Travel Demand Model - OKI

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OKI/MVRPC Travel Demand Model – Version 6.0Employment Data(2-digit SIC)Household TotalsDaily PassengerVehicles TablesAllocation toFAZsTruck Counts(SU, MU)Daily Congested TravelTimes (BPR)SU, MU TripGenerationTruck NetworkSU, MU InternalTrip Ends (P/A)Gravity ModelSeed Matrices(Int-Int Trips)Synthetic MatrixEstimationExpanded ODOTExternal StationSurveyEE, IE, EIEstimatesDaily SU, MUTruck TripTablesFAZ-to-FAZFigure 2-1. Data and processes used to daily create base truck modelTruck Model - Base-Year Truck Model Development 5
OKI/MVRPC Travel Demand Model – Version 6.02.1.1 Freight analysis zonesA system consisting of 161 FAZs was constructed from relatively homogenous groupings of the original2,425 internal zones of the consolidated TAZ system. Contiguous TAZs with similar employment densitiesand general land use types (office/retail, industrial, residential, agricultural) were grouped together.Some special generators such as Dayton International Airport, Greater Cincinnati Northern-KentuckyInternational Airport, Wright-Patterson Air Force Base and Paramount Kings Island Amusement Park wereisolated in single FAZs. A greater number of smaller FAZs were created close to I-75 to facilitate analysis,with fewer FAZs created in rural areas farther away from the Interstate highway system. An additionalconsideration was that no FAZ could straddle a county boundary.A target range of 90-150 FAZs was originally set, based on an initial estimate of the number of truckcount locations in hand; however, the process of forming logical groupings of TAZs and recommendationsfrom the MVRPC staff resulted in the final tally of 161 FAZs. Subsequent testing of this zone system withthe SME procedure and the network and truck count data revealed that this number would not present aproblem.A map of the final FAZ system is shown in Figures 2-2, below.2.1.2 Truck network developmentThe consolidated travel model network developed for the person-vehicle model was imported from itsoriginal Tranplan format into TransCAD for the purpose of developing the truck model. It was necessaryto prune this highly detailed network to support the analysis of truck flows between the coarser FAZs andto reflect the classes of roadways that carry significant truck traffic. The data field indicating theconsolidated administrative classification, represented by numerals 1-6, was used to guide selection oflinks for the truck network. Initially, only the higher-level Classes 1-4 were selected, which includedfreeways, expressways, ramps and major roads, typically U.S. and state roadways. Class 5 links, minorroads, and Class 6 links, centroid connectors, were not included.In many places, however, it was necessary to add links with Class 5 designations in order to preserve theconnectivity of the network. In some cases, Class 5-link roadways were selected in order to includeknown truck count locations. In a few other locations, links designated as Class 4, major arterial,appeared as isolated segments in an otherwise Class 5 roadway and, if not critical to networkconnectivity, were excluded from the network. In a few places, roads with U.S. and state highwaydesignations are subject to local truck prohibitions and were therefore excluded from the truck network.This specifically affected Columbia Parkway (US 50), east of Downtown Cincinnati, and Central Parkway(US 42, US 27, US 52 and SR127) on the north side of the Cincinnati central business district (CBD).All 106 external stations found in the passenger-vehicle network for the consolidated MVRPC-OKI networkwere also included in the truck network.Consistent with the passenger-vehicle network, links were added to represent the portion of I-71 thatpasses through Clinton County, Ohio, between Greene and Warren Counties, as well as connectionsbetween I-71 and US 68, SR 73 and SR 380. Similarly, links were added to represent SR 503 as it passesthrough Preble County, between Butler County and I-70. Neither Clinton County or Preble County arepart of either the MVRPC or the OKI region; however, these particular links were identified as necessaryadditions to avoid mischaracterizing trips that pass through this area as external when in fact they haveboth trip ends within the consolidated study region.Truck Model - Base-Year Truck Model Development 6
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APPENDIX F • TRAVEL DEMAND MODEL
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OKI/MVRPCTravel Demand ModelVersion
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Table of ContentsPart IPart IIPart
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OKI/MVRPC Travel Demand Model - Ver
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Table A.1 (cont.)Zone System Equiva
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Table A.2Zone System Equivalences -
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Table A.3Zone System Equivalences -
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Table B.1External Stations in the C
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Table B.1External Stations in the C
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User Documentation forAutomated Acc
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[Transit Format][New Link Attribute
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distance for each centroid or node.
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Figure 1Example Control File for th
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LinkType = 99VolumeDelay = 99Lanes
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NetworkScale = 1.0 Scale factor to
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Figure 4Example Output from DRVLINK
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Appendix ASample EMME/2 Transit Lin
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Appendix FTravel Demand ModelingTec
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Index of TablesTable 2-1 Socio-Econ
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Index of TablesTable 2-1 Trip Lengt
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Table of Contents1. Background ....
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Index of FiguresFigure 2-1 Alternat
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NORTH-SOUTH TRANSPORTATION INITIATI
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Run # 63: Start with 7.17 estimatio
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Run # 67:Split parking cost from ot
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Run # 70a:Include zero-auto segment
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Run # 71c:Repeat #71a with zero aut
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Run # 71g:Repeat #71d with wait tim
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Run # 73:Include residential densit
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Run # 76:Nest: auto vs transitVaria
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Run # 79:Repeat #72 with zero autos
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Run # 80:Nest: auto vs. all othersV
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Run # 82:(071h) nested: auto vs tra
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Run #3VariableModeDrive Shared Ride
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Run #8VariableModeDrive Shared Ride
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Run #12 test: make aoc=10.5 instead
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Run #29VariableModeDrive Shared Rid
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Run #33VariableModeDrive Shared Rid
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Run #37vot constrained to $7.00Vari
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Run #30bSame as #30a, combine cost
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Run #140 (same as run #40)vot const
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Run #140b (same as run #40)vot cons
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Run #141avot constrained to $3.00 &
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Run #141cvot constrained to $3.00 &
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Run # 1:Base RunVariablesModesDA Sh
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Run # 5:Base Run with walk time set
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Run # 8:Base Run, split walkVariabl
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Run # 10: Nested structure (autos v
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Part VITRIP ASSIGNMENT ANDVALIDATIO
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Index of TablesTable 2-1 Average Ve
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Table of Contents1. Introduction...
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2. Surveys and Other Datasets2.1 OK
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Table 2-1 OKI Home Interview Survey
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Table 1-4 On-Board Survey Data Dict
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2.3 External Station Survey - Conso
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2.4 External Cordon Survey - Consol
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2.5 External-External Trip Table fr
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2.20 Screenline Shape File - Screen
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