Commuter patterns have become less predictable, forcing city planners to build timetables around flexible peaks rather than a single morning surge.
New passenger data shows Tuesdays through Thursdays remain the busiest office travel days, while Mondays and Fridays now carry more leisure and airport traffic than before the pandemic.
Operators say the change is not a simple fall in demand. Instead, journeys are more varied, more sensitive to disruption, and more likely to involve mixed modes such as rail, bikes, and walking.
The result is a fresh round of experiments in fare incentives, station staffing, and service frequency designed to make the system feel dependable even when demand is uneven.