Helbing, Dirk; Batic, Davide; Schönhof, Martin; … - In: Physica A: Statistical Mechanics and its Applications 303 (2002) 1, pp. 251-260
Traffic flow at low densities (free traffic) is characterized by a quasi-one-dimensional relation between traffic flow and vehicle density, while no such fundamental diagram exists for ‘synchronized’ congested traffic flow. Instead, a two-dimensional area of widely scattered flow-density...