Contextual Bayesian optimization of congestion pricing with day-to-day dynamics

Renming Liu, Yu Jiang, Ravi Seshadri, Moshe Ben-Akiva and Carlos Lima Azevedo

Transportation Research Part A: Policy and Practice, 2024, vol. 179, issue C

Abstract: Congestion pricing is a common approach to alleviate urban traffic congestion. The design of second-best congestion pricing schemes is typically formulated as non-linear programming and bi-level optimization problems, where the lower-level problem involves either a static or dynamic network equilibrium model. The complexity of these bi-level toll optimization problems increases considerably when incorporating day-to-day dynamic models of travel behavior and dynamic models of network congestion. These models are often operationalized using simulation, and consequently, the toll design problem is a computationally challenging simulation-based optimization problem where the evaluation of a single candidate pricing scheme involves simulating the day-to-day model until convergence. In order to circumvent this issue, we propose a contextual Bayesian optimization (BO) framework, where the BO scheme is embedded within the day-to-day dynamic model by using temporal contextual information. The framework implicitly incorporates the relationship between the objective function across days and uses past days’ observations (function evaluations) as weak priors when constructing the Gaussian process underlying the BO algorithm for the current day’s toll optimization problem, resulting in gains in computational efficiency.

Keywords: Congestion pricing; Demand management; Day-to-day dynamics; Contextual Bayesian optimization (search for similar items in EconPapers)
Date: 2024
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DOI: 10.1016/j.tra.2023.103927

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