Driver’s reaction time in a complex road situation (braking with driving around an obstacle)
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Kielce University of Technology
Publication date: 2014-12-28
The Archives of Automotive Engineering – Archiwum Motoryzacji 2014;66(4):69–82
The way how vehicle drivers react to the road situations where the manoeuvres of braking and driving around an obstacle can be simultaneously carried out has been analysed. Three scenarios of simulated accident situations have been shown for which experiments were carried out on a motor vehicle testing track. Two scenarios were each played out with 100 drivers taking part in the tests and 30 drivers were subjected to tests according to the third scenario. For each of the scenarios, the drivers performed many tests characterized by different time-to-collision (TTC) values. The percentage distribution of specific drivers’ decisions about choosing a defensive manoeuvre (one or more) has been shown. For the action that was taken most often, where both the defensive manoeuvres, i.e. braking and driving around, were combined, the sequence of steps most frequently followed to avoid a collision has been presented. The driver’s reaction time values measured at braking and turning (to drive around an obstacle) have been given for the road situations under consideration. Both the average values obtained from the experiments and the quantiles shown in the graphs depend on the type of road situation and on the degree of risk, a measure of which is the TTC value.
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