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Table 8
Regional Work and Non-Work Trip Vehicle Occupancies
Historical and Projected

Trip Purpose Household Surveys Model Simulation
1965 1981 1990 1990 2015 2020
Home-Based Work 1.180 1.129 1.095† 1.097* 1.099* 1.107*
Home-Based Shop 1.443 1.241 1.416§ 1.423* 1.403* 1.411*
Home-Based Social / Rec 1.813 1.730 1.584§ 1.582* 1.576* 1.576*
Home-Based School 2.782 2.234 2.373§
Home-Based Grade School NA NA NA NA
Home-Based High School 3.205§ 4.200* 4.098* 3.996*
Home-Based College 1.164§ 1.261* 1.289* 1.289*
Non-Home-Based 1.445 1.254 1.206§ 1.207* 1.210* 1.210*
Total Trips 1.440 1.303 1.299§ 1.328* 1.334* 1.328*
§ 1965, 1981 and 1990 vehicle occupancy rates derived from household travel surveys.
ao ao98 ass98_fig1a.jpg ass98_fig1b.jpg ass98_fig1.gif ass98_fig1.jpg ass98_fig2.gif ass98_fig3.gif ass98_fig41.gif ass98_fig42.gif ass98_fig43.gif ass98_tab1.htm ass98_tab1.htm ass98_tab1.htm.1032395940.bck ass98_tab1.htm.1032396228.bck ass98_tab1.htm.new ass98_tab2.htm ass98_tab2.htm ass98_tab2.htm.1032395940.bck ass98_tab2.htm.1032396228.bck ass98_tab2.htm.new ass98_tab3.htm ass98_tab3.htm ass98_tab3.htm.1032395940.bck ass98_tab3.htm.1032396228.bck ass98_tab3.htm.new ass98_tab4.htm ass98_tab4.htm ass98_tab4.htm.1032395940.bck ass98_tab4.htm.1032396228.bck ass98_tab4.htm.new ass98_tab5a.htm ass98_tab5a.htm ass98_tab5a.htm.1032395940.bck ass98_tab5a.htm.1032396228.bck ass98_tab5a.htm.new ass98_tab5b.htm ass98_tab5b.htm ass98_tab5b.htm.1032395940.bck ass98_tab5b.htm.1032396228.bck ass98_tab5b.htm.new ass98_tab61.htm ass98_tab61.htm ass98_tab61.htm.1032395940.bck ass98_tab61.htm.1032396228.bck ass98_tab61.htm.new ass98_tab62.htm ass98_tab62.htm ass98_tab62.htm.1032395940.bck ass98_tab62.htm.1032396228.bck ass98_tab62.htm.new ass98_tab7.htm ass98_tab7.htm ass98_tab7.htm.1032395940.bck ass98_tab7.htm.1032396228.bck ass98_tab7.htm.new ass98_tab8.htm ass98_tab8.htm ass98_tab8.htm.1032395940.bck ass98_tab8.htm.1032396228.bck ass98_tab8.htm.1032397282.bck ass98_tab8.htm.1032397544.bck ass98_tab8.htm.new ass98_tab9.htm ass98_tab9.htm ass98_tab9.htm.1032395940.bck ass98_tab9.htm.1032396228.bck ass98_tab9.htm.new assume98.htm assume98.htm assume98.htm.1032395940.bck assume98.htm.1032396228.bck assume98.htm.1032397282.bck assume98.htm.1032397544.bck assume98.htm.new baycast1.htm baycast1.htm baycast1.htm.1032395940.bck baycast1.htm.1032396228.bck baycast1.htm.1032397282.bck baycast1.htm.1032397544.bck baycast1.htm.new baycast3.htm baycast3.htm baycast3.htm.1032395940.bck baycast3.htm.1032396228.bck baycast3.htm.new baycast.jpg baycount.jpg entry.meta figure1a.jpg figure1.jpg figure2.jpg hbcolm.jpg hbgsm.jpg hbhsm.jpg hbshmc.jpg hbsrmc.jpg hbwmc1.jpg hbwmc2.jpg hbwmc.jpg index.htm index.htm.1031767040.bck index.htm.1031768481.bck index.htm.1031769021.bck index.htm.1032395940.bck index.htm.1032396228.bck index.htm.1032397282.bck index.htm.1032397544.bck nhbmc.jpg _notes table1.htm table1.htm table1.htm.1032395940.bck table1.htm.1032396228.bck table1.htm.new table2.htm table2.htm table2.htm.1032395940.bck table2.htm.1032396228.bck table2.htm.1032397282.bck table2.htm.1032397544.bck table2.htm.new table3.htm table3.htm table3.htm.1032395940.bck table3.htm.1032396228.bck table3.htm.new table4.htm table4.htm table4.htm.1032395940.bck table4.htm.1032396228.bck table4.htm.1032397282.bck table4.htm.1032397544.bck table4.htm.new table51.htm table51.htm table51.htm.1032395940.bck table51.htm.1032396228.bck table51.htm.1032397282.bck table51.htm.1032397544.bck table51.htm.new table52.htm table52.htm table52.htm.1032395940.bck table52.htm.1032396228.bck table52.htm.1032397282.bck table52.htm.1032397544.bck table52.htm.new table53.htm table53.htm table53.htm.1032395940.bck table53.htm.1032396228.bck table53.htm.1032397282.bck table53.htm.1032397544.bck table53.htm.new table54.htm table54.htm table54.htm.1032395940.bck table54.htm.1032396228.bck table54.htm.1032397282.bck table54.htm.1032397544.bck table54.htm.new table55.htm table55.htm table55.htm.1032395940.bck table55.htm.1032396228.bck table55.htm.1032397282.bck table55.htm.1032397544.bck table55.htm.new table56.htm table56.htm table56.htm.1032395940.bck table56.htm.1032396228.bck table56.htm.1032397282.bck table56.htm.1032397544.bck table56.htm.new table57.htm table57.htm table57.htm.1032395940.bck table57.htm.1032396228.bck table57.htm.1032397282.bck table57.htm.1032397544.bck table57.htm.new table6a.htm table6a.htm table6a.htm.1032395940.bck table6a.htm.1032396228.bck table6a.htm.new table6.htm table6.htm table6.htm.1032395940.bck table6.htm.1032396228.bck table6.htm.new WS_FTP.LOG Regional model simulation using BAYCAST system, not assumed.
† Source: 1990 Census-based Observed home-based work trips.

Standard Vehicle Occupancy Assumptions:
Drive Alone = 1.0 persons per vehicle
Shared Ride 2 = 2.0 persons per vehicle
Shared Ride 3+ = 3.5 persons per vehicle

Note: The vehicle occupancy rates for home-based shop and social/recreation trips are
based on vehicle driver vs. vehicle passenger data from the 1965 and 1981 surveys. For
the 1990 survey, the vehicle occupancy rates are based on drive alone, shared ride 2 and
shares ride 3+ data. The vehicle occupancy data from the three household survey datasets
are not strictly comparable, given the incomplete information on vehicle occupants obtained
from household travel surveys.
Last Updated: 8/26/98
CPurvis, MTC

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