Travel Demand Model - OKI

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OKI/MVRPC Travel Demand Model – Version 6.07. Non-Home Based Trip GenerationThe OKI/MVRPC model retains the non-home based trip generation technique of the OKI Version5.4 model. The philosophy behind this technique is that non-home based trips are derived fromhome-based trips, because NHB trips occur in between home based trips. The OKI model appliesNHB trip generation rates that are a function of mode and area type, and that vary by homebasedtrip purpose. This trip generation model is applied to all OKI and MVRPC zones in theconsolidated system.Non-Home based trip rates are mode-dependent; for this reason non-home based trip generationoccurs after mode choice in the model stream. Due to changes in the execution of the modechoice model, in the current version of the OKI/MVRPC model (6.0) all non-home based tripgeneration calculations take place in a new step, Step 35. Please refer to the User’s Guide fordetails on model application.Table 7.1 shows the OKI/MVRPC trip generation rates. These trip rates were taken from Version5.4 of the OKI model. Table 7.2 shows a summary of the NHB trip generation estimates, as wellas a comparison with each region’s previous model estimates. The reduction in NHB tripsobserved with respect to the previous models stems from the reductions in HBW and HBO trips:as discussed in Section 6, OKI HBW and HBO trips were reduced by about 10%, while MVRPCHBO trips were reduced by approximately 25%.Table 7-1 NHB Trip Generation RatesPurposeHBW andHBOHBUModeAutoTransitAllTrip EndArea TypeCBD Urban Suburban RuralOrigins 0.4328 0.4476 0.4092 0.3163Destinations 0.3719 0.4482 0.4230 0.3367Origins 0.1458 0.4558 0.3889 0.3889Destinations 0.2778 0.3469 0.4167 0.4167Origins 0.3801 0.4478 0.4092 0.3175Destinations 0.3546 0.4453 0.4230 0.3373Table 7-2 Non Home Based Trip Generation EstimatesRegionConsolidated Model OKI v 5.4 & MVRPC Bas94 Percent DifferenceOrigins Destinations Origins Destinations Origins DestinationsOKI 1,598,936 1,623,648 1,783,293 1,815,543 -10% -11%MVRPC 716,364 730,069 782,381 775,052 -8% -6%Miami 69,280 72,791 80,851 68,218 -14% 7%Total 2,384,580 2,426,508 2,646,525 2,658,813 -10% -9%Trip Generation - Non-Home Based Trip Generation 38
OKI/MVRPC Travel Demand Model – Version 6.08. External Cordon Survey AnalysisAs part of the work involved in consolidating the MVRPC and OKI databases, two activities wereundertaken to re-number the 1995 ODOT external cordon surveys:• For stations that are part of the consolidated region, trip origin locations were projected ontothe consolidated traffic analysis zone map.• For stations that are not part of the consolidated region, both trip origin and trip destinationlocations were projected onto the consolidated traffic analysis zone map.Data from the consolidated region stations were then used to estimate an external-to-externaltrip table, as well as to re-estimate the internal-to-external trip end equations. These stationsare listed in Table 8.1 under "in-consolidated system". Data from stations at the border betweenOKI/MVRPC and MVRPC/Miami will be used to estimate observed trip length distribution functions(see Table 8.1, "not-in-consolidated-system" column for a list of stations). Note that only one setof boundary stations needs to be examined, either those included in the MVRPC set or thoseincluded in the OKI or Miami set. The additional OKI stations listed are those that do not havean equivalent station in the MVRPC model. The next sections describe in detail the geocodingeffort, survey expansion procedures, and the external trip table and trip end estimation.Table 8-1 External Stations to GeocodePlanning RegionIn the Consolidated SystemStation NumberNot in the Consolidated SystemOKI 4-25,43-83 36,37,41,42MVRPC 827,837,840-848,850-858, 872-877, 878, 880 828-836, 838, 839, 859-871, 881, 883, 884Miami Co. 120-132,142,145 NoneStation numbers correspond to ODOT’s numbering system.8.1 Geocoding Procedures and Results8.1.1 8.1.1 Stations in the Consolidated RegionAn extensive geocoding effort was undertaken to assign consolidated TAZ numbers to the ODOTexternal cordon survey records. Even though the survey data already included geographical triporigin information (latitude/longitude decimal coordinates and TAZs in the 1995 zone system),the conversion of this location information into the consolidated TAZs was not straight-forward,for two main reasons:• Due to the zone system modifications undertaken as part of this project, many of the 1995TAZs had no single corresponding TAZ in the consolidated system. 3 Hence a simple one-toonerelationship was ruled out for many zones. While in principle it should be possible to usethe coordinate information to locate the trip origin in the new, consolidated zone map, inreality this was also ruled-out because there are substantial inconsistencies between thecoordinate and the 1995 TAZ data.3 Appendix A of Part II contains a TAZ equivalence table.Trip Generation - External Cordon Survey Analysis 39
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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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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 # 76:Nest: auto vs transitVaria
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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 #140b (same as run #40)vot cons
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Part VITRIP ASSIGNMENT ANDVALIDATIO
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Index of TablesTable 2-1 Average Ve
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VOBFigure 4-8 Screenline Location -
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Table of Contents1. Introduction...
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Appendix FTravel Demand ModelingTec
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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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