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Pages 581-617

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From page 581...
... 1. User's Guide 2.
From page 582...
... Transit Capacity and Quality of Service Manual, 3'd Edition LIST OF EXHIBITS Exhibit 9-1 Examples of Vessels Used for Ferry Transit (2010)
From page 583...
... Ferry system capacity is a relatively undeveloped topic. Organization of Chapter 9.
From page 584...
... Transit Capacity and Quality of Service Manual, 3'd Edition Sections 4-6 are focused toward readers who wish to estimate the capacity of ferry service and are more computation-oriented. OTHER RESOURCES Other TCQSM material related to ferry transit includes: • The "What's New" section of Chapter 1, User's Guide, which describes the changes made in this chapter from the 2nd Edition; • Chapter 2, Mode and Service Concepts, which introduces the ferry mode and the types of vessels used to provide urban ferry transit service in North America; • Chapter 3, Operations Concepts, which provides a general introduction to transit capacity and speed concepts; • Chapter 10, Station Capacity, which provides methods that are applicable to sizing passenger circulation elements of ferry terminals, docks, and berths; and • The manual's CD-ROM, which provides a spreadsheet that implements this chapter's capacity methods, along with a link to an electronic version of TCRP Report 152.
From page 585...
... Exhibit 9-1 Examples of Vessels Used for Ferry Transit (2010) Multi-destination routes introduce a number of difficult operational problems that may affect capacity.
From page 586...
... Transit Capacity and Quality of Service Manual, 3'd Edition Ferry Speed Concepts A vessel's mechanical properties, such as propulsion, will affect the vessel's speed and the resulting travel time over a route. Types of propulsion include fixed pitch propeller or controllable pitch propeller, which are common to monohull vessels; water jet, which is common to catamarans; and cable.
From page 587...
... Freeboard is the vertical distance between the waterline and the vessel deck or the top of a dock. Exhibit 9-2 Examples of Auto and Passenger Ferry Dock Configurations Transit Capacity and Quality of Service Manual, 3rd Edition for making intermodal transfers.
From page 588...
... Transit Capacity and Quality of Service Manual, 3rd Edition Passenger loading for auto ferries can occur via the vehicle transfer span (typically on smaller ferries) or by means of a separate walkway directly to the passenger deck, which is generally about 18ft (5.5 m)
From page 589...
... Exhibit 9-3 Illustrative Vehicle Staging Area Diagram Exhibit 9-4 Vehicle Staging Area Examples A vessel's capacity to transport vehicles is measured in auto equivalent units {AEUs) that reflect the amount of space used by each vehicle type.
From page 590...
... Transit Capacity and Quality of Service Manual, 3rd Edition crewmembers or staff only. Auto ferries between St.
From page 591...
... Exhibit 9-5 Typical Elements of Passenger Ferry Loading Passenger holding (waiting) area sizing and LOS is discussed in detail in Chapter 10.
From page 592...
... Transit Capacity and Quality of Service Manual, 3'd Edition Department of Homeland Security to ensure that capacity calculations properly reflect the local procedures. The loading hold point is also the location where passengers are released from the holding area and allowed to proceed to the vessel.
From page 593...
... With bow loading, ferries bump against the dock and a gangway is dropped down onto the deck. This saves time in comparison to a ferry maneuvering in, tying up, and a gangway deploying.
From page 594...
... Transit Capacity and Quality of Service Manual, 3'd Edition (a) San Francisco (Ferry Building)
From page 595...
... Transit Capacity and Quality of Service Manual, 3'd Edition ranges in excess of 20ft (6 m)
From page 596...
... Transit Capacity and Quality of Service Manual, 3rd Edition 3. FERRY SCHEDULING AND SERVICE PLANNING The discussion of ferry scheduling and service planning is most easily illustrated by considering all of the steps involved in a one-way ferry trip.
From page 597...
... Fare payment does not affect passenger service time when fares are collected at the entrance to a fare-paid passenger waiting area. Transit Capacity and Quality of Service Manual, 3'd Edition Resupply: time is required to re-stock the vessel with supplies, which may include food or on board vending, fuel, and other items necessary for each journey.
From page 598...
... Transit Capacity and Quality of Service Manual, 3'd Edition time to traverse the loading area facilities, which is a function of the length and width of the access walkway /roadway, and the boarding ramp or gangway. Internal vessel circulation: similar to disembarking, the internal vessel design or floor plan may restrict the flow of passengers onto the ferry, which may affect the schedule in extreme cases.
From page 599...
... Transit Capacity and Quality of Service Manual, 3'd Edition route, including typical sea, wind, and weather conditions as well as currents and the effects of other waterborne vessel traffic. ARRIVAL TIME Similar to departure time, these steps occur in the reverse order when approaching the port: Harbor traffic: high levels of harbor traffic may impact the time it takes for the ferry to arrive at the dock; such impacts require additional schedule time to ensure on-time arrivals.
