Transport for London (TfL) recently conducted a study to decide whether introducing a new rule imposing passengers to stand on the escalators was the best way to decongest passengers' traffic in some of the busiest underground stations during peak hours. Measurements of traffic were taken in Holborn and Bank stations for 6 months before introducing the new rule and for 6 months afterwards. Results showed a difference in capacity between pre- and post-intervention: the 'standing-only' escalators were able to carry an average of 151 passengers per minute, compared to 115 on the 'walking' escalator, where people were both walking and standing. TfL used a(n):

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The study conducted by TfL is an interrupted time-series design, as it involves measuring traffic before and after introducing the new rule, and comparing the differences in capacity between the two types of escalators. This type of design is commonly used in transportation planning and policy evaluation to assess the impact of interventions on traffic flow and congestion.

Transport for London (TfL) Recently Conducted a Study to Decide