An enhanced SPSA algorithm for the calibration of Dynamic Traffic Assignment models
W-SPSA, an enhanced SPSA algorithm that limits the impact of noise, is presented. W-SPSA incorporates information of spatial and temporal correlation in a traffic network to a weight matrix. Implementation details in the context of Dynamic Traffic Assignment (DTA) models are discussed. Benefits of W-SPSA are illustrated in a case study of the entire expressway network in Singapore. W-SPSA appears to outperform the original SPSA algorithm.
calibration dynamic traffic assignment simultaneous perturbation stochastic approximation (spsa) weighted spsa (w-spsa)