Search Results for author: Roman Engelhardt

Found 5 papers, 0 papers with code

Effects of Dynamic and Stochastic Travel Times on the Operation of Mobility-on-Demand Services

no code implementations10 Aug 2023 Fynn Wolf, Roman Engelhardt, Yunfei Zhang, Florian Dandl, Klaus Bogenberger

As travel times in real street networks are dynamic and stochastic, assigned routes considered feasible by the control algorithm in one time step might become infeasible in the next.

Travel Time Estimation

Predictive Vehicle Repositioning for On-Demand Ride-Pooling Services

no code implementations10 Aug 2023 Roman Engelhardt, Hani S. Mahmassani, Klaus Bogenberger

This imbalance would lead to low fleet utilization and high customer waiting times.

Redesigning Large-Scale Multimodal Transit Networks with Shared Autonomous Mobility Services

no code implementations29 Jul 2023 Max T. M. Ng, Hani S. Mahmassani, Ömer Verbas, Taner Cokyasar, Roman Engelhardt

This study addresses a large-scale multimodal transit network design problem, with Shared Autonomous Mobility Services (SAMS) as both transit feeders and an origin-to-destination mode.

Autonomous Vehicles

Simulating Ride-Pooling Services with Pre-Booking and On-Demand Customers

no code implementations13 Oct 2022 Roman Engelhardt, Florian Dandl, Klaus Bogenberger

That the graph-based batch optimization is superior to a basic insertion method in terms of solution quality and run-time.

On the Dynamism of User Rejections in Mobility-on-Demand Systems

no code implementations3 Apr 2021 Florian Dandl, Roman Engelhardt, Klaus Bogenberger

Under certain assumptions, which are reasonable for an attractive MoD business model, it can be shown that an operator using dynamic state optimization can communicate a rejection to users after the first iteration, thereby eliminating unnecessary waiting time before these users would leave the system.

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