Travel Reliability

Travel reliability is important for highway users because it provides information that allows travelers to plan for on-time arrival with a higher degree of certainty. Commuters can plan their daily trips to work during peak hours, parents can plan their afternoon run to the daycare center, businesses know when a just-in-time shipment must leave the factory, and transit agencies can develop reliable schedules.

Travel reliability includes the following performance measure:

  • Modal Reliability: Variability of travel time compared to free-flow travel time, by mode.