Travel Demand Model - OKI

OKI/MVRPC Travel Demand Model – Version 6.0Table 6-1 1995 Home-Based Trip Generation, Before Subtracting IE TripsC O N S O L I D A T E D M O D E LHome-Based Work Home-Based School Home-Based University Home-Based OtherRegion Productions Attractions Productions Attractions Productions Attractions Productions AttractionsOKI 1,140,284 1,233,402 13,959 14,021 56,200 55,419 3,332,871 3,312,280MVRPC 561,712 484,665 2,042 1,994 35,658 37,159 1,603,655 1,644,772Miami Co. 74,171 58,086 0 0 5,958 5,240 221,664 201,157All 1,776,167 1,776,153 16,001 16,015 97,816 97,818 5,158,190 5,158,209OKI MODEL 5.4 AND MVRPC BASE 94 MODELHome-Based Work Home-Based School Home-Based University Home-Based OtherRegion Productions Attractions Productions Attractions Productions Attractions Productions AttractionsOKI 1,152,052 1,154,614 13,886 a 13,885 a 55,890 56,096 3,338,244 3,345,972MVRPC 542,161 542,142 3,143 a 3,143 a N.A. N.A. 1,521,917 1,521,914Miami Co. 65,911 65,914 0 0 N.A. N.A. 151,540 147,802All 1,760,124 1,762,670 17,029 17,028 N.A. N.A. 5,011,701 5,015,688PERCENT DIFFERENCE (Consolidated Model - Previous Models)Home-Based Work Home-Based School Home-Based University Home-Based OtherRegion Productions Attractions Productions Attractions Productions Attractions Productions AttractionsOKI -1% 7% 0% 0% 1% -1% 0% -1%MVRPC 4% -11% -35% -36% N.C. N.C. 5% 8%Miami Co. 13% -12% 0% 0% N.C. N.C. 46% 36%All 1% 1% -6% -6% N.C. N.C. 3% 3%N.A: Not available; N.C: Not comparable.a Transit trips only; auto trips are included in HBO total.The HBW and HBO trip production rates applied in Step15 include trips attracted to zones outsideof the region, that is, internal to external trips. To avoid double-counting trips, the estimatedhome-based internal-to-external trips are subtracted from the initial estimate of HBW, HBO andNHB trips. Please refer to the OKI Model 5.4 development documentation for the procedure usedto allocate the internal to external trips. Note that, even though model 5.4 includes truck trips asa separate purpose, IE truck trips were subtracted from the HBW, HBO and NHB purposes.Tables 6.2 and 6.3 show the results of subtracting EI trips, both for the consolidated model andfor each region's original models. As expected, due to the consolidation of the three regions,there are less internal-to-external trip ends in the consolidated model than in the previousmodels. The total reduction in EI trips, approximately 366,000 vehicle trip ends, is due not onlyto the regional consolidation but also to the exclusion of IE truck trip ends from these modelestimates.Note that the IE trips listed on these tables are exclusive of truck trips; IE and EE truck trips areestimated by a separate model. Hence the IE percentages shown in Tables 6.2 and 6.3overestimate the true HBW and HBO IE proportions. It is estimated that about 30% of theestimated passenger vehicle IE trips are HBW productions and attractions while 55% are HBOproductions and attractions. The remaining 16% are NHB trips. These proportions arecalculated as follows:INTHBWPINTHBWAINTHBOPINTHBOAINTEI = EI + EI + EI + EI + EINHBINTTrip Generation - Trip Generation Analysis 23