What do we do When Public Transit Needs a Break? A Review of Rapid Transit Disruption and Alternative Service Planning Processes in Three Cities.
AUTHOR: Gina Pryciak. 2025.
Advisor: Rebecca Shakespeare
I found Ginaâs literature review particularly well-reasoned, both as a review of existing knowledge and practices in diversion planning (when a subway line closes for planned repair) and as a compelling argument for her thesis intervention. Her intervention was also particularly thorough â owing to her professional network development in UEP â and profiled and analyzed diversion planning practices in three major transportation networks. Finally, this is a very practical visionary thesis, with takeaways organized around the opportunity of diversion planning to address other transportation infrastructure improvements and behavior change to support a more resilient multimodal transportation network.
ABSTRACT
In Boston, New York City, and Washington, D.C., planned rapid transit service disruptions are a necessary maintenance step towards continued safety and efficiency of aging rail systems. These disruptions are viewed negatively by the public due to disruption of routines. Disruptions are also challenging for transit agencies, as they are costly and may lead to sustained ridership loss. Past research on service disruptions largely focuses on modeling travel behavior during disruptions and establishing bus-bridging as the leading form of alternative service during disruptions. This study aims to fill gaps in the literature around organizational processes during disruptions, using a qualitative approach to investigate primary players and decisions made during service planning. Semi-structured interviews with transportation planners in Boston, New York City, and Washington, D.C., identify leading challenges and opportunities for growth in this field, including a need for more streamlined collaboration and clear processes. Through greater role definition, timeline overlapping, and process clarification, planners may be able to apply a âwindow of opportunityâ theory to disruptions, allowing the negative script around service disruptions to be partially flipped. This study suggests that positive change during disruptions may be possible if periods of disruption and associated planning processes incorporate intentional change around transportation habits, infrastructure improvements, and transit efficiency.
















