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Travel Time Reliability:
Making It There On Time, All The Time
This figure is a text-based flow chart that shows how reliability measures are used and by whom. In Level 1, reliability measures are used by upper management, public relations, and planners to determine travel conditions. In Level 2, measures that indicate delay by source are used by mid-management, operators, and planners to determine what is causing unreliable travel. The delay could be caused by work zones, weather, special events, incidents, traffic control, demand variability, and lack of base capacity. In Level 3, operators and field managers develop activities, policies, and procedures to determine what aspects of operations, management, and construction need to be improved.
Figure 7. Establish who will use reliability measures and how they will use them
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