Izvorni znanstveni članak
https://doi.org/10.7307/ptt.v34i4.4049
Cellular Automata Model for Traffic Flow with Optimised Stochastic Noise Parameter
Sheng Liu
; Beijing Key Laboratory of Traffic Engineering, Beijing University of Technology
Dewen Kong
; Beijing Key Laboratory of Traffic Engineering, Beijing University of Technology
Lishan Sun
; Beijing Key Laboratory of Traffic Engineering, Beijing University of Technology
Sažetak
Based on the existing safe distance cellular automata model, an improved cellular automata model based on realistic human reactions is proposed in this paper, which aims to reproduce the characteristics of congested traffic flow. In the proposed model, the stochastic noise param-eter is optimised by considering driving behavioural dif-ference. The relative speed, gap and acceleration of the front vehicle are introduced into the optimised stochastic noise parameter oriented to describing the asymmetric acceleration behaviour of drivers in congestion. The sim-ulation results show that an uneven distribution of accel-eration trajectories of vehicles experiencing congestion exhibited on the spatial-temporal diagram of the pro-posed model is reproduced. Based on the analysis of the NGSIM, compared with the model with traditional sto-chastic noise parameter, the vehicles that move accord-ing to the proposed model can follow more easily and more realistically. Then the actual gap of vehicles can be better reflected by the proposed model and the change of vehicle speed is more stable. Additionally, the traffic efficiency from two aspects of flow and speed shows that the proposed model can significantly improve the traffic efficiency in the medium high density region.
Ključne riječi
heterogeneous traffic flow; stochastic noise parameter; cellular automata; car-following behaviour
Hrčak ID:
285185
URI
Datum izdavanja:
5.7.2022.
Posjeta: 238 *