Experimental Study of Phase Transition in Pedestrian Flow
  The transition between low and high density phases is a typical feature of systems with social interactions. This contribution focuses on simple evacuation design of one room with one entrance and one exit; four passing-through experiments were organized and evaluated by means of automatic image processing. The phase of the system, determined by travel time and occupancy, is evaluated with respect to the inflow, a controlled boundary condition. Critical values of inflow and outflow were described with respect to the transition from low density to congested state. Moreover, microscopic analysis of travel time is provided. 
Marek Buk\'a\v{c}ek, Pavel Hrab\'ak, Milan Krb\'alek
cs.MA physics.soc-ph