Friday Seminar: Improving Bus Service with a Scalable Dynamic Holding Control

Commuter Warning

This week's Friday Seminar features UC Berkeley Ph.D. candidate Juan Argote presenting his research on control methods for transit services in, "Improving Bus Service with a Scalable Dynamic Holding Control":

Service unreliability is widely recognized as one of the main deterrents for travelers to use buses as their mode of transportation. Bus systems are exposed to an adverse feedback loop that generates a tendency for them to fall out of sync. This tendency can be counteracted by the application of control strategies that regulate the motion of the buses. This is well known among transit operators and some research has been devoted to address the issue. However, existing methods that are simple enough to be scalable can only handle headway-based operations of a single line.

This research proposes a scalable control method that applies dynamic holding based on real-time conditions and that allows buses to stay on schedule. A formulation that generalizes dynamic holding control strategies is developed for isolated bus lines. Stability conditions are derived and a quasi-optimal control that requires minimal data is also presented. The performance of this control is validated through simulation. The control is then extended to corridors where multiple bus lines overlap. A real-world case study in San Sebastián, where a system of coordinated on-board devices was deployed, is used to validate the control performance in this type of scenario. Finally, the resilience of the control is assessed considering multiple potential adversities.

The seminar takes place on Friday, April 25 in 534 Davis from 4-5 PM. Cookie Hour will be in the library at 3:30.