations of overtaking manoeuvres on two-lane rural roads were carried out to enhance the und... more Observations of overtaking manoeuvres on two-lane rural roads were carried out to enhance the understanding of driver behaviour prior to, during and after an overtaking manoeuvre. An instrumented vehicle was driven with different speeds while other vehicles' overtaking manoeuvres were recorded and analysed afterwards. The differences in duration of overtaking manoeuvres between different overtaking strategies and different speeds of the vehicle that was overtaken, turned out to be small. Fairly short perception-reaction times were observed, indicating that the decision to perform an overtaking manoeuvre is made before an appropriate gap in the oncoming traffic stream is available.
The values on parameters describing longitudinal driving behavior in car-following models differ ... more The values on parameters describing longitudinal driving behavior in car-following models differ substantially between drivers. Different individual interactions with the environment are assumed to play an important role, which might be explained through mental workload. Therefore a driving simulator experiment with a repeated measures design was performed to investigate to what extent perception of an incident in the other driving lane influences physiological indicators as well as subjective estimates of mental workload and longitudinal driving behavior. As almost none of the current models of car-following behavior incorporate mental workload as a determinant of driving behavior, an investigation was conducted by using a calibration approach for joint estimation to determine whether these models, represented by the intelligent driver model and the Helly model, adequately described longitudinal driving behavior in case of incidents in the other driving lane. The results indicated that perception of an incident in the other driving lane influenced mental workload as measured by physiological indicators and longitudinal driving behavior. In addition, the results indicated that current car-following models did not adequately describe driving behavior in case of incidents in the other driving lane.
To have knowledge about the acceptability of Intelligent Transport systems (ITS) is most benefici... more To have knowledge about the acceptability of Intelligent Transport systems (ITS) is most beneficial for the development of supported implementation strategies. So far, different theories and methods, also stemming from other domains, have been used to define and conceptualize the notion of acceptability. Previously we developed a theoretical concept to define acceptability of ISA based on different theories and methods used in ITS & ISA research. In the current paper we aim to find out which predefined indicators are relevant to define the acceptability of ISA. Background factors, contextual issues and ISA-device related factors are used as indicators to predict the level of acceptability. Structural Equation Modelling (SEM) is used to define the direct and indirect effects.
European Journal of Transport and Infrastructure Research
Relative and absolute validity of a driving simulator were assessed regarding effects on mean spe... more Relative and absolute validity of a driving simulator were assessed regarding effects on mean speed and speed variation during distracting secondary tasks, and normal driving. 16 participants drove the same route four times, twice in a simulator and twice in the real world. They performed way finding tasks, using either a paper map or a route guidance system, and mobile phone conversation tasks. Furthermore, driving without secondary tasks on other road segments in the two methods was compared. As both mean speed and standard deviations of speed were not equivalent, absolute validity could not be established. However, as effects found in the experimental conditions varied in the same directions, evidence for relative validity was provided. It is concluded that driving performance regarding speed under distracting conditions may validly be researched in the driving simulator employed here.
To monitor novice driver performance in the first years of solo driving, a test aimed at assessin... more To monitor novice driver performance in the first years of solo driving, a test aimed at assessing speed adaptation to the traffic situation was developed and evaluated. The Adaptation Test consisted of 18 traffic scenes presented in two (almost) identical photographs, which differed in one single detail, increasing the situation's complexity. As the pictures were presented randomly and participants could
Observations of overtaking manoeuvres on two-lane rural roads were carried out to enhance the und... more Observations of overtaking manoeuvres on two-lane rural roads were carried out to enhance the understanding of driver behaviour prior to, during and after an overtaking manoeuvre. An instrumented vehicle was driven with different speeds while other vehicles' overtaking manoeuvres were recorded and analysed afterwards. The differences in duration of overtaking manoeuvres between different overtaking strategies and different speeds of the vehicle that was overtaken, turned out to be small. Fairly short perception-reaction times were observed, indicating that the decision to perform an overtaking manoeuvre is made before an appropriate gap in the oncoming traffic stream is available.
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