From page 600...
... Transit Capacity and Quality of Service Manual, 3rd Edition PEDESTRIAN MOVEMENTS The previous section provided a brief overview of the elements that may affect scheduling of ferry service. A number of these elements involve pedestrian flow concepts which are further developed in Chapter 10, Station Capacity.
From page 601...
... Exhibit 9-8 Example of MultipleDestination Service Transit Capacity and Quality of Service Manual, 3'd Edition ferry transit service is that it does not allow for "memory" or "clockface" schedules, in which a ferry departs for a destination at regular, repetitive times (e.g., at 20 and 50 min after the hour)
From page 602...
... Transit Capacity and Quality of Service Manual, 3'd Edition When multiple ferry routes serve a common destination, interlining routes is another option for minimizing the number of vessels required. For example, if one route has a 35-min sailing time (70-min round trip including required layover time and operating margin)
From page 603...
... Exhibit 9-9 Vessel Capacity Measurement Locations Transit Capacity and Quality of Service Manual, 3'd Edition 4. VESSEL CAPACITY Vessel capacity can be calculated for two key locations: berth and dock facility.
From page 604...
... Transit Capacity and Quality of Service Manual, 3'd Edition T = 60 min In situations where vessel capacity is not anticipated to be an issue, quantifying the loading time enables planners and ferry operators to estimate a new route's travel time and to isolate any design issues related to the loading facilities. The vessel capacity of the dock facility is a function of the capacity of the individual berths.
From page 605...
... Equation 9-1 Equation 9-2 No default values are currently available for ferry capacity parameters; field data collection is suggested. Transit Capacity and Quality of Service Manual, 3'd Edition Disembarking/Embarking Time Factors Berth Vessel Capacity The maximum number of vessels per hour that a berth can accommodate based on a given passenger demand is given by the following expression: where 3,600 Vb=-tv Vb = vessel capacity of the berth (vessels/h)
From page 606...
... Transit Capacity and Quality of Service Manual, 3'd Edition pedestrian flow procedures for stations presented in Chapter 10, Station Capacity. For activities that overlap, care must be taken to use the time from the slowest combination of activities, since this will control the maximum embarking or disembarking rate.
From page 607...
... For relatively uncongested situations (i.e., walkway LOS Cor better) with no steep grades, 250ft/min (75 m/min)
From page 608...
... Transit Capacity and Quality of Service Manual, 3'd Edition ft/min (75 mjmin)
From page 609...
... Equation 9-5 Transit Capacity and Quality of Service Manual, 3'd Edition DOCK CAPACITY The vessel capacity of the dock represents the total number of vessels that can be served at the dock facility per hour. The dock facility capacity is the sum of the vessel capacities of the individual berths making up the dock, as shown in Equation 9-5: where V = dock vessel capacity (vessels/h)
From page 610...
... Transit Capacity and Quality of Service Manual, 3'd Edition 5. PASSENGER AND AUTO CAPACITY The passenger capacity can be calculated at a number oflocations along the passenger's path of travel.
From page 611...
... Equation 9-6 Transit Capacity and Quality of Service Manual, 3rd Edition exceed the vessel's passenger (auto) capacity.
From page 612...
... Transit Capacity and Quality of Service Manual, 3rd Edition 6. CALCULATION EXAMPLES Example Description 1 Vessel service time (passengers)
From page 613...
... Transit Capacity and Quality of Service Manual, 3'd Edition • From Exhibit 10-27, average capacities for manual ticket collection are 30 pjmin (i.e., 2 sjp )
From page 614...
... Transit Capacity and Quality of Service Manual, 3'd Edition ted= 94 S Step 4: Calculate the Vessel Service Time Finally, using Equation 9-2, the average vessel service time tv is the sum of the calculated embarking and disembarking time ted and the clearance time tc given in the problem statement. (The operating margin shown in Equation 9-2 does not need to be included, as only the vessel service time is of interest in this example.)
From page 615...
... Transit Capacity and Quality of Service Manual, 3rd Edition Comments and Assumptions • The clearance time, based an investigation of similar mooring and gangway technology, is estimated to be 3 min (1.5 min upon arrival and 1.5 min upon departure)
From page 616...
... Transit Capacity and Quality of Service Manual, 3'd Edition The Facts • The observed average passenger embarking and disembarking time t ed at the berth is 3 min; however, this time can vary somewhat from one ferry to the next. • The observed average clearance time is a total of 4 min (2 min upon arrival and 2 min upon departure)
From page 617...
... Transit Capacity and Quality of Service Manual, 3'd Edition 7.

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