Nowadays the study of road intersections, in particular roundabouts, through microscopic simulation software has become more and more popular, but it is important to underline that, despite the great diffusion of these instruments, there has not been the same improvement of appropriate methods in order to validate and calibrate these models. Therefore, the problem of the reliability of functional design of a road junction, by the use of the results obtained by microsimulation software, highlights the need to know which and how many input parameters are most significant for the variation of output results that each microscopic simulation software is able to provide. Beginning from the acquisition of some principal vehicular parameters of a roundabout placed in a city in province of Cosenza (ITALY), the Authors present a first comparative approach between observed performances and performances obtained by the use of VISSIM software: 216 scenarios for single-lane roundabouts has been composed and analyzed in order to evaluate the effect of kinematic and behavioral parameters in the simulation of roundabouts by analysis of variance. This calibration procedure has allowed to delineate some important conclusions about the choice of Vissim inputs.
CALIBRATION OF TRAFFIC MICROSCOPIC SIMULATION MODELS: KINEMATICAL APPROACH TO THE THROUGH MOVEMENT ON ROUNDABOUTS
VAIANA, Rosolino;
2011-01-01
Abstract
Nowadays the study of road intersections, in particular roundabouts, through microscopic simulation software has become more and more popular, but it is important to underline that, despite the great diffusion of these instruments, there has not been the same improvement of appropriate methods in order to validate and calibrate these models. Therefore, the problem of the reliability of functional design of a road junction, by the use of the results obtained by microsimulation software, highlights the need to know which and how many input parameters are most significant for the variation of output results that each microscopic simulation software is able to provide. Beginning from the acquisition of some principal vehicular parameters of a roundabout placed in a city in province of Cosenza (ITALY), the Authors present a first comparative approach between observed performances and performances obtained by the use of VISSIM software: 216 scenarios for single-lane roundabouts has been composed and analyzed in order to evaluate the effect of kinematic and behavioral parameters in the simulation of roundabouts by analysis of variance. This calibration procedure has allowed to delineate some important conclusions about the choice of Vissim inputs.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
