We investigated the impact of deregulating the presence of stop signs at railway crossings on car driver behavior.We estimated the\nprobability that a driver would stop inside the crossing, thereby obstructing the tracks, when a lead vehicle suddenly stopped after\nthe crossing and a stop regulation was eliminated.We proposed a new assessment method of the driving behavior as follows: first,\ncollecting driving behavior data in a driving simulator and in a real road environment; then, predicting the probability based on\nthe collected data. In the simulator experiment, we measured the distances between a lead vehicle and the driver�s vehicle and the\ndriver�s response time to the deceleration of the leading vehicle when entering the railway crossing.We investigated the influence of\nthe presence of two leading vehicles on the driver�s vehiclemovements.Thedeceleration datawere recorded in the field experiments.\nSlower driving speed led to a higher probability of stopping inside the railway crossing. The probability was higher when the vehicle\nin front of the leading vehicle did not slow down than when both the lead vehicle and the vehicle in front of it slowed down. Finally,\nadvantages of our new assessment method were discussed.
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