Uncertainty in travel time is one of the key factors that could allow us to understand and manage congestion in transportation networks. Models that incorporate uncertainty in travel time need to specify two mechanisms: the mechanism through which travel time uncertainty is generated and the mechanism through which travel time uncertainty influences users’ behavior. Existing traffic equilibrium...

Based on a theoretical framework that derives information flows associated to economic and social transactions, intersectoral, point-to-point telecommunication flow functions are specified and estimated, using a very large data base on intra-LATA toll calls and a simultaneous equation estimation procedure that accounts for the endogeneity of reverse call flows. The effects of prices, distances,...

Traffic assignment models based on user equilibrium approaches are one of the most widely used tools in transportation planning analysis. The modeling hypotheses, soundly based on the well established concept of equilibrium, lead to nice mathematical models for which there are efficient algorithms that provide solutions in terms of the expected flows on network links, Florian and Hearn, 1995. M...

Bike sharing has recently enabled sustainable means of shared mobility through automated rental stations in metropolitan areas. Spatio-temporal variation of bike rentals leads to imbalances in the distribution of bikes causing full or empty stations in the course of a day. Ensuring the reliable provision of bikes and bike racks is crucial for the viability of these systems. This paper presents ...

Myosin II propelled actin filaments move ten times faster than kinesin driven microtubules and are thus attractive candidates as cargo-transporting shuttles in motor driven lab-on-a-chip devices. In addition, actomyosin-based transportation of nanoparticles is useful in various fundamental studies. However, it is poorly understood how actomyosin function is affected by different number of nanos...

Multicondition-driven mechanisms may produce pyroclastic deposits varying in fundamental properties such as dispersal, grain size, vesicularity and morphology of juvenile clasts, and the abundance of lithic or ‘‘wall rock’’ ejecta (xenoliths). Volcanic ash particles from different fragmentation mechanisms have different surface textures and morphologies. The analysis of the volcanic clast shape...

A critical phenomenon is an intrinsic feature of traffic dynamics, during which transition between isolated local flows and global flows occurs. However, very little attention has been given to the question of how the local flows in the roads are organized collectively into a global city flow. Here we characterize this organization process of traffic as "traffic percolation," where the giant cl...