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Table A-15
Vehicle Occupancy Per Vehicle Mile by Time of Day and Weekend Status

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  Mean SE
All personal vehicle trips 1.63 0.010
Trip start time    
Midnight-1 a.m. 1.47 0.065
1 - 2 a.m. 1.54 0.108
2 -3 a.m. 1.98 0.288
3 - 4 a.m. 1.26 0.109
4 - 5 a.m. 1.54 0.128
5 - 6 a.m. 1.30 0.047
6 - 7 a.m. 1.30 0.030
7 - 8 a.m. 1.33 0.020
8 - 9 a.m. 1.64 0.084
9 - 10 a.m. 1.58 0.043
10 - 11 a.m. 1.74 0.052
11 a.m - 12 p.m. 1.66 0.028
12 - 1 p.m. 1.74 0.033
1 - 2 p.m. 1.69 0.043
2 - 3 p.m. 1.67 0.029
3 - 4 p.m. 1.65 0.025
4 - 5 p.m. 1.64 0.039
5 - 6 p.m. 1.62 0.033
6 - 7 p.m. 1.78 0.032
7 - 8 p.m. 1.86 0.042
8 - 9 p.m. 1.85 0.047
9 - 10 p.m. 1.84 0.057
10 - 11 p.m. 1.64 0.050
11 - 12 a.m. 1.63 0.042
Weekend status    
Weekend 2.00 0.030
Weekday 1.50 0.010

NOTES: More accurately the categories are
Midnight to 00:59 a.m., 1 a.m. to 1:59 am, etc. SE = standard error.

SOURCE: The 2001 National Household Travel Survey, daily trip file, U.S. Department of Transportation.
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