@article{ref1,
title="A method to account for non-steady state conditions in measuring traffic hysteresis",
journal="Transportation research part C: emerging technologies",
year="2013",
author="Ahn, Soyoung and Vadlamani, Sravani and Laval, Jorge",
volume="34",
number="",
pages="138-147",
abstract="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 />",
language="en",
issn="0968-090X",
doi="10.1016/j.trc.2011.05.020",
url="http://dx.doi.org/10.1016/j.trc.2011.05.020"
}