Please use this identifier to cite or link to this item: http://hdl.handle.net/10077/8696
Title: Validation Procedure for Predictive Functions of Driver Behaviour on Two-Lane Rural Roads
Authors: Dell’Acqua, Gianluca
Russo, Francesca
Mauro, Raffaele
Keywords: driver speed behaviordifferent land contextsresults validation
Issue Date: 2013
Publisher: EUT Edizioni Università di Trieste
Source: Dell’Acqua, G., Russo, F., Mauro, R. (2013) Validation procedure for predictive functions of driver behaviour on two-lane rural roads, European Transport \ Trasporti Europei, 53, paper 10
Series/Report no.: European Transport \ Trasporti Europei
53
Abstract: The study presented here aims to validate some operating speed prediction models calibrated on two-lane rural roads by using speed data collected in Northern and Southern Italy. Operating speed is defined as the speed at which drivers of passenger cars travel on a dry road in free flow conditions during daylight hours and it is calculated using a specific percentile of speed distribution, typically the 85th. Speed measurements were carried out by using laser detectors in connection with previous environmental and traffic conditions. The study is addressed to emphasize the reliability and easy application of one predictive speed model working both on tangent segments and on circular curves. The calibration phase involved roads in the Northern Italy, while the validation phase involved roads in the Southern Italy. Three models were validated applying them on eight two-lane rural roads falling within the road network of the Province of Salerno with features that reflect those adopted in the calibration phase; the selected models to be validated present the simplest analytical structure for type and number of explanatory variables and for the performance diagram shape of the operating speed values. The validation procedure was to estimate some synthetic statistical parameters as mean absolute deviation, mean squared error and coefficient of variation. The results allow in a simple way to trace continuous operating speed profiles on two-lane rural roads and to carry out safety analyses on the horizontal alignment.
URI: http://hdl.handle.net/10077/8696
ISSN: 1825-3997
Appears in Collections:European Transport / Trasporti Europei (2013) 53

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