The study presented in this paper is aimed at analyzing the drivers’ speed profiles for the evaluation of speed differentials\udparameters (85MSR, V85 and 85V) during day and night driving. Speed differential parameters are commonly used for design\udconsistency evaluation, according to an advanced approach of road engineering, based on the study of the roadway’s\udconformance to driver expectancy that can improve road safety performance. The research was carried out using a driving\udsimulator where a section of 10 km of an existing two-lane rural road composed by 39 tangent-curve configurations was\udimplemented. The speed profiles of 40 drivers were recorded both in simulated daylight and nightlight driving conditions. The\udstudy proposes new relationships between speed differential parameters for different visibility condition and geometries of\udtangent-curve configurations and increases the actual knowledge of driver’s speed choices and driving behaviour under nighttime\udconditions. Specifically, results demonstrate different relations between speed differential parameters among four different\udclasses of tangent-curve geometries and under day and night driving conditions. Relations are also compared with the main\udliterature models that correlated speed differential parameters.
展开▼
