Prediction of Car Following Behavior Based on the Instantaneous Reaction Time using an ANFIS-CART Based Model

Document Type: Research Paper


1 MSc. Student in GIS Division, School of Surveying and Geospatial Eng., College of Engineering, University of Tehran, Tehran, Iran

2 Assistant Professor, Center of Excellence in Geomatics Engineering in Disaster Management, School of Surveying and Geospatial Engineering., College of Engineering, University of Tehran, Tehran, Iran

3 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 studied
by transportation experts to evaluate new applications of intelligent transportation systems. Until now, several carfollowing
models have been proposed. An obvious disadvantage of the former models is the great number of parameters
which are difficult to calibrate. In this paper, a car-following model was modeled and developed by combining an
Adaptive Neuro-Fuzzy Inference System (ANFIS) and a Classification And Regression Tree (CART) to simulate and
predict future behavior of each driver-vehicle-unit (DVU). In this model, the reaction time was instantaneously calculated
based on the time interval between acceleration and relative velocity by the proposed model and was considered
as a new input. The results were compared with the fixed reaction time and the reaction time proposed by Ozaki. To
evaluate the performance of the model, we compared the proposed model's output data with real conditions and it was
found 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 real
situation of car-following.


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