Reference

Traffic Flow (http://en.wikipedia.org/wiki/Traffic_flow)

Three-Phase Traffic Theory (http://en.wikipedia.org/wiki/Three-phase_traffic_theory)

Traffic Congestion (http://en.wikipedia.org/wiki/Traffic_congestion:_Reconstruction_with_Kerner%E2%80%99s_three-phase_theory)

Fundamental Diagram of Traffic Flow (http://en.wikipedia.org/wiki/Fundamental_diagram_of_traffic_flow)

Yang and Michailidis, Sampled Based Estimation of Network Traffic Flow Characteristics

Kachroo, Ozbay and Hobeika, Real-time travel time estimation using macroscopic traffic flow models

Lee and Bovik, Estimation and Analysis of Urban Traffic Flow