Travel Demand Model - OKI

OKI/MVRPC Travel Demand Model – Version 6.0" Ungeocodable"AdjustmentFactorTotal Expanded Trips=Total Expanded Trips,Not Including Ungeocodable (" 9998") Re cords8.2.2 Expansion of Border Station Trip SurveysData expansion was based on records with a valid internal trip origin and valid trip destination(internal or external), that is, trips that were originally recorded as IE trips. Records of trips thatstart outside of the consolidated region are of no interest for trip distribution comparisonpurposes. The expansion factor was calculated as:Expansion Factor =Station KT arg et VolumeNumber of SurveysStation KStation KExpansion target volumes were obtained from the previous ODOT expansion work. 6 Table 8.7shows the weighted or expanded trip data.Table 8-7 Border Station Trip VolumesIE Car TripsIE Car TripsStation Vehicle units Person units Station Vehicle units Person units36 3,374 5,047 860 1,200 1,78937 1,162 1,655 861 2,165 3,10441 327 483 862 9,127 13,60342 226 349 863 3,624 5,117828 1,281 1,772 864 15,014 22,830829 6,879 10,669 865 48,984 61,755830 3,194 4,236 866 5,015 7,048831 1,396 1,787 867 3,336 4,882832 6,049 7,912 868 2,830 4,162833 35,114 43,753 869 501 782834 1,968 2,663 870 4,357 6,121835 821 1,055 871 614 909836 944 1,230 881 2,708 3,697838 4,668 6,140 883 273 394839 2,679 3,635 884 72 105859 3,673 6,272Data from these border stations were used to calibrate and validate the trip length frequencydistribution of trips that start in the OKI and end in the MVRPC region (and vice-versa). Tables8.8 and 8.9 are summaries of this OD table (work and non-work trips respectively). Trips thatended outside of the region were dropped, as they are not relevant to trip distribution calibration.Because the cordon survey intercepted trips traveling in the outbound direction only, thetranspose of the trip table obtained from the expansion process was used to represent traffic inthe opposite direction. And while in principle these OD trip tables should have zeros in thediagonal, the fact that they have non-zero diagonals probably is due to reporting and geocodingerrors.6 The original source of the traffic volume data is Processing of Cordon Line OD Survey Data, TechnicalMemorandum, Ohio DOT, Planning Division, Office of Technical Services, 2000; see Figure 8, Work and NonWork IE Trip columns.Trip Generation - External Cordon Survey Analysis 47