Table 2
Comparative U.S. Metropolitan Area Person Trips per Capita,
Person Trips per Household, and Average Household Size

Region Year Trips per Capita Trips per Household Average Household Size
San Francisco Bay Area 1965 2.81 8.78 3.12
San Francisco Bay Area 1981 3.39 8.71 2.57
San Francisco Bay Area 1990 2.93 7.55 2.61
NPTS 1969 2.02 6.36 3.16
NPTS 1977 2.33 6.59 2.83
NPTS 1983 2.46 6.60 2.69
NPTS 1990 2.63 6.74 2.56
Philadelphia (PJTS) 1960 1.50 5.03 3.36
Philadelphia (PJTS) 1987/88 2.34 6.25 2.67
Los Angeles 1976 2.90 8.10 2.80
Los Angeles 1991 2.40 7.60 3.11
Dallas 1964 2.83 9.12 3.22
Dallas 1984 3.40 8.68 2.60
Denver 1971 2.81 8.69 3.09
Denver 1985 2.87 7.33 2.54
Chicago 1979 2.40 7.20 3.00
Detroit 1980 2.59 7.47 2.90
Sacramento 1991 3.71 9.72 2.62
California 1991 3.90 10.60 2.70
Atlanta 1972 2.49 7.20 2.90
Baltimore 1977 2.90 8.30 2.80
Buffalo 1973 2.50 7.50 3.00
Seattle 1987 4.04 9.89 2.45