A TRAFFIC FUNDAMENTAL DIAGRAM CALIBRATING METHODOLOGY TO AVOID UNBALANCED SPEED–DENSITY OBSERVATIONS

Derivation of a Fundamental Diagram for Urban Traffic Flow

Despite the importance of urban traffic flows, there are only a few theoretical approaches to determine fundamental relationships between macroscopic traffic variables such as the traffic density, the utilization, the average velocity, and the travel time. In the past, empirical measurements have primarily been described by fit functions. Here, we derive expected fundamental relationships from ...

Threshold queueing describes the fundamental diagram of uninterrupted traffic

Greenshields [13] captures the empirical relation between speed, flow and density for uninterrupted traffic in the fundamental diagram, see Figure 1. Mathematical models for uninterrupted traffic have been developed and the fundamental diagram in its basic form is now well-understood, see e.g. Newell [29, 30, 31] for a concise exposition. Traffic jams are a major concern for highway operation a...

Stochastic Fundamental Diagram for Probabilistic Traffic Flow Modeling

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75 Years of the Fundamental Diagram for Traffic Flow Theory: Greenshields Symposium

Calibrating Surface Weather Observations to Atmospheric Attenuation Measurements

A correlation between near-infrared atmospheric attenuation measurements made by the Atmospheric Visibility Monitor (AVM) at the Table Mountain Facility and airport surface weather observations at Edwards Air Force Base has been performed. High correlations (over 0.93) exist between the Edwards observed sky cover and the average AVM measured attenuations over the course of the 10 months analyze...