Work

Exploiting the flexibility of modular buses in an urban transit system

Year: 2025

Type: article

Abstract: Urban transit systems usually operate according to fixed-route and fixed-schedule schemes by employing fixed-capacity vehicles, despite the mobility demand is unevenly spread out in both space and time. Modular buses are an emerging technology inwhich modules of relatively small capacity can be dynamically docked together to form greater capacity buses and can, therefore, make the transit system capable of adapting the capacity to the actual mobility demand. A module can be shifted from one line toanother at pre-defined intersections and can be relocated when empty, if beneficial. We call these two operations sharing and rebalancing, respectively. Given a transport network comprising multiple bus lines and a mobility demand, we present an integer linearprogram to determine an optimal assignment of modules to lines, so that the mobility demand is met with a minimum total number of modules. We prove theoretically that there is no bound to the reduction of the number of modules deployed with respect toa setting without sharing and rebalancing. Computational experiments show that, by exploiting the flexibility of modular buses, the total capacity deployed can be reduced by 49% with respect to a conventional transit system, whereas the average occupancyratio increases from 41.22% to 72.85%.

Source: Transportation Research Part C Emerging Technologies

DOI: 10.1016/j.trc.2025.105119

Authors: Carlo Filippi, Gianfranco Guastaroba, Lorenzo Peirano, M. Grazia Speranza

Institution: University of Brescia

Language: English

Topic: Transportation Planning and Optimization

Subfield: Transportation

Field: Social Sciences

Domain: Social Sciences

SDGs: Industry, innovation and infrastructure, Sustainable cities and communities

Open Access status: hybrid

Estimated APC paid: $4,040