An ensemble Kalman filtering approach to highway traffic estimation using GPS enabled mobile devices

Traffic state estimation is a challenging problem for the transportation community due to the limited deployment of sensing infrastructure. However, recent trends in the mobile phone industry suggest that GPS equipped devices will become standard in the next few years. Leveraging these GPS equipped devices as traffic sensors will fundamentally change the type and the quality of traffic data collected on large scales in the near future. New traffic models and data assimilation algorithms must be developed to efficiently transform this data into usable traffic information. In this work, we introduce a new partial differential equation (PDE) based on the Lighthill-Whitham-Richards PDE, which serves as a flow model for velocity. We formulate a Godunov discretization scheme to cast the PDE into a Velocity Cell Transmission Model (CTM-v), which is a nonlinear dynamical system with a time varying observation matrix. The Ensemble Kalman Filtering (EnKF) technique is applied to the CTMv to esti...

• Type: Conference
• Year: 2008
• Where: CDC
• Authors: Daniel B. Work, Olli-Pekka Tossavainen, Sebastien Blandin, Alexandre M. Bayen, Toch Iwuchukwu, Ken Tracton
• Keywords: CDC 2008, Control Systems, Traffic Data, Traffic State Estimation, Usable Traffic Information