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Chapter 5 - Example Capacity Procedures Use
Pages 54-59

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From page 54...
... , resulting in the potential for two vessel landings to be added during the peak hour. The feasibility of fully using available berthing capacity within the peak period depends on sailing schedules and the frequency of vessel sailings and may mean that vessel landings 54
From page 55...
... Step 2: Evaluate Current Passenger Throughput and Dwell Time In Step 1, the operator estimated that two additional vessel landings per hour could be accommodated during the peak period using current scheduled dwell times. To understand whether the increased passenger volumes from two added sailings can be accommodated in the terminal facilities connecting to the vessel without affecting dwell times, the operator must assess the embarking and disembarking capacity of the terminal.
From page 56...
... Therefore, review of operating margin requires a policy decision regarding agency priorities. For example, if the agency's goal is an overall 95% on-time performance target, then no additional operating margin is required for peak period sailings because the reduced demand and lower dwell-time requirements outside of the commute hours allow vessels to get back and stay on schedule so that they can meet the on-time performance target.
From page 57...
... Because the new vessel may not have the same service schedule, LOS planning may include trade-off decisions between vessel size and service frequency. In this example, the operator defines its LOS based on a maximum wait time of 1 hour for vehicles, using forecast vehicle demand during the peak hour of the 90th percentile demand day for a 15-year planning horizon.
From page 58...
... Assessment of the increase to vehicle capacity with the replacement vessel should also include assessing potential impacts to the service schedule. Because the time required to load and unload vehicles is typically the controlling factor for dwell time, understanding the impact of the number of vehicles carried by the replacement vessel is key to planning service frequency.
From page 59...
... During peak demand periods when the holding area capacity is exceeded and vehicles queue along the roadway outside of the terminal, the operator reviews the recorded queue length and estimates the number of vehicles in the queue after a sailing departs based on the estimated location of the last vehicle. To facilitate this data collection process, the operator has several marked locations with associated vehicle counts, estimated using Equation 4.


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