Mohsen Poor Arab Moghadam - MSc. Student in GIS Division, School of Surveying and Geospatial Eng., College of Engineering, University of Tehran, Tehran, Iran
Parham Pahlavani - Assistant Professor, Center of Excellence in Geomatics Engineering in Disaster Management, School of Surveying and GeospatialEngineering., College of Engineering, University of Tehran, Tehran, Iran
Saber Naseralavi - Assistant Professor, Department of Civil Engineering, Shahid Bahonar University of Kerman, Kerman, Iran

Car-following models are among the most important components of micro traffic flow simulation which is studiedby transportation experts to evaluate new applications of intelligent transportation systems. Until now, several carfollowingmodels have been proposed. An obvious disadvantage of the former models is the great number of parameterswhich are difficult to calibrate. In this paper, a car-following model was modeled and developed by combining anAdaptive Neuro-Fuzzy Inference System (ANFIS) and a Classification And Regression Tree (CART) to simulate andpredict future behavior of each driver-vehicle-unit (DVU). In this model, the reaction time was instantaneously calculatedbased on the time interval between acceleration and relative velocity by the proposed model and was consideredas a new input. The results were compared with the fixed reaction time and the reaction time proposed by Ozaki. Toevaluate the performance of the model, we compared the proposed model s output data with real conditions and it wasfound that the precision of the proposed model was significantly high with regard to the instantaneous reaction time.According the implemented simulation, the proposed model reached a good validity on the basis of proximity to a realsituation of car-following.

Traffic engineering, Car following modeling, reaction time, microscopic simulation, intelligent transportationsystem (its)