%0 Journal Article
%T A method to account for non-steady state conditions in measuring traffic hysteresis
%J Transportation research part C: emerging technologies
%D 2013
%A Ahn, Soyoung
%A Vadlamani, Sravani
%A Laval, Jorge
%V 34
%N 
%P 138-147
%X This paper investigates the hysteresis loops commonly observed in freeway traffic flow by analyzing the evolution of speed-spacing relationships as vehicles undergo stop-and-go oscillations. The measurement method is based on the kinematic wave model with variable wave speed to account for non-steady state conditions that arise during acceleration/deceleration. We find that hysteresis takes place less frequently and in smaller amplitude than previously thought.<p />
%G en
%I Elsevier Publishing
%@ 0968-090X
%U http://dx.doi.org/10.1016/j.trc.2011.05.020