Browsing by Author "Witheridge, S."

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    Adapting Traffic Simulation for Traffic Management: A Neural Network Approach
    (2013-10) Passow, Benjamin N.; Elizondo, David; Chiclana, Francisco; Witheridge, S.; Goodyer, E. N.
    Static models and simulations are commonly used in urban traffic management but none feature a dynamic element for near real-time traffic control. This work presents an artificial neural network forecaster methodology applied to traffic flow condition prediction. The spatially distributed architecture uses life-long learning with a novel adaptive Artificial Neural Network based filter to detect and remove outliers from training data. The system has been designed to support traffic engineers in their decision making to react to traffic conditions before they get out of control. We performed experiments using feed-forward backpropagation, cascade-forward back-propagation, radial basis, and generalized regression Artificial Neural Networks for this purpose. Test results on actual data collected from the city of Leicester, UK, confirm our approach to deliver suitable forecasts.
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    Analysis of EnviSat RA-2 burst echoes over lake surfaces.
    (European Space Agency, 2010) Witheridge, S.; Berry, P. A. M.; Smith, R. G.
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    Global inland water monitoring from Satellite Radar Altimetry - A glimpse into the future.
    (European Space Agency, 2010) Berry, P. A. M.; Smith, R. G.; Witheridge, S.; Wheeler, J.
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    Logan's run: Lane optimisation using genetic algorithms based on nsga-ii
    (IEEE, 2014-07-06) Witheridge, S.; Passow, Benjamin N.; Shell, Jethro
    Whilst bus lanes are an important tool to ensure bus time reliability their presence can be detrimental to urban traffic. In this paper a Non-dominated Sorting Genetic Algorithm (NSGA-II) has been adopted to study the effect of bus lanes on urban traffic in terms of location and time of operation. Due to the complex nature of this problem traditional search would not be feasible. An artificial arterial route has been modelled from real data to evaluate candidate solutions. The results confirm this methodology for the purpose of studying and identifying bus lane locations and times of operation. Additionally it is shown that bus lanes can exist on an arterial link without exclusively occupying a continuous lane for large periods of time. Furthermore results indicate a use for this methodology over a larger scale and potential near real-time operation.