Abstract
Like many cities across North America, Montréal has experienced shrinking bus ridership over recent years. Most literature has focused on the broader causes for ridership decline at the metropolitan or city level; few have considered ridership at the route level, particularly while accounting for various operational attributes and accessibility-to-jobs issues. Because service adjustments take place—and are felt by riders—at the route level, it is essential to explore bus-ridership phenomena at this same scale. Our study explores the determinants of bus ridership at the route level between 2012 and 2017 using two longitudinal random-coefficients models in Montréal. Our findings suggest that increasing the number of daily bus trips along a route and improving the average route speed are key factors in securing bus ridership gains. The service area’s regional accessibility to jobs by public transit around the route has a positive impact on bus ridership at the route level, showing the importance of land use and network structure. Additionally, our models show that reducing service frequency along a parallel route will lead to an increase in ridership along the main route. This study can be of use to transit planners and policymakers who require a more granular understanding of the factors that affect ridership at the route level.





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Acknowledgements
The author would like to thank the anonymous reviewres for their feedback on the earlier version of the manuscript. The authors would like to thank Social Sciences and Humanities Research Council (SSHRC), Natural Sciences and Engineering Research Council of Canada (NSERC), and the Centre interuniversitaire de recherche sur les réseaux d’entreprise, la logistique et le transport (CIRRELT) for their funding support. A big thank you to Jason Magder (Montréal Gazette) for securing the original ridership data by route from the STM through an Access to Information Act Request. The authors would like also to thank Rania Wasfi for helping in conceptualizing the required modelling approach.
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The authors confirm contribution to the paper as follows: study conception and design: Diab, Chaloux, El-Geneidy; data collection: Chaloux, DeWeese; analysis and interpretation of results: Diab, Chaloux, DeWeese, El-Geneidy &; draft manuscript preparation: Diab, Chaloux, DeWeese & El-Geneidy. All authors reviewed the results and approved the final version of the manuscript.
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Diab, E., DeWeese, J., Chaloux, N. et al. Adjusting the service? Understanding the factors affecting bus ridership over time at the route level in Montréal, Canada. Transportation 48, 2765–2786 (2021). https://doi.org/10.1007/s11116-020-10147-3
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DOI: https://doi.org/10.1007/s11116-020-10147-3

