What defines a peak period in transit operations?

• A. The time interval with highest passenger demand, often affecting frequency and capacity.
• B. The period during which trains run express-only service.
• C. The time of day with no trains running.
• D. The season with the most tourism traffic.

Answer: (B)

The peak period is defined by the time interval when passenger demand is highest, which drives how often trains run and how much capacity is needed. This is the feature that operational plans target—matching service frequency and capacity to the surge in riders.

Express-only service, while it can occur during busy times, is a service pattern rather than the defining characteristic of peak periods. A time of day with no trains describes an off-peak or inactive period, not peak. Seasonal tourism can influence demand, but peak periods are specifically about the highest demand within a schedule, and how service adjusts to that demand.