Monday, April 27, 2015

Spatial Fluctuations of Pedestrian Velocities in Bidirectional Streams: Exploring the Effects of Self-Organization

Saberi, M., Aghabayk, K., Sobhani, A. (2015) Spatial Fluctuations of Pedestrian Velocities in Bidirectional Streams: Exploring the Effects of Self-Organization, Physica A: Statistical Mechanics and Its Applications (in press) doi:10.1016/j.physa.2015.04.008
Abstract 
Individual pedestrian velocities vary over time and space depending on the crowd size, location of individuals’ within the crowd, and formation of self-organized lanes. We use empirical data to explore the spatial fluctuations of pedestrian velocities in bidirectional streams. We find that, unlike ordinary fluids, the velocity profile in bidirectional pedestrian streams does not necessarily follow a hyperbolic form. Rather, the shape of the velocity profile is highly dependent on the formation of self-organized lanes. We also show that the spatial fluctuations of pedestrian velocities along and transverse to the flow direction are widely distributed and can be modeled by a sum of Gaussian distributions. Results suggest that the effect of self-organization phenomenon is strong enough that for the same crowd size, the velocity distribution does not significantly change when pedestrians are highly mixed compared to when separate lanes are formed.
Link to the published paper: http://www.sciencedirect.com/science/article/pii/S0378437115003672

Tuesday, April 14, 2015

Melbourne Truck Volume Ratio Map (2012)

Extending our previously released Melbourne Truck Volume Map (2012) <http://goo.gl/JfRGyh>, we have developed a new visualization, this time showing the truck volume ratios (Average Daily Truck Traffic, ADTT over Annual Average Daily Traffic, AADT). The new map provides a different picture of exposure to truck traffic in Melbourne. Please see the new map here: http://goo.gl/pPxziX


Thursday, April 2, 2015

Prof. Brian Wolshon and Dr. Vinayak Dixit visit ITS Monash

Prof. Brian Wolshon from Louisiana State University (LSU) and Dr. Vinayak Dixit from University of New South Wales (UNSW) visit ITS Monash and presented some of their recent research projects.