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 th...

In this paper, we present a car tracking system which provides quantitative and qualitative motion estimates of the tracked car simultaneously from a moving observer. First, we construct three motion models (constant velocity, constant acceleration, and turning) to describe the qualitative motion of a moving car. Then the models are incorporated into the Extended Kalman Filters to perform quant...

Purpose. The work is aimed to investigate the loading of load-bearing structure with composite material roof. This will allow reducing dead weight hopper car and contribute possibility increasing its carrying capacity. Methodology. Investigations were performed using example hoper for grain transporting, model 19-6869, manufactured by Karpaty Experimental Mechanical Plant. It important say that...

in this study, a numerical computational fluid dynamics study is conducted in order to predict the aerodynamic forces on the np car. the turbulent air flow around the car is modeled using the realizable k-ε model. first, results are validated against those presented for the ahmed’s body. next, the fluid flow around the car is simulated for different car speeds ( to mph) and flow directions ( to...

In this study, a numerical computational fluid dynamics study is conducted in order to predict the aerodynamic forces on the NP car. The turbulent air flow around the car is modeled using the realizable k-ε model. First, results are validated against those presented for the Ahmed’s body. Next, the fluid flow around the car is simulated for different car speeds ( to mph) and fl...

A rather simple car driving simulator was created based on the available open source engine TORCS and used to analyze the basic features of human behavior in car driving within the car-following and free-driving setups. Four drivers with different skill in driving real cars participated in these experiments. They were instructed to driver a virtual car without overtaking the lead car driven by ...

The vehicle semi-active suspension system plays an important role in improving the driving safety and ride comfort by adjusting coefficients of damping spring. main contribution this paper is proposal a PPO-based vibration control strategy for system, which designed reward function realizes dynamic adjustment according to road condition changes. More specifically, different performances caused ...

The motion of a car is described using a stochastic model in which the driving processes are the steering angle and the tangential acceleration. The model incorporates exactly the kinematic constraint that the wheels do not slip sideways. Two lters based on this model have been implemented, namely the standard EKF, and a new lter (the CUF) in which the expectation and the covariance of the syst...

car-following models, as the most popular microscopic traffic flow modeling, is increasingly being used by transportation experts to evaluate new intelligent transportation system (its) applications. a number of factors including individual differences of age, gender, and risk-taking behavior, have been found to influence car-following behavior. this paper presents a novel idea to calculate the...