A Framework to Integrate Mode Choice in the Design of Mobility-on-Demand Systems

TL;DR

This paper presents a comprehensive framework integrating mode choice into the design of Mobility-on-Demand systems, enabling analysis of induced demand, transit impacts, and policy effects within a multimodal urban transportation context.

Contribution

It introduces a unified, demand-responsive framework for MoD system design, optimization with Bayesian methods, and policy analysis, addressing limitations of fixed-demand models.

Findings

Bayesian optimization effectively determines optimal MoD parameters.

The framework accurately predicts mode choice and demand shifts.

Policy simulations demonstrate the impact of ride-hailing taxes.

Abstract

Mobility-on-Demand (MoD) systems are generally designed and analyzed for a fixed and exogenous demand, but such frameworks fail to answer questions about the impact of these services on the urban transportation system, such as the effect of induced demand and the implications for transit ridership. In this study, we propose a unified framework to design, optimize and analyze MoD operations within a multimodal transportation system where the demand for a travel mode is a function of its level of service. An application of Bayesian optimization (BO) to derive the optimal supply-side MoD parameters (e.g., fleet size and fare) is also illustrated. The proposed framework is calibrated using the taxi demand data in Manhattan, New York. Travel demand is served by public transit and MoD services of varying passenger capacities (1, 4 and 10), and passengers are predicted to choose travel modes according to a mode choice model. This choice model is estimated using stated preference data collected in New York City. The convergence of the multimodal supply-demand system and the superiority of the BO-based optimization method over earlier approaches are established through numerical experiments. We finally consider a policy intervention where the government imposes a tax on the ride-hailing service and illustrate how the proposed framework can quantify the pros and cons of such policies for different stakeholders.