Table 10
Weekday Regional Trips per Household by Household Size
San Francisco Bay Area: 1965, 1981 & 1990 Household Travel Surveys

Household Size Year Percentage
of Households		 Home-Based Non-
Home-Based		 Total
Work Shop/
Other		 Social/
Recreation		 School
One Person
1965 15% 0.883 0.903 0.523 0.060 0.966 3.335
1981 26% 0.889 0.966 0.622 0.086 1.390 3.953
1990 26% 0.938 0.903 0.408 0.076 1.318 3.643
% Diff. 65-90 6% 0% -22% 27% 36% 9%
Two Persons
1965 30% 1.734 1.874 0.823 0.164 1.574 6.169
1981 33% 1.767 1.868 1.075 0.267 2.103 7.079
1990 32% 1.847 1.567 0.723 0.205 1.999 6.342
% Diff. 65-90 7% -16% -12% 25% 27% 3%
Three Persons
1965 18% 2.137 2.618 1.104 0.762 1.821 8.443
1981 16% 2.262 2.539 1.310 0.937 2.598 9.646
1990 17% 2.435 2.035 0.846 0.750 2.365 8.432
% Diff. 65-90 14% -22% -23% -2% 30% 0%
Four Persons
1965 17% 2.193 3.666 1.479 1.613 2.358 11.309
1981 15% 2.646 3.612 1.896 2.087 3.293 13.533
1990 14% 2.751 2.821 1.295 1.589 2.797 11.254
% Diff. 65-90 25% -23% -12% -1% 19% 0%
Five-or-More Persons
1965 20% 2.273 4.796 2.083 3.220 2.849 15.222
1981 10% 3.183 4.585 2.506 3.729 3.715 17.717
1990 11% 3.259 3.772 1.499 2.815 2.958 14.303
% Diff. 65-90 43% -21% -28% -13% 4% -6%
All Households
1965 100% 1.858 2.732 1.184 1.098 1.906 8.778
1981 100% 1.890 2.274 1.262 0.952 2.335 8.713
1990 100% 1.991 1.891 0.827 0.744 2.100 7.553
% Diff. 65-90 7% -31% -30% -32% 10% -14%