A car-following dynamic model with headway memory and evolution trend

Integrating headway evolution information into the existing memory car-following model, a new car-following dynamic model with headway memory and evolution trend is proposed in this paper. The objective of this research is to investigate the impacts and improvements of a combined consideration of headway memory and evolution trend on micro driving behaviors and the stability of traffic flow. The neutral stability condition of the proposed model is obtained by means of linear stability theory. The model is investigated in detail by numerical comparison under two typical cases, where Case I is the starting process and Case II is the development process of a small perturbation. Numerical results show that driver's headway memory and evolution trend have opposite impacts on the stability of traffic flow, which means the extended car-following model can compensate for unavoidable sensory memory delay for the reliability of headway perception and effectively suppress traffic congestion since the headway evolution trend effect is taken into account. (C) 2019 Elsevier B.V. All rights reserved.